finished ccnp

[Iakovos Svolakis]

Hi all,

I have just finished CIT exam yesterday so from today I am a CCNP.
The problem is that I passed the old ACRC exam not the new BSCN.
Does anyone know if there is a problem with that?
And one more question about the CVOICE specialization: is there any book =
to read
for the exam?


Thanks



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CCNA2 book recommendation, please.

[BB]

Hello to all,

Kind enough to recommend a good book for CCNA2 exam study.


Cheers.



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Re: icmp weirdness

[Erick B.]

David,

A normal ping is being sourced from 132.158.132.252 to
10.43.3.230. You need to do a extended ping specifying
10.43.0.1 as the source. Type 'ping' then enter and
enter the target address then enter for the following
questions to take defaults. On the extended commands
question answer Yes. The next question is the source
address. Enter 10.43.0.1 and take the defaults for the
rest. The ping should work.

What is the default gateway on this 10.43.3.230 PC? If
their default gateway is 10.43.0.1 it should work but
if it's not and the PC has a static route for the
10.43.0.x with next hop of 10.43.0.1 then the ping
response (echo-reply) is being sent to the default
gateway address that PC has set. This is because it
doesn't know how to get back to the 132.158.132.x
network the ping (echo) came from. If you have the
user at the PC do a traceroute (tracert on windows) to
132.158.132.152 what is first IP address returned?
That is the first router it hits.

The issue with secondary address's is that traffic
generated from the router usually uses the primary IP
address on the interfaces unless told not to. Routing
protocols can have issues with secondarys. 

You should only use secondary address's for a short
time while changes are being made if needed for the
above reasons. If the 10.43.0.x network is the main
network at this location now then make that the
primary address on the interface and the other address
with less users the secondary until they get their IP
address changed.

HTH, Erick

--- David Cooper <[EMAIL PROTECTED]> wrote:
> Hey folks,
> 
>   I've got an issue at work I'd like to run by you. I
> sent a request to 
> cisco's forum but have yet to hear an answer from
> anyone. We have a Cisco 
> 2610 router in Ireland. This router has 1 Ethernet
> connected to a local 
> segment and s0 point-to-point frame relay going to
> chicago, Ill (sub 
> interface).  Heres the details on the Ireland
> router:
> 
> Ethernet segment: e0's primary address is
> 132.158.132.252/24 (some hosts 
> refuse to change addresses). e0's secondary is
> 10.43.0.1/16. 
> Serial 0/0.1 is 10.126.43.2/24. All advertised by
> Eigrp. 
> 
> 
> Chicago's router is:
> 
> Ethernet segment is varibly subnetted 10.4.0.0/16.
> Serial 0/0.13 is 10.126.43.1/24. Once again, Eigrp
> is the routing protocol.
> 
> There is a host on Ireland's lan with address
> 10.43.3.230/16.
> 
> If I log into Ireland's router and issue ping
> 10.43.3.230, nothing happens. 
> It just times out. If I log into Chicago's router
> and ping the same host, it 
> replies fine. If I ping it from a host behind
> Chicago's router, it replies as 
> well.  If another host on 10.43.0.0/16 pings that
> host it replies fine.  I 
> can ping any of 3.230's neighbors no problem. Its
> just that Ireland's router 
> wont ping it at all. show ip route verifies a route
> as directly connected. 
> 
> Has anyone heard of this? A bug? I can't verify all
> the way down because I 
> don't have physical access to Ireland's lan (thank
> god) to put a sniffer up. 
> 
> 
> We are trying to use this host for a second default
> route to a vpn box incase 
> the frame relay ever fails (and it does... often). 
> 
> Sorry to drag this on.
> 
> Thanks in advance.
> Dave Cooper, CCNA
> Littelfuse, Inc.



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Re: what is the average age of people in this stuff?

[Tom Lisa]

Howard,

For the benefit of those not aware, (i.e. YPK's) I meant the American Association of
Retired Persons (member apps available here: http://www.aarp.org/ ).  Priscilla also
made aware of the "other" AARP.  Personally, I've always thought that apples were only
good for eating or giving to your teacher to ensure a good grade (everybody may begin
the flames now--I have my asbestos underware on)! :)

BTW Priscilla, my grandkids have already assured that I am unique and special!!

Tom Lisa
Pres. OGC

"Howard C. Berkowitz" wrote:

> >Jess:
> >
> >Not to worry, I contacted AARP and was assured we can get a "senior
> >discount" on
> >blueberries and no-doze so we can compete with these young
> >whipper-snappers!  :)
> >
> >Tom Lisa, Instructor, CCNA, CCAI
> >Community College of Southern Nevada
> >Cisco Regional Networking Academy
>
> You contacted the AppleTalk Address Resolution Protocol?
>
> More seriously, some stereotyping is floating around.  I'm thinking
> of one of the most charismatic, impatient to fools yet committed to
> teaching those willing to learn, and out-of-the-box crazy thinkers
> I've ever met:  Grace Murray Hopper. Gee...I may have met her when
> she wasn't even 70 yet.
>
> I was saddened by an obituary I ran across today:  Claude Shannon.
> Shannon was the father of modern information theory. Shannon died on
> February 24, of Alzheimer's disease...which must have had to work
> very hard to conquer such a mind.   Having passed earlier, but also
> not to be forgotten, was Norbert Wiener.  We throw around the
> buzzword "cyber" so freely these days, but we forget Wiener was the
> person who formally defined "cybernetics."
>
> On a brighter note, involving even older people who are still vidal
> and active,Vint Cerf is the only person that does attend the IETF in
> a three-piece suit, which is treated as an honorary T-shirt.
>
> I can see someone young in years resenting a Dilbert-style manager
> who holds their position by playing corporate games.  But don't leap
> to conclusions -- someone who simply is "older" might very well be
> more technical.
>
> MCI's ads about Generation D thoroughly annoy me, with their talk of
> "Generation D," the first generation that's grown up digital.
> Ummm...take a look at a wonderful book called _The Victorian
> Internet_.  While there is debate about the 1790-ish French semaphore
> system being digital in the modern sense, the Morse telegraph in 1845
> is digital (if you'll include pulse width modulation in the
> definition and had recognizable protocols.   I don't know, offhand,
> when the teletypewriter was invented, but Nyquist's theorems on
> bandwidth were published in 1928.
>
> Depending on how you define "computer" (does it need a stored
> program, or self-modifiable program?), the first digital computer was
> late-1930 (Eckert & Mauchly, and the independent German developer
> whose name escapes me), or around 1950 with Von Neumann machines.
> FORTRAN was available in 1956 or so, admittedly when the head of IBM
> thought there would be a national market for about 6 computers.
> There were packet networks in the early 1970s.
>
> Exactly when did "Generation D" start?
>
> Some of us older folk have been getting better at this for a long,
> long time, and haven't slowed down. Might have changed emphasis.
>
> >
> >
> >[EMAIL PROTECTED] wrote:
> >
> >>  Tom:
> >>
> >>  You are not alone; I just turned 50 on Thursday and am working on
> >>my CCNA and
> >>  hope to test in June, then go on for my CCNP.
> >>
> >>  Regards,
> >>
> >>  Jess
> >  > MCP
>
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Re: computer networking degree (long reply)

[Tom Lisa]

Phil,

I agree with you wholeheartedly!!! (and I suspect so does Howard).  A solid foundation
in the basic science/technology that goes into developing networks is more valuable in
the long run.  Once you have that you can always build upon it.  Community/junior
colleges tend to focus on providing the student with the education & skills for 
specific
industry areas.  Our networking degrees, while incorporating general technology
concepts, are usually directed at specific vendors.

For example, I just finished developing (he said proudly, patting himself on the back 
:)
) an Associate of Applied Science, Internetworking Technologies degree program.  Aside
from all the general studies courses, it requires completion of the Cisco Networking
Academy CCNA courses, Novell CNE courses, and electives from the MCSE curriculum and 
our
telecommunications program.

As you can see, it is designed to give our students the skills (vendor specific) that
will most likely get them that first entry level networking position (perhaps the
hardest one to get).  For the most part we teach practical application, not theory.

Tom Lisa, Instructor, CCNA, CCAI
Community College of Southern Nevada
Cisco Regional Networking Academy


Circusnuts wrote:

> I think the Networking subjects are more of a community college or junior
> college thing.  If you are looking to invest time in a Bachelors or Master
> per say- I'd go with a mainline computer science & engineering degree (time
> & money).  This way the technologies will revolve around the bulk of what
> you know (this probably does not pertain to older degrees), nothing will
> seem too far of the beaten path.  Case in point- I have a friend who wants
> to follow the Cisco path, but has enrolled @ the local community college
> (Networking program).  His studies cover transmission technologies (analog,
> digital, MM, SM), patch panels arrangements, horizontal runs, etc., etc.
> Basic stuff that one can pick up from 1 or a small handful of books.
>
> Second (a coworker) just graduated from the University of Maryland with a
> computer science degree.  He immediately picked up all the Microsoft certs
> with little mental stretch & almost every Cisco project seems familiar to
> him.  The other day I was setting up a switching scenario to enable a path
> for IDS boxes & he started having flashbacks about Spanning Tree.
> Evidently- in his course of study he had most of the algoryms covered.  The
> application of what he's learned is now the fun part.
>
> Wrapping up-  the network studies track (I feel) is too focused on the
> physical network & the real world teachers (that can evoke change) do not
> exist like they should.  Computer Science is a neat place to start.  The
> fellow I work with might be an exception, but his first job out of school
> pays 50k & he teaches Microsoft/ N+ 20 hours a week for another 50k (@ 23
> years old).
>
> Now- there is a third person to factor.  My boss sold & repaired copiers in
> the 80's (when they were the hot commodity).  He built Novel servers in the
> late 80's (when they were the hot commodity).  He built Microsoft servers in
> the early & mid 90's (when they were the hot commodity).  He started his
> Cisco studies in the late 90's (when it was the hot commodity).  Today he is
> one of the most successful CCIE's I have ever met & though he has no formal
> education beyond high school, his network design trade allows him to bills
> out @ $200 an hour (with more business than he can handle).
>
> I say all this to say- pick you battles wisely & spend your education
> dollars as you see fit.
>
> All the best !!!
> Phil
>
> PS (no I'm not always this long winded, just home sick :-)
>
> - Original Message -
> From: "steve billy" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Wednesday, February 28, 2001 11:22 AM
> Subject: computer networking degree
>
> > Hi group,
> >
> > Can you please tell me good universities from where
> > one can obtain degree at the undergraduate and
> > graduate level in computer networking (specifically).
> >
> > Thanks
> > Steve
> >
> > __
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> > Get email at your own domain with Yahoo! Mail.
> > http://personal.mail.yahoo.com/
> >
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> http://www.groupstudy.com/list/cisco.html
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>
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Re: 1900 switch

[Tom Lisa]

If he is using Hyperterminal to the console port, he should be using a roll-over cable.
Also, make sure the DB9/RJ45 connector pin-out are correct.  Don't have my chart handy
or I would include (it's available on CCO somewhere + I'm sure it's in the archives).

Tom Lisa, Instructor, CCNA, CCAI
Community College of Southern Nevada
Cisco Regional Networking Academy

Rizzo Damian wrote:

> Did you try another straight through cable? 9 times out of 10, the cable is
> to blame.
>
> -Original Message-
> From: Charles Paver [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, February 28, 2001 9:24 PM
> To: [EMAIL PROTECTED]
> Subject: 1900 switch
>
> Hi--I cant hyperterminal into my new 1900 series
> switch!  I changed the baud rate to 9600, and left all
> the same, but still no dice!  Also, I changed the flow
> control to hware, to none...and I cant get on.
> Also,Im using nt ws, as well as windows 98.  Same
> error every time--weird characters across the screen.
> such as atx0h0
>
> its weird...
> any ideas?
>
>
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Re: icmp weirdness

[Kevin Wigle]

Whenever I can't ping - I trace route to see where it goes stupid.
And then I do it a few more times and compare the routes to see if they're
the same or not.
>From both ends of course.

Have you done this yet?

Kevin Wigle

- Original Message -
From: "David Cooper" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, 01 March, 2001 00:17
Subject: icmp weirdness


> Hey folks,
>
> I've got an issue at work I'd like to run by you. I sent a request to
> cisco's forum but have yet to hear an answer from anyone. We have a Cisco
> 2610 router in Ireland. This router has 1 Ethernet connected to a local
> segment and s0 point-to-point frame relay going to chicago, Ill (sub
> interface).  Heres the details on the Ireland router:
>
> Ethernet segment: e0's primary address is 132.158.132.252/24 (some hosts
> refuse to change addresses). e0's secondary is 10.43.0.1/16.
> Serial 0/0.1 is 10.126.43.2/24. All advertised by Eigrp.
>
>
> Chicago's router is:
>
> Ethernet segment is varibly subnetted 10.4.0.0/16.
> Serial 0/0.13 is 10.126.43.1/24. Once again, Eigrp is the routing
protocol.
>
> There is a host on Ireland's lan with address 10.43.3.230/16.
>
> If I log into Ireland's router and issue ping 10.43.3.230, nothing
happens.
> It just times out. If I log into Chicago's router and ping the same host,
it
> replies fine. If I ping it from a host behind Chicago's router, it replies
as
> well.  If another host on 10.43.0.0/16 pings that host it replies fine.  I
> can ping any of 3.230's neighbors no problem. Its just that Ireland's
router
> wont ping it at all. show ip route verifies a route as directly connected.
>
> Has anyone heard of this? A bug? I can't verify all the way down because I
> don't have physical access to Ireland's lan (thank god) to put a sniffer
up.
>
>
> We are trying to use this host for a second default route to a vpn box
incase
> the frame relay ever fails (and it does... often).
>
> Sorry to drag this on.
>
> Thanks in advance.
> Dave Cooper, CCNA
> Littelfuse, Inc.
>
> _
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icmp weirdness

[David Cooper]

Hey folks,

I've got an issue at work I'd like to run by you. I sent a request to 
cisco's forum but have yet to hear an answer from anyone. We have a Cisco 
2610 router in Ireland. This router has 1 Ethernet connected to a local 
segment and s0 point-to-point frame relay going to chicago, Ill (sub 
interface).  Heres the details on the Ireland router:

Ethernet segment: e0's primary address is 132.158.132.252/24 (some hosts 
refuse to change addresses). e0's secondary is 10.43.0.1/16. 
Serial 0/0.1 is 10.126.43.2/24. All advertised by Eigrp. 


Chicago's router is:

Ethernet segment is varibly subnetted 10.4.0.0/16.
Serial 0/0.13 is 10.126.43.1/24. Once again, Eigrp is the routing protocol.

There is a host on Ireland's lan with address 10.43.3.230/16.

If I log into Ireland's router and issue ping 10.43.3.230, nothing happens. 
It just times out. If I log into Chicago's router and ping the same host, it 
replies fine. If I ping it from a host behind Chicago's router, it replies as 
well.  If another host on 10.43.0.0/16 pings that host it replies fine.  I 
can ping any of 3.230's neighbors no problem. Its just that Ireland's router 
wont ping it at all. show ip route verifies a route as directly connected. 

Has anyone heard of this? A bug? I can't verify all the way down because I 
don't have physical access to Ireland's lan (thank god) to put a sniffer up. 


We are trying to use this host for a second default route to a vpn box incase 
the frame relay ever fails (and it does... often). 

Sorry to drag this on.

Thanks in advance.
Dave Cooper, CCNA
Littelfuse, Inc.

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Boot Rom for Cisco 2500 series routers

[CiScO]

Is there anyone looking for Cisco 2500 router boot roms? I have the latest
from Cisco,  version 11.0(10c)XB2. I currently have several sets left. All
brand new. I am willing to ship the item at no cost within the US. If you're
interested please send an email so we can arrange shipping and payment.

Helpful Links below:

Boot Rom features and fixes:
http://www.cisco.com/warp/public/471/30.shtml

Replacing Boot Rom chips Instructions:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_fix/cis2500/2500c
fig/bootrom.htm


Thanks!

Joe N. CCNA
http://www.tmjf.com



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Clear Channel Transmission

[Turfis]

Could some please explain what Clear Channel Transmission is?  How it is
used across a backbone?  And any additional info on this technology?  In
simple terms, Thanks.

Searched the web and came up with stuff like:

Clear Channel Transmission
Clear Channel Transmission defines the amount of data occupied by a single
user's network application. Al Gore's ideas about the need for an NREN not
withstanding, clear channel gigabit TCP/IP transmission over a wide area
network is not yet a proven technology let alone economically viable.

clear channel capability (CCC): A characteristic of a transmission path in
which the bit position allocated for customer data may represent any
combination of zeros and ones. For the DS1 rate, the bits allocated for
customer data are the last 192 bits of each frame. [T1.408-1990]

???


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my VoIP box on ebay

[Neal Rauhauser]

  I've never spammed the list before with stuff I am selling but I
am quite proud of this 1750 - specifically:


1750-2V, 48 meg of dram, PVDM-4, vic-2fxs, wic-1t, wic-1b-u - VoIP, sync
serial, and ISDN all in one neat little package. The only way this could
be better is if the 10/100 port on the 17xx would do ISL or 802.1Q -
they DON'T - so don't buy it thinking it'll do VLANs along with all the
other neat stuff it has installed.

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1218538608


   I'd rather see someone on here get it than have it go to some
equipment dealer who will part it out.

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RE: Reverse telnet Problem

[Muhammed Khalilullah]

Did you try 'transport input all' command on the
lines?
Give it a try.

Muhammad Khalilullah
Network Enginner
MCSE, CCNP

--- YY <[EMAIL PROTECTED]> wrote:
> can you reverse-telnet from console ?
> 
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of
> vikas patel
> Sent: Wednesday, February 28, 2001 8:26 PM
> To: [EMAIL PROTECTED]
> Subject: Reverse telnet Problem
> 
> 
> Hello Group,
> I have cisco 2511 router connected with Zyxel modem
> rack with 16 analog 33.6 
> Kbps modems. I want to reverse telnet into all of
> these modems without using 
> the console port and hyper terminal for changes to
> be done in all of these 
> modems by telneting into ethernet port of the
> router.
> The process i do is:
> 1). I telnet into ethernet port IP
> 2). then i give the command
> Router>telnet (ip of ethernet) 2001
> Here 2000+n, where n=1, is the first modem out
> of my 16 modem.
> 
> this shows the following message
> 
> Trying ...
> % Connection refused by remote host
> 
> 3). I checked that their is no user connected on
> this modem.
> 4). I also checked that the line is configured for
> modem inout
> 5). The show line 1 showed the following values:-
> Modem state: Idle
> Modem Hardware state: CTS noDSR DTR RTS
> 
> What is wrong here, i think this is perfect way to
> communicate with the 
> modem thru routers. One more thing that i would tell
> you is that the 
> modems(16) are allready configured.
> 
> So friends, i need your help in configuring my
> modems using router.
> 
> Waiting for ur replies
> 
> Kind regards
> vikas
>
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Re: CCNA question

[Julie Stewart]

By default IP split-horizon is disabled on a frame-relay physical IP
interface,
enabled on a frame-relay point-to-point IP subinterface, and enabled
on a frame-relay multipoint IP subinterface.

Caslow's book has a good chapter on this.

Julie Stewart

- Original Message -
From: "Jose Rodriguez" <[EMAIL PROTECTED]>
Newsgroups: groupstudy.cisco
To: <[EMAIL PROTECTED]>
Sent: Wednesday, February 28, 2001 11:18 PM
Subject: CCNA question


> Hello,
>
> I wanted to ask what were the defaults for split horizon on frame relay.
I
> thought that split horizon was disabled on
>
> 1) FR interfaces without sub-ifs
> 2) FR multipoint interfaces
>
> and enabled on
>
> 1) FR point to point interfaces
>
> --
>
> Jose Rodriguez
>
>
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Re: Training on switches.

[Julie Stewart]

If you're looking for CD-ROM, the Cisco LAN Switching CIM
has some tutorials and labs (Cat5000 emulation).  If your company is a Cisco
partner you can access the CIM for free on the Cisco website under Partner
E-Learning Connection.

Julie Stewart

>
> Heckle wrote in message <[EMAIL PROTECTED]>...
> >I am trying to find  aresource to get some training on Cisco Switches
> >(2900's thru 5500's) for some people at work. Something on CD would be
> >best. Perhaps something like  Learneky offers. Can anyone mak eany
> >sugegstions?
> >
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CCNA question

[Jose Rodriguez]

Hello,

I wanted to ask what were the defaults for split horizon on frame relay.  I
thought that split horizon was disabled on

1) FR interfaces without sub-ifs
2) FR multipoint interfaces

and enabled on

1) FR point to point interfaces

--

Jose Rodriguez


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Re: NIC card for redundancy

[David C Prall]

Take a look at Intel, Compaq has a similar offering which I believe is based
on the Intel chipset.

David C Prall   [EMAIL PROTECTED]   http://dcp.dcptech.com
- Original Message -
From: "Federico Díaz Herrera" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 27, 2001 4:06 PM
Subject: NIC card for redundancy


>
> HI, I'll  setup and server farm with 2 6509 switches in redundancy
> configuration using HSRP, but the side of server which NIC is the
> appropriated using W2K like OS to put one port active and the other
> standby...
> thanks for your help
>
>
> 6509MSFC 6509MSFC
> \ /
>   HSRP
> / \
> NIC1(act) NIC2(stby)
>
> regards
>
> --
> Federico Díaz Herrera
> Lógistica y Proyectos
> Ingeniería de Redes y Telecomunicaciones
> Ingeniero
> --
> Terra Networks México
> Blvd. Díaz Ordaz 123 Pte.
> Col. Santa María.
> Monterrey, NL. México, 64550
> Tel. 8150-4297
> Fax 8150-4280
> Page 8144-0800
> --
> Mercado Continuo: TRR | Nasdaq: TRLY
> --
> México 
> --
>
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RE: Free download of Exam Qs!

[hp 8780]

Hi,

Can you unzip the .zip file and view the Q&A's?
Why it asked for a password when I try to unzip it?


-Original Message-
From: Dave W. [mailto:[EMAIL PROTECTED]]
Sent: Sunday, February 25, 2001 10:31 AM
To: [EMAIL PROTECTED]
Subject: Re: Free download of Exam Qs!


I have viewed the Q & A's and I have a strong feeling
that those questions 
are more suitable for CCNP v1 rather than CCNP v2. 
They don't even follow 
the exam objectives.

And they cost $$$? I don't think they worth it.  Let's
save some bucks and 
time and get moving with Cisco study guides. :)

Dave


Original Message Follows
From: "Noel Fredrick" <[EMAIL PROTECTED]>
Reply-To: "Noel Fredrick" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Subject: Free download of Exam Qs!
Date: Sat, 24 Feb 2001 23:38:38 +0530

Hi listers,
Visit this site it has got 100 BSCN and 75 BCMSN free
downloadable Qs & =
Answers with explanations.
=20
www.sureshhomepage.com

thanks
Noel

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can I fix the IP on a account which dial in access server

[Sim, CT (Chee Tong)]

I have a Cisco access server AS2509 to use for people to dial in and when I
use our DHCP to assign IP for the dial in workstation, as shown below.

BUT,  I want to fix a IP address for the specific account when dial in ,
when tongiscute dial in, his IP will forever be 50.100.166.100 can it be
done??


!
hostname access_server
!
enable secret 5 $1$rfub$oh/NltB4DqsEY6ydZNKKb/
!
username tongiscute password 0 abc123
username keongk password 0 kong123
username kongk password 0 kong123
username tangch password 0 tang123
ip host modem1 2001 50.100.166.11
ip host modem2 2002 50.100.166.11
ip host modem3 2003 50.100.166.11
ip dhcp-server 50.100.165.10
!

==
De informatie opgenomen in dit bericht kan vertrouwelijk zijn en 
is uitsluitend bestemd voor de geadresseerde. Indien u dit bericht 
onterecht ontvangt wordt u verzocht de inhoud niet te gebruiken en 
de afzender direct te informeren door het bericht te retourneren. 
==
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and is intended to be exclusively for the addressee. Should you 
receive this message unintentionally, please do not use the contents 
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Re: 2500 series e0 fullduplex?

[Brian]

on 1e2w's and 2e2w's you can set full/half duplex on the 10Mbps ports


On Wed, 28 Feb 2001, Marty Adkins wrote:

> Priscilla Oppenheimer wrote:
> >
> > Regarding the original question, though I couldn't find a URL to confirm
> > this, I don't think the Ethernet AUI port on the 2500 series Cisco router
> > supports full duplex. I think the 2500 routers came out before full duplex
> > Ethernet existed for one thing. Also, I doubt that it is possible to
> > support full duplex with an AUI attachment. You would need a way to tell
> > the transceiver to ignore collision detection, and that's probably not
> > supported.
> >
> The 2500 e0 is definitely half-duplex CSMA/CD only.  It uses a LANCE chip
> as its "NIC" which predates fast Ethernet.  AFAIK, there are no Cisco
> routers with 10Mb Ethernets that support full-duplex.  Prior to the
> introduction of fast Ethernet in the industry, there were a few NIC
> vendors that added full-duplex capability to 10Mb cards.  But it never
> really caught on; plus it was superceded by 10/100.
>
>   Marty Adkins Email: [EMAIL PROTECTED]
>   Mentor Technologies  Phone: 240-568-6526
>   133 National Business Pkwy   WWW: http://www.mentortech.com
>   Annapolis Junction, MD  20701Cisco CCIE #1289
>
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---
Special: Catalyst 3100 switch & 2503 router
 module $1000.00 (16MB / 8MB)!!!

I'm buying / selling used CISCO gear!!
email me for a quote

Brian Feeny,CCDP,CCNP+VAS Scarlett Parria
[EMAIL PROTECTED] [EMAIL PROTECTED]
318-222-2638 x 109318-222-2638 x 101

Netjam, LLC   http://www.netjam.net
1401 Oden St. VISA/MC/AMEX/COD
Suite 18  Cisco Channel Partner
Shreveport, LA 71104
Fax 318-221-6612

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Re: quick way to clear config totally

[Arthur Simplina]

Before I configure routers, I do the following commands to clear the 
configurations:

erase nvram (or write erase)
reload
show run  (to check the configurations - there should be no router
   configurations left)

Arthur



>From: "Christopher Kolp" <[EMAIL PROTECTED]>
>Reply-To: "Christopher Kolp" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Subject: quick way to clear config totally
>Date: Wed, 28 Feb 2001 17:21:46 -0500
>
>Is there a quick way to clear the entire config of a router?
>
>"setup" doesn't kill everything and I don't have the IOS to re-flash.
>
>any help is greatly appreciated since every way I've tried just doesn't
>take away everything, ie. access lists, etc...
>
>Thanks!!!
>
>Sincerely,
>
>Chris Kolp, CCNA
>Systems Engineer
>Neuron Broadcasting Technologies
>
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Re: How to stash more than 100 ACLs in a router

[Brian]

if you're talking about IP acl's, in 12.1 / 12.0T cisco has added more
acl's for ip, check the release notes, its no longer limited to 100
extended and standard ip acl's

On Wed, 28 Feb 2001, ciscojolof wrote:

> Guys,
>
> I have a problem, in our network we are rate-limiting customers but we
> cannot get more than 100 ACLs per router so once we have over 100 customers
> we are compelled to install a second router.
>
>
>
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>


---
Special: Catalyst 3100 switch & 2503 router
 module $1000.00 (16MB / 8MB)!!!

I'm buying / selling used CISCO gear!!
email me for a quote

Brian Feeny,CCDP,CCNP+VAS Scarlett Parria
[EMAIL PROTECTED] [EMAIL PROTECTED]
318-222-2638 x 109318-222-2638 x 101

Netjam, LLC   http://www.netjam.net
1401 Oden St. VISA/MC/AMEX/COD
Suite 18  Cisco Channel Partner
Shreveport, LA 71104
Fax 318-221-6612

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Fwd: Re: Regarding RIF

[sports]

 These are a few links that I received when I asked this same 
question a few weeks ago.  The Lou Rossi Whitepaper is excellent.

http://www.groupstudy.com/notes/notepages/rif2.html

Also, Lou Rossi, Sr's "Token Ring Whitepaper" is a must-have.
You can find it on the CCPrep.com's website

http://www.ccprep.com/resources/news/archives/Token_Ring2.pdf



Almazi Rashid wrote:

> Hi All:
> Could you guys know how to calculate or figure out RIF from a given network 
> diagram for SRT,SR/TLB,RSRB environment.Thanks in Advance.
> 
> Regards
> Almazi
> CCNP,CCIE Theory unsuceesful in first attempt.
> 
> 
> _
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> 
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> 

-- 
Andrew E. Shappell
CCNP & CCDP
Network Engineer II
Adelphia High Speed Data Operations
[EMAIL PROTECTED]
(814)274-6751

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RE: 1900 switch

[Rizzo Damian]

Did you try another straight through cable? 9 times out of 10, the cable is
to blame.





-Original Message-
From: Charles Paver [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 28, 2001 9:24 PM
To: [EMAIL PROTECTED]
Subject: 1900 switch


Hi--I cant hyperterminal into my new 1900 series
switch!  I changed the baud rate to 9600, and left all
the same, but still no dice!  Also, I changed the flow
control to hware, to none...and I cant get on. 
Also,Im using nt ws, as well as windows 98.  Same
error every time--weird characters across the screen. 
such as atx0h0

its weird...
any ideas?
 

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RE: 2500 series e0 fullduplex?

[Andrew Cook]

Howard C. Berkowitz wrote:
> It will not.  Although if you have a 2500 series with two Ethernet
> ports, there is a hack where you can combine the two with a Y-cable,
> making one port transmit-only and one port receive-only, and connect
> the joined end of the Y-cable to a full duplex switch port.
>
Wow!  I'm going to fire up my 2514 this weekend and try this one just for
kicks.

Andrew Cook

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1900 switch

[Charles Paver]

Hi--I cant hyperterminal into my new 1900 series
switch!  I changed the baud rate to 9600, and left all
the same, but still no dice!  Also, I changed the flow
control to hware, to none...and I cant get on. 
Also,Im using nt ws, as well as windows 98.  Same
error every time--weird characters across the screen. 
such as atx0h0

its weird...
any ideas?
 

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Re: juniper and cisco

[Howard C. Berkowitz]

>
>
>Is anyone on the list familiar with a problem with Juniper's BGP 
>implementation
>when peering with other vendors?

An observation or two.  The authors of the BGP-4 specification are 
Tony Li and Yakov Rekhter.  Tony was the principal programmer of the 
Cisco code, as well as the Juniper code (Dave Katz, in contrast, 
wrote both Cisco's and Juniper's ISIS).

Tony is off to a new startup, Procket, while Yakov left Cisco for Juniper.

Personally, I tend to discount reports that people can't write code 
for one platform that will interoperate with code they themselves 
wrote on another platform.  Standards compatibility, given that the 
key people here wrote the standards as well, is unlikely to be an 
issue.

Sounds like more FUD.

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Re: Managed or "smart" Hub

[jennifer . margrison]

A "managed" or "smart" hub might store information about layer2 and still
be a layer 1 device.

To give a specific example: the Synoptics 2813 (later Bay networks, later
Nortel) was a manageable/smart hub, "layer 1 multiport repeater" ( to quote
Howard) with "management functions", not a bridge.  However it kept a list
of mac addresses on each port, the number of bytes going into the hub from
each port, and some packet size distribution statistics, all available by
SNMP.

But these were management statistics only. What came in one port, went out
all the other ports, like any other "layer 1 multiport repeater".

Jenny

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Re: Fw: juniper and cisco

[Howard C. Berkowitz]

>Hate to follow up on my own message, but here goes:
>
>After sending, I ran to google to see if I could find out what this 
>problem was
>about.
>
>It seems that JUNOS had a dampening bug at one point where it would doubly
>penalize a flap, once at withdraw time, and again at re-advertise time.
>
>The link I turned up that describes the issues is at:
>http://www.cctec.com/maillists/nanog/current/msg00140.html
>
>This was from back in December, so I would imagine it's been corrected by now.

Even more than the NANOG list, the CISCO-NSP and JUNIPER-NSP mailing 
lists discuss bugs.  There is a difference between implementations 
having bugs -- they all will -- and fundamental design problems.  The 
description you first described sounded like the Cisco engineer was 
describing a fundamental design problem.

Quite frankly, one of the things I like about working in the carrier 
space is that there's far less hype and FUD than in the enterprise 
market.  If I started touting the benefits of a "single-vendor, 
end-to-end solution" to UUnet/MCI/MFS/Other members of the Worldcom 
collective, Qwest, Level 3, Sprint, BBN/GTE/Verizon, etc., they'd 
look at me as if I was out of my mind.  (Not sure about that, some of 
my technical ideas also get such a reaction at first).

The draft I'm updating on BGP convergence will be coauthored by me at 
Nortel, Alvaro Retana at Cisco, Sue Hares and Padma Krishnaswami at 
NextHop (the former GateD/Merit).  We are actively trying to get a 
coauthor from Juniper, and we've gotten reviews from Alcatel.  The 
fact that all of us want some common standards to be compared on is a 
far cry from some of the salesy stuff that floats around in other 
markets.

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RE: How to stash more than 100 ACLs in a router

[Howard C. Berkowitz]

>You need to limit your ACLs because the more ACLs your CPU usage will go up.


No, the total number of ACLs affects memory but not CPU.

The number of lines in each ACL affects CPU.

Depending on platform and switching mode, adding access-lists at ALL 
is the main impact on performance and CPU.

But saying you need to limit your ACL's because usage will go up 
doesn't make sense.  If you have a legitimate need for the functions 
that the ACLs perform, and your CPU isn't fast enough, you need to 
get a router with a faster CPU.  The ACLs are there for a business 
reason.  The only justification for the router is to meet business 
requirements.  There's no value to conserving a resource just for the 
sake of conserving it.

>-Original Message-
>From: ciscojolof [mailto:[EMAIL PROTECTED]]
>Sent: Wednesday, February 28, 2001 9:51 AM
>To: [EMAIL PROTECTED]
>Subject: How to stash more than 100 ACLs in a router
>
>
>Guys,
>
>I have a problem, in our network we are rate-limiting customers but we
>cannot get more than 100 ACLs per router so once we have over 100 customers
>we are compelled to install a second router.

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RE: Private Vlans

[Howard C. Berkowitz]

>http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sft_6_1/configgd
>/vlans.htm
>
>http://www.cisco.com/warp/public/cc/pd/si/casi/ca6000/tech/c65sp_wp.htm
>
>Give a good idea of configuring and deploying PVLAN's
>

These pointers became my introduction to Private VLANs.  My first 
impression of the material was "huh?  What problem is this solving?"

My second impression is that the marketing people have come up with 
yet another proprietary name for a set of functions that all are 
well-defined, although admittedly it may be original to package them 
together.

The motivation for much of this seems to be generalizing "Ethernet" 
to non-LAN applications, such as using optical Fast or Gigabit 
Ethernet as an access technique.  Inside Nortel, I recently was 
accused of sending out the "sermon email" bewailing that the word 
"Ethernet" is being extended so that it's approximately as precise as 
"switch" or "hub," rather than a family of specific IEEE 802 
specifications and some vendor extensions.

As I read the Private VLAN spec, although I haven't extensively 
analyzed it, it appears to be a means of imposing a hub-and-spoke, 
NBMA subnet onto a switched Ethernet subnet.  In other words, 
switched Ethernet is normally a classical IP subnet that follows the 
local versus remote assumption:  if you are on the same subnet as 
another node, according to this assumption, you have layer 2 
connectivity to it.  WAN NBMA services such as frame and ATM partial 
meshes violate this assumption.

Private VLANs appear to be such a topology restriction, which I 
suppose may have applications when VLAN technology is simply being 
used for transmission. It's rather ironic that VLANs, as first 
defined in IEEE 802.10, were conceived as a security solution and 
included encryption.  The evolution to 802.1 took out the security 
features, but Private VLANs are introducing a different security 
mechanism.

If I went back to basics in the 802.10 model and applied it to 
private VLANs, considering one direction of transmission only just 
for simplicity, I might achieve a cryptographic equivalent that 
suggests that the promiscuous node had a set of decryption keys for 
traffic encrypted by isolated ports.  Isolated ports would each have 
a unique encryption key.  Another way to look at it is that there is, 
in IPsec terms, a set of security associations from the isolated 
ports to a common promiscuous port. Many-to-one topology, in contrast 
to the usual one-to-many we see in multicast.

On the other hand, the same topology could be achieved by having each 
isolated node use a /31 subnet, or some flavor of unnumbered subnet, 
and have the promiscuous node present some aggregated subnet to the 
larger routing system.

So I'm not sure precisely what problem this solves.  It seems to have 
an assumption that it is worthwhile to reduce the number of VLANs in 
the system, but I'm not completely sure why this is a problem. 
Limiting IDB consumption by subinterfaces perhaps?

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Re: 2500 series e0 fullduplex?

[Howard C. Berkowitz]

[I haven't seen any of my posts arrive in my mailbox for about two 
days. Hope this isn't a duplicate.]


>100mbps is not ethernet be sure its fast ethernet ,also their is no 
>collisions in fast
>ethernet ,its colliision free

No, there are layer 1 hubs for Fast Ethernet, which were once a 
reasonable alternative to switches for selected applications, until 
switch prices came down.  A Fast Ethernet hub does have collisions.

It is true that Fast Ethernet does not use (so far as I know) shared 
cable such as 10Base5 or 10Base2.


>and this is only possible if u have one way to send and
>one way to recieve data simultaneously :) i am sure u got the idea
>secondly in ethernet there are collisions and if there are 
>colliisions  Can u use one to
>send and one way to recieve simultaneously with collisions so if u 
>cant the result is
>ethernet works in half duplex mode and fast ethernnet works in full duplex
>if u have any thing different than me plz share with us
>waiting ur reply
>Saif
>
>Neil Schneider wrote:
>
>>  It is NOT true that ethernet is half and fastethernet is full duplex.
>>  Either 10Mbps or 100Mbps ehternet can be run in half or full duplex mode.
>  > And offhand I don't know if the 2500 AUI port will do full ethernet.

It will not.  Although if you have a 2500 series with two Ethernet 
ports, there is a hack where you can combine the two with a Y-cable, 
making one port transmit-only and one port receive-only, and connect 
the joined end of the Y-cable to a full duplex switch port.

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RE: juniper and cisco

[Yip Chan Keong]

> shared memory, not shared bus.  There is a difference.  I don't
>have the URL handy, but Cisco has a paper out by the Stanford
>University professor who architected the GSR.  It does a nice
>comparison of the three basic architectures, shared bus, shared
>memory, and crossbar.  Shared bus runs out of steam at about 2Gbps,
>and the 7500 is about the highest end Cisco product that uses it.
>Junipers are generally shared memory and GSRs are generally crossbar.

Howard,

i think you are referring to this paper?

http://www.cisco.com/warp/public/cc/pd/rt/12000/tech/fasts_wp.pdf

regards,
/yck

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RE: quick way to clear config totally

[Daniel Cotts]

You got me.  However, in replying to the list I often give a more
complete version of the command so that those who are new understand what we
are trying to accomplish. Having said that, I acknowledge that there is
value in being brief.

> -Original Message-
> From: Gregg Green [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, February 28, 2001 5:58 PM
> To: [EMAIL PROTECTED]
> Subject: Re: quick way to clear config totally
> 
> 
> 
> bah, too much typing.
> 
> #wr e
> #rel
> 
> that's IP Plus, enterprise may have other goofy options that 
> will result
> in an "% Ambi command..."
> 
> 
> On Wed, 28 Feb 2001, John Neiberger wrote:
> 
> > >From privileged mode:
> > 
> > #erase startup-config
> > #reload
> > 
> > >>> "Christopher Kolp" <[EMAIL PROTECTED]> 2/28/01 
> 3:21:46 PM
> > >>>
> > Is there a quick way to clear the entire config of a router?
> > 
> > "setup" doesn't kill everything and I don't have the IOS to 
> re-flash.
> > 
> > any help is greatly appreciated since every way I've tried just
> > doesn't
> > take away everything, ie. access lists, etc...
> > 
> > Thanks!!!
> > 
> > Sincerely,
> > 
> > Chris Kolp, CCNA
> > Systems Engineer
> > Neuron Broadcasting Technologies
> > 
> > _
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html 
> > Report misconduct and Nondisclosure violations to 
> [EMAIL PROTECTED]
> > 
> > 
> > 
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> > 
> 
> 
> Gregg Green   IHETS
> Senior Network Engineer  [EMAIL PROTECTED]
> 
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Re: good book on T1

[Charles Dunkirk]

try here for info
http://www.everythingt1.com/
  hth
Chuck dunkirk

Adam Wang wrote:

> Anyone know a good book on T1.
> Thanks
>
> Adam Wang
>
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Re: 2500 series e0 fullduplex?

[Priscilla Oppenheimer]

At 11:04 AM 3/1/01, Tony van Ree wrote:

>Most modern day devices allow 10/100Meg half or full duplex this allows 
>legacy systems to interoperate.  Coax has be written out of the standards.

Are you sure? My copy of IEEE 802.3 is a few years old, but it still has 
10Base5, 10Base2, 10Broad36 and even 1Base5. I don't think they remove 
technologies; they just add to them.

Also, Gigabit Ethernet supports coax, believe it or not. For wiring room 
applications you can connect two Gigabit Ethernet devices via a 25-meter 
coax cable.

However, I understand the gist of your message. Most people would not 
install a new Ethernet using coax.

Priscilla


>There are however heaps of devices that still only have 10Meg Half duplex 
>ports.  They must and can only be used at 10Meg Half Duplex end of story 
>for them.  The 2500 series routers are quite old (not compared to me but 
>more than 3 years is common).  The earlier ones were released prior to 
>100BaseT being available.
>
>Just some thoughts
>
>Teunis,
>Hobart, Tasmania
>Asutralia
>
>
>On Thursday, March 01, 2001 at 03:58:18 AM, SAIF wrote:
>
> > well its not a terminology thing u see its understood when u use 
> 100mbps its then not
> > csma/cd ethernet thing ,they made it like thre will be no collisions 
> and speed will be
> > 10 times than 10 mbps
> > yes u r right on 36xx router there is full/half/auto duplex but u didnt 
> get the idea
> > ,its basically technology which is sensing which media is supported to 
> that interface
> > ,if it is 10mbps then interface will make it half duplex ethernet and 
> i it is 100mbs
> > it will make it fast ethernet full duplex and u have choice to make it 
> half/full duplex
> > by ur choice according to ur existing medium and toplogy
> > THAT PORT MUST BE NOT A FASTETHERNET PORT  BUT IT CAN BE IF U USE IT IN 
> 100MBPS WAY
> > THERE IS ANOTHER THING YES IT IS POSSIBL I AGREE U CAN WORK 10BASE 
> T  (ONLY NOT
> > COAXIAL) WITH FULL DUPLEX BUT THE THING IS THAT WHAT I WAS POINTING 
> THAT CISCO PRODUCTS
> > USUALLY DONT SUPPORTFULL DUPLEX WITH 10MBPS
> > AM I WRONG ?
> >
> > Neil Schneider wrote:
> >
> > > Sorry but you are incorrect.  (unless we just have a terminology 
> difference
> > > here) Just becuase you are running 100mbps. it is not automatically full
> > > duplex.  the Fastethernet ports on routers (3640 seriesfor example) 
> can be
> > > set to full/half/auto duplex.  why bother with a half duplex setting 
> if all
> > > fastethernet is full duplex?
> > >
> > > --
> > > Neil Schneider
> > > MCT  MCSE  CCSI  CCNP
> > >
> > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > 100mbps is not ethernet be sure its fast ethernet ,also their is no
> > > collisions in fast
> > > > ethernet ,its colliision free and this is only possible if u have 
> one way
> > > to send and
> > > > one way to recieve data simultaneously :) i am sure u got the idea
> > > > secondly in ethernet there are collisions and if there are colliisions
> > > Can u use one to
> > > > send and one way to recieve simultaneously with collisions so if u cant
> > > the result is
> > > > ethernet works in half duplex mode and fast ethernnet works in full 
> duplex
> > > > if u have any thing different than me plz share with us
> > > > waiting ur reply
> > > > Saif
> > > >
> > > > Neil Schneider wrote:
> > > >
> > > > > It is NOT true that ethernet is half and fastethernet is full duplex.
> > > > > Either 10Mbps or 100Mbps ehternet can be run in half or full duplex
> > > mode.
> > > > > And offhand I don't know if the 2500 AUI port will do full ethernet.
> > > > >
> > > > > --
> > > > > Neil Schneider
> > > > > MCT  MCSE  CCSI  CCNP
> > > > >
> > > > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > > > NO ITS ETHERNET PORT AND WORKING HALF DUPLEX ONLY ,U SEE CISCO 
> GIVES
> > > > > FASTETHERNET PORTS
> > > > > > SPECIALLY IN THEIR ROUTERS SPECIALLY IN 4XXX SERIES AND U KNOW
> > > ETHERNET
> > > > > WORKS IN HALF
> > > > > > DUPLEX AND FASTETHERNET WORKS IN FULL DUPLEX  SO THE RESULT IS AUI
> > > PORT IS
> > > > > HALF DUPLEX
> > > > > > ETHERNET NOT AUTO SENSE AND IF U WANT AUTOSENSE 10/100 BASE 
> T  GO TO
> > > ANY
> > > > > OTHER ROUTER
> > > > > > ,CHECK THE ROUTER;S MANUAL :)
> > > > > > HOPT IT WILL HELP
> > > > > > IS IT ?
> > > > > >
> > > > > > Turfis wrote:
> > > > > >
> > > > > > > Is the Ethernet AUI port on the 2500 series Cisco routers Full
> > > Duplex
> > > > > > > compatible?  Does it autonegoiate?  Can you hard code the 
> interface
> > > for
> > > > > > > half/full/auto?  Thanks!
> > > > > > >
> > > > > > > _
> > > > > > > FAQ, list archives, and subscription info:
> > > > > http://www.groupstudy.com/list/cisco.html
> > > > > > > Report misconduct and Nondisclosure violations to
> > > [EMAIL PROTECTED]
> > > > > >
> > > > > > _
> > > > > > F

Re: juniper and cisco

[Marty Adkins]

"Howard C. Berkowitz" wrote:
> 
> >The thing is, Juniper's technology is based upon a central bus architecture
> 
>  shared memory, not shared bus.  There is a difference.  I don't
> have the URL handy, but Cisco has a paper out by the Stanford
> University professor who architected the GSR.  It does a nice
> comparison of the three basic architectures, shared bus, shared
> memory, and crossbar.  Shared bus runs out of steam at about 2Gbps,
> and the 7500 is about the highest end Cisco product that uses it.
> Junipers are generally shared memory and GSRs are generally crossbar.

And Catalyst layer 3 forwarders (dare I say routers?) use the shared
memory design, with some added wrinkles for QoS.
(hoping not to get the hair up on the back of Howard's neck re terminology...)
>
>where as the new GSR routers have a processor for each interface card (as
>the Juniper has one central CPU).
>
Rather than get hung up on how many "processors" and what that means, I
prefer to compare them functionally the way Howard has espoused here
before.  There's a path determination function (software in some kind
of processor/CPU) and there's a packet forwarding function.  The latter
can be done by line cards with their own CPUs, line cards with ASICs,
or other hardware-assisted implementations.  Now when an interface flaps
or the path determination function gains or loses a prefix, what happens
and which components are involved?

- Marty

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Re: Fw: BCMSN: VLAN ID How many bits? 10 or 15 ??

[anthony kim]

Sorry, I didn't mean to imply you personally were confused.

Come to think of it, ALL the documentation should be clearer.

Particularly if you think about the 15bits plus the 1bit BPDU field in
the ISL are so close to the 2 bytes in an 802.1q VLAN Identifier header
(3 Priority, 1 CFI, 12 ID)...which was the direction I thought people
were heading towards...




On Wed, Feb 28, 2001 at 03:04:13PM -0800, Gopinath Pulyankote wrote:
>My Q was related to ISL only.  IEEE 802.1q has 12 bits, that's  clear.
>After reading some of the replies, I can summarize ISL's VLAN ID as:
>15 bits are allocated for the field  but only 10 are used now.
>
>"anthony kim" <[EMAIL PROTECTED]> wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>> I think there is some confusion between ISL and IEEE 802.1q.
>> Remember Cisco ISL VLAN ID field is 10 bits i.e. 2^10 or 1024 possible
>> (0-1023)
>>
>> Just *think* about how many bits in an IEEE 802.1q frame it takes to make
>> 4096 VLANs.
>>
>>
>>
>> --- Gopinath Pulyankote <[EMAIL PROTECTED]> wrote:
>> > [Couldn't post this to the newsgroup, hence sending it to you directly]
>> >
>> > "Gopinath Pulyankote" <[EMAIL PROTECTED]> wrote in message news:...
>> > How about this ? This says 10-bit VLAN ID !
>> >
>> >
>> >
>>
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/s
>> > witch_c/xcisl.htm
>> >
>> >  Frame Tagging in ISL
>> >
>> >  With ISL, an Ethernet frame is encapsulated with a header that
>> > transports
>> >  VLAN IDs between switches and routers. A 26-byte header that contains a
>> >  10-bit VLAN ID is prepended to the Ethernet frame.
>> >
>> >  --Gopinath
>> >
>> > > ""Brant Stevens"" <[EMAIL PROTECTED]> wrote in message
>> > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>> > > >
>> > > > Information on ISL header...  taken from
>> > > > http://www.cisco.com/warp/public/741/4.html
>> > > >
>> > > > VLAN - Virtual LAN ID
>> > > > The VLAN field is the virtual LAN ID of the packet. It is a 15-bit
>> > value
>> > > > that is used to distinguish frames on different VLANs. This field is
>> > often
>> > > > referred to as the "color" of the packet.
>> > > >
>> > > > Information on 802.1Q packet... taken from
>> > > >
>> > >
>> >
>>
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
>> > > > t/121t3/dtbridge.htm#xtocid114535
>> > > >
>> > > > The tag is stored in the following two octets and it contains 3 bits
>> > of
>> > > user
>> > > > priority, 1 bit of Canonical Format Identifier (CFI) and 12 bits of
>> > VLAN
>> > > ID
>> > > > (VID). The 3 bits of user priority are used by the standard 802.1p;
>> > and
>> > > the
>> > > > CFI is used for compatibility reasons between Ethernet type networks
>> > and
>> > > > Token Ring type networks. The VID is the identification of the VLAN,
>> > which
>> > > > is basically used by the standard 802.1Q and, being on 12 bits, it
>> > allows
>> > > > the identification of 4096 VLANs.
>> > > >
>> > > >
>> > > > Brant I. Stevens
>> > > > Internetwork Solutions Engineer
>> > > > Thrupoint, Inc.
>> > > > 545 Fifth Avenue, 14th Floor
>> > > > New York, NY. 10017
>> > > > 646-562-6540
>> > > >
>> > > > -Original Message-
>> > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
>> > Of
>> > > > Gopinath Pulyankote
>> > > > Sent: Wednesday, February 28, 2001 1:49 PM
>> > > > To: [EMAIL PROTECTED]
>> > > > Subject: BCMSN: VLAN ID How many bits? 10 or 15 ??
>> > > >
>> > > >
>> > > > Hi all,
>> > > > The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15
>> > bits,
>> > > > but I read somewhere else its 10 bits.
>> > > > Which is correct ??
>> > > > TIA
>> > > > --Gopinath
>> > > >
>> > > >
>> > > > _
>> > > > FAQ, list archives, and subscription info:
>> > > > http://www.groupstudy.com/list/cisco.html
>> > > > Report misconduct and Nondisclosure violations to
>> > [EMAIL PROTECTED]
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>> > > > _
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>> > >
>> >
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Re: what is the average age of people in this stuff?

[Howard C. Berkowitz]

>Jess:
>
>Not to worry, I contacted AARP and was assured we can get a "senior 
>discount" on
>blueberries and no-doze so we can compete with these young 
>whipper-snappers!  :)
>
>Tom Lisa, Instructor, CCNA, CCAI
>Community College of Southern Nevada
>Cisco Regional Networking Academy


You contacted the AppleTalk Address Resolution Protocol?

More seriously, some stereotyping is floating around.  I'm thinking 
of one of the most charismatic, impatient to fools yet committed to 
teaching those willing to learn, and out-of-the-box crazy thinkers 
I've ever met:  Grace Murray Hopper. Gee...I may have met her when 
she wasn't even 70 yet.

I was saddened by an obituary I ran across today:  Claude Shannon. 
Shannon was the father of modern information theory. Shannon died on 
February 24, of Alzheimer's disease...which must have had to work 
very hard to conquer such a mind.   Having passed earlier, but also 
not to be forgotten, was Norbert Wiener.  We throw around the 
buzzword "cyber" so freely these days, but we forget Wiener was the 
person who formally defined "cybernetics."

On a brighter note, involving even older people who are still vidal 
and active,Vint Cerf is the only person that does attend the IETF in 
a three-piece suit, which is treated as an honorary T-shirt.

I can see someone young in years resenting a Dilbert-style manager 
who holds their position by playing corporate games.  But don't leap 
to conclusions -- someone who simply is "older" might very well be 
more technical.

MCI's ads about Generation D thoroughly annoy me, with their talk of 
"Generation D," the first generation that's grown up digital. 
Ummm...take a look at a wonderful book called _The Victorian 
Internet_.  While there is debate about the 1790-ish French semaphore 
system being digital in the modern sense, the Morse telegraph in 1845 
is digital (if you'll include pulse width modulation in the 
definition and had recognizable protocols.   I don't know, offhand, 
when the teletypewriter was invented, but Nyquist's theorems on 
bandwidth were published in 1928.

Depending on how you define "computer" (does it need a stored 
program, or self-modifiable program?), the first digital computer was 
late-1930 (Eckert & Mauchly, and the independent German developer 
whose name escapes me), or around 1950 with Von Neumann machines. 
FORTRAN was available in 1956 or so, admittedly when the head of IBM 
thought there would be a national market for about 6 computers. 
There were packet networks in the early 1970s.

Exactly when did "Generation D" start?

Some of us older folk have been getting better at this for a long, 
long time, and haven't slowed down. Might have changed emphasis.

>
>
>[EMAIL PROTECTED] wrote:
>
>>  Tom:
>>
>>  You are not alone; I just turned 50 on Thursday and am working on 
>>my CCNA and
>>  hope to test in June, then go on for my CCNP.
>>
>>  Regards,
>>
>>  Jess
>  > MCP

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Re: FR + Poison Reverse...

[Howard C. Berkowitz]

>Hey Group,
> I recently pondered something while at work and nobody could give me a
>strait answer. Actually I feel a little embarrassed asking this due to me
>being an NP and I feel like I should know this. Guess this type of thing
>doesn't come up much around me. Question is: Can poison reverse (PR) be used
>with OSPF?

Not as such, but there is a mechanism that can be used with a similar 
effect.  When a router desires to withdraw an LSA it originated, it 
sets the age field to a maximum and refloods it.

>I know split horizon is used with it but I just cant see why/how
>poison reverse would. My definition of PR is that it sets the link to the
>max hop count and deems it unreachable, hence the term poison. I can't see
>how this would work with  OSPF because it doesn't use a hop count. Maybe I'm
>confused about PR. Does it set the link to the highest metric, and not hop
>count? Maybe I'm just used to hearing about PR in discussions of RIP that
>I'm assuming it set the hop count to the highest and has nothing to do with
>metric. Any clarity would help, thanks all...
>
>...sorry for the rambling...

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RE: what is the average age of people in this stuff?

[Howard C. Berkowitz]

>I agree with that point. I work in a company and i always find them saying i
>am not experienced enough. I started of at 17.5 years and i am 22 now. I
>have my cne(4.11 and 5) MCSE(not that it's valid that much), Master
>CNE,CCNA,CCDA,CCNP and CCIE written is almost complete. I have designed and
>implemented networks consisting with upto 20 GSR and 10 6509, and done a lot
>on the troubleshooting area as a testing engineer. I have used equipment
>from smartbits to generate specific protocols traffic and see the network
>effects and much much more. But my manager says that he knows how capable i
>am and only gives me basic paper work like get this signed and finish the
>document etc. If i provide any solution they say i do not understand whats
>going on currently. And can you guess which company this is  look at my
>email address and that should be enough.


It's not clear to me what you mean by paperwork.  Lots of paperwork, 
I agree, has no function other than killing trees.

But a very real requirement in large organizations is to be able to 
communicate your work, your real achievements, to others.  That takes 
oral and written communications, which are real skills that need to 
be honed.

At a fairly early point in my career, I found that there were a lot 
of very interesting problems I wanted to work on, but that were 
sufficiently complex that one person alone could not solve them.  The 
solutions needed teams, so, if I wanted to work on such problems, I 
needed to learn to communicate within teams.  If I wanted to lead 
such teams, I also needed to learn to communicate with people outside 
the team, both orally and in writing.

In no way does the ability to manage and communicate make me less 
technical. It's an additional skill, although I freely admit lots of 
managers give up technical competence in favor of organizational 
skills.  Now, I have no problem saying that I probably don't 
configure routers as fast as I once did, because I don't do it every 
day.  On the other hand, I do less troubleshooting than I once did, 
because I have more thoroughly worked-out designs, and I have decent 
documentation of what went before. The second step I go through in 
tuning an existing network is to get it documented, the first step 
being to understand the perceived problems and goals. The third step 
often is to sort out the differences between perception and reality.

Even in research on new router products, most of my time is not 
hands-on.  No matter how good you are on hands-on skill, your career 
will eventually stall if you can only work as an individual.

>
>Any way i am moving to somewhere where they understand that i am ok and will
>not be doing pure paper work.
>
>Jayesh Patel
>
>-Original Message-
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
>Denis A. Baldwin
>Sent: 26 February 2001 18:32
>To: 'Robert Padjen'; 'Dale Frohman'; 'Mel Chandler PMI'
>Cc: [EMAIL PROTECTED]
>Subject: RE: what is the average age of people in this stuff?
>
>
>I find myself in much of the same situation Dale is in.  At 20, I am busting
>with energy most of the time. I know how to fix the problems and I have the
>desire to, but I often get the "you're not old enough and experienced
>enough" excuse from people who haven't seen my work.  A lot of people assume
>that experience and ability comes with age. I agree with that point to a
>degree.  However, I know a lot of teenagers who are brilliant and a lot of
>people in their 40s who don't have sense enough to get out of the rain. :-)
>
>Denis
>
>
>Denis A. Baldwin - Network Administrator
>A+ / Network + / I-Net+ / MCP
>
>
>-Original Message-
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
>Robert Padjen
>Sent: Monday, February 26, 2001 1:17 PM
>To: Dale Frohman; Mel Chandler PMI
>Cc: [EMAIL PROTECTED]
>Subject: RE: what is the average age of people in this stuff?
>
>
>Contrary to Mr. Reagan, sometimes youth is a positive.
>I have two years on Mel, and I'm just finally getting
>out of the 'you're so young...' Govern your enthusiasm
>and impatience in meetings and kick (*$.
>
>
>--- Dale Frohman <[EMAIL PROTECTED]> wrote:
>>  If they think you are young, they will probably
>>  think I am still a baby
>>  being only 19.  I have my CCNA, 1/4 CCNP and
>>  actively seeking MCSE 2k.  I
>>  also have an AA degree and also seeking my bachelor
>>  degree in computer
>>  science.  I plan on getting my CCIE within the next
>>  few years.  I have
>>  worked with an internet company for more than three
>>  years now.  I have
>>  been told that I am impatient and immature, but I am
>>  not one to just sit
>>  around.  If anyone can help me dispel some of these
>>  notions I would be
>>  greatly thankful.  Also if someone veterans can give
>>  some pointers/tips on
>>  how to make it in this industry, that would also be
>>  helpful.  I hope all
>>  this hard work pays off!
>>
>>  Dale
>>
>>
>>  On Mon, 26 Feb 2001, Mel Chandler PMI wro

RE: juniper and cisco

[Howard C. Berkowitz]

>Here are some interesting links
>
>
>http://newsroom.cisco.com/dlls/corp_022201.html
>
>http://www.cisco.com/warp/customer/cc/pd/rt/12000/12416/prodlit/itro_ds.htm
>
>http://www.cisco.com/warp/customer/cc/pd/ifaa/oc192/prodlit/cc19_ds.htm
>
>
>The thing is, Juniper's technology is based upon a central bus architecture


 shared memory, not shared bus.  There is a difference.  I don't 
have the URL handy, but Cisco has a paper out by the Stanford 
University professor who architected the GSR.  It does a nice 
comparison of the three basic architectures, shared bus, shared 
memory, and crossbar.  Shared bus runs out of steam at about 2Gbps, 
and the 7500 is about the highest end Cisco product that uses it. 
Junipers are generally shared memory and GSRs are generally crossbar.

>
>where as the new GSR routers have a processor for each interface card (as
>the Juniper has one central CPU).
>
>I've seen many tests as where the Juniper routers experience a lot of packet
>loss and a decrease in performance and reliability when the node is fully
>configured with a complete set of cards.  Each time a card is removed or
>added, there is downtime with traffic interruptions with the Juniper router
>trying to "catch up" with the changes.  If you talk with the Engineers at
>Juniper, they will tell you that scalability is their biggest problem with
>their M series routers.  You can run with a few, but they won't scale and
>you're not able to run a huge network with them without running into major
>problems.

Historically, Junipers have central problems and Ciscos have 
distributed problems.  "Nobody is prefect."

>
>The GSRs run the same as if they had only one interface card or if they are
>completely filled with interface cards.  Each interface card is managed by
>its own processor so it all runs independent of each other.

True for the forwarding plane, but, in both products, the 
control/path determination plane is still single processor.  Might or 
might not be a limitation, depending on the situation.

>
>Another downfall of the Juniper routers is that an interface card for an
>M160 Juniper router will not work on another Juniper router.  For Cisco
>equipment (like most other Cisco products as well...), a card that works
>with one 12416 GSR Router will work on another 12xxx one without any
>problems.  Cisco has already tried to keep the interoperability of equipment
>and hardwarre, so that is always nice.  You can also upgrade the lower end
>GSRs to the new 12416 hardware also.  Juniper's stuff is all individual
>hardware specific.

There's no clean answer here.  At some point, maintaining backwards 
compatibility and "investment protection" means that you have to 
support a less efficient way of doing things that you can do better 
with new technology.

>
>It's very much true that Juniper owns 30% of the Enterprise market share and
>that they were the first to come out with the fastest routers, but since
>Cisco has released their new GSR routers...they aren't the only ones
>anymore.  And plus it's also true that Cisco was late coming into this
>space, but I think with Cisco's standard of having high quality and control
>procedures, was definitely worth the wait.

Cisco also has the baggage of complexity and support for a large 
number of IOS features that are irrelevant to ISP operations.  Take 
them out, and you simplify the code and make it easier to test.  But 
you now are supporting a significantly different code base.

JunOS was built only to support ISP operations.

The bottom line is that each customer needs to make a case-by-case 
decision.  Hopefully, customers that need products in this 
performance range have significant clue for making decisions.

I'll freely admit that I haven't measured the latest products versus 
one another, but raw best-case forwarding speed is not the only 
appropriate selection criterion.  There isn't only one.

Other criteria include forwarding rates when packet filtering or 
traffic shaping are in effect.  Convergence time is yet another 
factor -- see my http://draft-berkowitz-bgpcon-00.txt, or, even 
better, the multi-authored next draft 
http://draft-berkowitz-bgpcon-01.txt, which should be online sometime 
next wek.\\el

>I know tons of loyal Cisco
>powered ISPs were waiting for this breakthrough as well.
>
>But I have to admit, Juniper does make some good stuff too (Lots of ex-Cisco
>employees migrated over to Juniper to work there).  But I'm partial to Cisco
>and their equipment but I just wanted to help point out that Juniper is no
longer the only one that makes the fastest routers.  =)

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RE: Private Internet Addressing

[Howard C. Berkowitz]

>On Mon, 26 Feb 2001, Leigh Anne Chisholm wrote:
>
>>  Where I'm located, it seems that "major" ISP's are being bought
>>  left-right-and-center.  I would think that with some of the
>>  acquisitions that have been made, what could have been a simple
>>  "merging" of networks would get a little ugly, trying to remove the
>>  duplicate "private internet addressing" routes from all the providers,
>>  replacing these configurations with new addressing schemes.
>>
>>  Or am I still missing the boat?  (-:


Brian Feeny wrote,

>
>This is common in both Enterprise and ISP situations.  NAT can be made to
>deal with this.  When two networks have duplicate private addressing, you
>can use NAT to remedy this.


Specifically, double NAT, where each former enterprise maps into a 
private DMZ, so translations between the enterprises do not require 
coordination between them, just with the NAT administrator.

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Re: Private Internet Addressing

[Howard C. Berkowitz]

>Brian <[EMAIL PROTECTED]> wrote,



>On Mon, 26 Feb 2001, Bradley J. Wilson wrote:
>
>>  ElephantChild wrote:
>>
>>  RFC 1918, section 3:
>>
>>"[...]Because private addresses have no global meaning, routing
>>  information
>> about private networks shall not be propagated on inter-enterprise
>> links, *and packets with private source or destination addresses
>> should not be forwarded across such links.*"
>>
>>  ...But that's not what's happening in the case of the traceroute which
>>  started this discussion.  The only reason we're seeing those private
>>  addresses is because we're basically snooping around in someone else's
>>  network.  RFC 1918 is still being upheld - privately-addressed traffic is
>>  not being forwarded over inter-enterprise links.
>
>and the packets being sourced or destined are not being done from rfc1918
>space, just passing thru it.

While what you say is true about the "forward path," onto which I 
send normal traffic or the UDP probes of traceroute, the ICMP 
TTL-exceeded responses that define the traceroute responses have the 
source address of the router interfaces that generated them.  If 
these interfaces are RFC1918 numbered, and the address originating 
the traceroute is in registered space, there become only two 
alternatives:

  1.  Packets with RFC1918 source addresses have to enter registered space
  2.  There will be no response to the traceroute.

>
>>
>>  The difference is this: "information about private networks shall not be
>>  *propogated*"...meaning my routers must not actively advertise my private
>>  networks to external ASes.  Well, okay - the ISP isn't doing that.  But when
>>  we trace through a network using private addresses, we will see them - we're
>>  snooping around, but the routers aren't actively propogating those private
>  > numbers.

As best as I can see, you would want a "hole" put through the RFC 
2827 ingress filtering filters (or equivalents with reverse path 
verification), which state that Best Current Practice is to block any 
packet sourced from an address to which you have no active route.

To open an exception for ICMP, without maintaining state that you 
have issued a traceroute, is an open invitation for denial of service 
attack.  To keep state that you have issued a traceroute, you impose 
a significant performance hit on the routers involve.

Even if I could implement all these special cases, the reality 
remains that more than one provider in the path could use the same 
RFC1918 address, and I now have accurate traceroute results that are 
utterly confusing and indistinguishable from traceroutes of looping 
paths.

>  >
>>  I'm excited about IPv6...but if we can make v4 last a little while longer,
>>  hey, let's do it. ;-)
>>
>  > BJ

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Re: OSPF design question re: location of Area Border Router

[Howard C. Berkowitz]

>Got it!  Because of my lack of experience with OSPF, the original
>question confused me until I thought through the configuration.  Until
>then, I still thought of routers or interfaces belonging to areas.  What
>really helped me to conceptualize this issue was to toss out that idea
>and think of only *links* as belonging to areas.

Yep.  There are several subtleties to this, until you really get an 
emotional understanding of "link."  The idea that a router link 
(i.e., type 1 LSA) is different than a physical router, and that it 
can involve such weirdnesses as being a router link in each area to 
which the physical router (or the OSPF process) connects.

Warnings though:  OSPF and ISIS look at things a little differently. 
In OSPF, it is the interfaces of the single router that go into 
different areas. In OSPF, it is more the concept of the physical 
router being aware of its own area alone (i.e., type 1) or of other 
areas and the backbone (type 2).

My new white paper on certificationzone.com, which should be up 
tomorrow, compares link state protocols and scalable routing in 
general.  A set of OSPF and ISIS specific papers will follow.

>
>Put into context,  I realized that given the original situation, the
>link between the two routers would either be in area 0 or in area 1
>depending on the configuration.  I know, most people probably already
>understood that, but for some reason I just hadn't thought of it that
>way before. 
>
>Thanks for the clarification,
>John
>
  "Howard C. Berkowitz" <[EMAIL PROTECTED]> 2/28/01 3:01:58 PM >>>
>I haven't seen any of my posts show up for about a day or two -- not
>sure they are getting through.  Feel free to post this since yours,
>clearly are!  I'll copy to groupstudy just in case my posts start to
>work.
>
>
>>I think I must be missing something here, or I don't understand the
>>concept of ABR.
>>
>>If you have a 7513 in area 0 connected to a 4500 in area 1, for
>>instance, then the 4500 will have one interface in area0 and the rest
>>presumably in area 1.  By definition, that makes the 4500 an ABR,
>>doesn't it?
>
>Yes.
>
>>I don't see how you have any choice in this matter at all,
>>but since I've never actually configured OSPF perhaps someone will
>>enlighten me.
>
>In the situation described, the choice -- which I often like to do --
>is not to put any area interfaces on the 4500.
>
>Assume the 4500 is in area 0.0.0.1, and the WAN link to the core is
>192.168.0.0/30.  There's another 4500 in area 0.0.0.2, with a WAN
>link, 192.168.1.0/30.
>
>Then, a configuration snippet for the 7513 might be:
>
>int s0.1
>ip addr 192.168.0.1 255.255.255.252
>int s0.2
>ip addr 192.168.1.1 255.255.255.252
>int fe0
>ip addr 172.16.0.1 255.255.255.0
>
>router ospf 1
>network 192.168.0.1 0.0.0.0 area 0.0.0.1
>network 192.168.1.1 0.0.0.0 area 0.0.0.2
>network 172.16.0.1  0.0.0.0 area 0.0.0.0
>
>In this example, I deliberately put area 0.0.0.0 on a Fast Ethernet.
>Often, I keep 0.0.0.0 very small.  If I have redundant core routers,
>I'll connect them to switch ports on a common subnet.  I'll usually
>connect infrastructure servers such as SNMP, DNS, and DHCP to that
>subnet, but I avoid putting any application servers into it.
>
>Even if the core routers are colocated at the same site as the
>application servers, I'm quite prone to put the servers in their own
>area.  One of the advantages of doing so is keeping server-to-server
>traffic, such as synchronization and backup, out of the core.
>
>>
>   "Hennen, David" <[EMAIL PROTECTED]> 2/28/01 9:32:59 AM >>>
>>Hi, I am preparing to bring up a new site in an ospf network.  The
>new
>>site
>>will be a training facility connected back to the main office by a
>t1.
>>Currently we use OSPF and have everything in area 0, around 100
>>routers.
>>
>>I want to make this new site a different area and to make the new
>area
>>a
>>Totally Stubby Area.  We have two 7513 routers at the main office
>that
>>handle all the wan traffic, the new remote office would connect to
>one
>>of
>>these.  The remote training office will have a 4500.
>>
>>One of my coworkers suggested that the 7513 at the main office should
>>be the
>>Area Border Router, because we should keep area 0 from being spread
>out
>>over
>>a bunch of wan links.  I had it in mind that the remote 4500 should
>be
>>the
>>ABR.  I don't have a strong reason for thinking that way.  The cpu of
>>the
>>7513 runs between 20-30 % utilization according to snmp info.
>>
>>Are there any rules of thumb regarding this?  I looked through the
>>Cisco
>>OSPF network design book and can see some examples that support
>having
>>the
>>ABR at the main office.  Is that the accepted practice?  Are there
>any
>>gotcha's to look out for?
>>
>>Thanks if you can help
>>dave h
>>
>>_
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>
>>
>>
>>
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Re: 2500 series e0 fullduplex?

[Tony van Ree]

Hi,

It seems to have been said a number of different ways but 100Meg can be set to full or 
half duplex,  10Meg can be set to full or half duplex.  There is however a requirement 
that is the the hardware must be able to support both the speed and the duplex 
settings.

Ethernet in the true sense can only be 10Meg Half duplex on thick coax cable.  The 
IEEE committee however have other standrds 10BaseT can be 10Meg half or full duplex. 
100BaseT can be 100Meg half or full duplex.  They also have several others such as 
10Base5 (thick coax) 10Meg being coax, shared, only one Transmit/Receive circuit must 
be half duplex. 10Base2 (thin coax) same as thick re duplex etc.  There are also 
several others basically the same rules as 100BaseT when it comes to duplex.

Most modern day devices allow 10/100Meg half or full duplex this allows legacy systems 
to interoperate.  Coax has be written out of the standards.

There are however heaps of devices that still only have 10Meg Half duplex ports.  They 
must and can only be used at 10Meg Half Duplex end of story for them.  The 2500 series 
routers are quite old (not compared to me but more than 3 years is common).  The 
earlier ones were released prior to 100BaseT being available.  

Just some thoughts

Teunis,
Hobart, Tasmania
Asutralia


On Thursday, March 01, 2001 at 03:58:18 AM, SAIF wrote:

> well its not a terminology thing u see its understood when u use 100mbps its then not
> csma/cd ethernet thing ,they made it like thre will be no collisions and speed will 
>be
> 10 times than 10 mbps
> yes u r right on 36xx router there is full/half/auto duplex but u didnt get the idea
> ,its basically technology which is sensing which media is supported to that interface
> ,if it is 10mbps then interface will make it half duplex ethernet and i it is 
>100mbs
> it will make it fast ethernet full duplex and u have choice to make it half/full 
>duplex
> by ur choice according to ur existing medium and toplogy
> THAT PORT MUST BE NOT A FASTETHERNET PORT  BUT IT CAN BE IF U USE IT IN 100MBPS WAY
> THERE IS ANOTHER THING YES IT IS POSSIBL I AGREE U CAN WORK 10BASE T  (ONLY NOT
> COAXIAL) WITH FULL DUPLEX BUT THE THING IS THAT WHAT I WAS POINTING THAT CISCO 
>PRODUCTS
> USUALLY DONT SUPPORTFULL DUPLEX WITH 10MBPS
> AM I WRONG ?
> 
> Neil Schneider wrote:
> 
> > Sorry but you are incorrect.  (unless we just have a terminology difference
> > here) Just becuase you are running 100mbps. it is not automatically full
> > duplex.  the Fastethernet ports on routers (3640 seriesfor example) can be
> > set to full/half/auto duplex.  why bother with a half duplex setting if all
> > fastethernet is full duplex?
> >
> > --
> > Neil Schneider
> > MCT  MCSE  CCSI  CCNP
> >
> > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > 100mbps is not ethernet be sure its fast ethernet ,also their is no
> > collisions in fast
> > > ethernet ,its colliision free and this is only possible if u have one way
> > to send and
> > > one way to recieve data simultaneously :) i am sure u got the idea
> > > secondly in ethernet there are collisions and if there are colliisions
> > Can u use one to
> > > send and one way to recieve simultaneously with collisions so if u cant
> > the result is
> > > ethernet works in half duplex mode and fast ethernnet works in full duplex
> > > if u have any thing different than me plz share with us
> > > waiting ur reply
> > > Saif
> > >
> > > Neil Schneider wrote:
> > >
> > > > It is NOT true that ethernet is half and fastethernet is full duplex.
> > > > Either 10Mbps or 100Mbps ehternet can be run in half or full duplex
> > mode.
> > > > And offhand I don't know if the 2500 AUI port will do full ethernet.
> > > >
> > > > --
> > > > Neil Schneider
> > > > MCT  MCSE  CCSI  CCNP
> > > >
> > > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > > NO ITS ETHERNET PORT AND WORKING HALF DUPLEX ONLY ,U SEE CISCO GIVES
> > > > FASTETHERNET PORTS
> > > > > SPECIALLY IN THEIR ROUTERS SPECIALLY IN 4XXX SERIES AND U KNOW
> > ETHERNET
> > > > WORKS IN HALF
> > > > > DUPLEX AND FASTETHERNET WORKS IN FULL DUPLEX  SO THE RESULT IS AUI
> > PORT IS
> > > > HALF DUPLEX
> > > > > ETHERNET NOT AUTO SENSE AND IF U WANT AUTOSENSE 10/100 BASE T  GO TO
> > ANY
> > > > OTHER ROUTER
> > > > > ,CHECK THE ROUTER;S MANUAL :)
> > > > > HOPT IT WILL HELP
> > > > > IS IT ?
> > > > >
> > > > > Turfis wrote:
> > > > >
> > > > > > Is the Ethernet AUI port on the 2500 series Cisco routers Full
> > Duplex
> > > > > > compatible?  Does it autonegoiate?  Can you hard code the interface
> > for
> > > > > > half/full/auto?  Thanks!
> > > > > >
> > > > > > _
> > > > > > FAQ, list archives, and subscription info:
> > > > http://www.groupstudy.com/list/cisco.html
> > > > > > Report misconduct and Nondisclosure violations to
> > [EMAIL PROTECTED]
> > > > >
> > > > > __

Re: 2500 series e0 fullduplex?

[Tony van Ree]

Hi,

It seems to have been said a number of different ways but 100Meg can be set to full or 
half duplex,  10Meg can be set to full or half duplex.  There is however a requirement 
that is the the hardware must be able to support both the speed and the duplex 
settings.

Ethernet in the true sense can only be 10Meg Half duplex on thick coax cable.  The 
IEEE committee however have other standrds 10BaseT can be 10Meg half or full duplex. 
100BaseT can be 100Meg half or full duplex.  They also have several others such as 
10Base5 (thick coax) 10Meg being coax, shared, only one Transmit/Receive circuit must 
be half duplex. 10Base2 (thin coax) same as thick re duplex etc.  There are also 
several others basically the same rules as 100BaseT when it comes to duplex.

Most modern day devices allow 10/100Meg half or full duplex this allows legacy systems 
to interoperate.  Coax has be written out of the standards.

There are however heaps of devices that still only have 10Meg Half duplex ports.  They 
must and can only be used at 10Meg Half Duplex end of story for them.  The 2500 series 
routers are quite old (not compared to me but more than 3 years is common).  The 
earlier ones were released prior to 100BaseT being available.  

Just some thoughts

Teunis,
Hobart, Tasmania
Asutralia



On Thursday, March 01, 2001 at 03:58:18 AM, SAIF wrote:

> well its not a terminology thing u see its understood when u use 100mbps its then not
> csma/cd ethernet thing ,they made it like thre will be no collisions and speed will 
>be
> 10 times than 10 mbps
> yes u r right on 36xx router there is full/half/auto duplex but u didnt get the idea
> ,its basically technology which is sensing which media is supported to that interface
> ,if it is 10mbps then interface will make it half duplex ethernet and i it is 
>100mbs
> it will make it fast ethernet full duplex and u have choice to make it half/full 
>duplex
> by ur choice according to ur existing medium and toplogy
> THAT PORT MUST BE NOT A FASTETHERNET PORT  BUT IT CAN BE IF U USE IT IN 100MBPS WAY
> THERE IS ANOTHER THING YES IT IS POSSIBL I AGREE U CAN WORK 10BASE T  (ONLY NOT
> COAXIAL) WITH FULL DUPLEX BUT THE THING IS THAT WHAT I WAS POINTING THAT CISCO 
>PRODUCTS
> USUALLY DONT SUPPORTFULL DUPLEX WITH 10MBPS
> AM I WRONG ?
> 
> Neil Schneider wrote:
> 
> > Sorry but you are incorrect.  (unless we just have a terminology difference
> > here) Just becuase you are running 100mbps. it is not automatically full
> > duplex.  the Fastethernet ports on routers (3640 seriesfor example) can be
> > set to full/half/auto duplex.  why bother with a half duplex setting if all
> > fastethernet is full duplex?
> >
> > --
> > Neil Schneider
> > MCT  MCSE  CCSI  CCNP
> >
> > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > 100mbps is not ethernet be sure its fast ethernet ,also their is no
> > collisions in fast
> > > ethernet ,its colliision free and this is only possible if u have one way
> > to send and
> > > one way to recieve data simultaneously :) i am sure u got the idea
> > > secondly in ethernet there are collisions and if there are colliisions
> > Can u use one to
> > > send and one way to recieve simultaneously with collisions so if u cant
> > the result is
> > > ethernet works in half duplex mode and fast ethernnet works in full duplex
> > > if u have any thing different than me plz share with us
> > > waiting ur reply
> > > Saif
> > >
> > > Neil Schneider wrote:
> > >
> > > > It is NOT true that ethernet is half and fastethernet is full duplex.
> > > > Either 10Mbps or 100Mbps ehternet can be run in half or full duplex
> > mode.
> > > > And offhand I don't know if the 2500 AUI port will do full ethernet.
> > > >
> > > > --
> > > > Neil Schneider
> > > > MCT  MCSE  CCSI  CCNP
> > > >
> > > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > > NO ITS ETHERNET PORT AND WORKING HALF DUPLEX ONLY ,U SEE CISCO GIVES
> > > > FASTETHERNET PORTS
> > > > > SPECIALLY IN THEIR ROUTERS SPECIALLY IN 4XXX SERIES AND U KNOW
> > ETHERNET
> > > > WORKS IN HALF
> > > > > DUPLEX AND FASTETHERNET WORKS IN FULL DUPLEX  SO THE RESULT IS AUI
> > PORT IS
> > > > HALF DUPLEX
> > > > > ETHERNET NOT AUTO SENSE AND IF U WANT AUTOSENSE 10/100 BASE T  GO TO
> > ANY
> > > > OTHER ROUTER
> > > > > ,CHECK THE ROUTER;S MANUAL :)
> > > > > HOPT IT WILL HELP
> > > > > IS IT ?
> > > > >
> > > > > Turfis wrote:
> > > > >
> > > > > > Is the Ethernet AUI port on the 2500 series Cisco routers Full
> > Duplex
> > > > > > compatible?  Does it autonegoiate?  Can you hard code the interface
> > for
> > > > > > half/full/auto?  Thanks!
> > > > > >
> > > > > > _
> > > > > > FAQ, list archives, and subscription info:
> > > > http://www.groupstudy.com/list/cisco.html
> > > > > > Report misconduct and Nondisclosure violations to
> > [EMAIL PROTECTED]
> > > > >
> > > > > _

Re: quick way to clear config totally

[Gregg Green]

bah, too much typing.

#wr e
#rel

that's IP Plus, enterprise may have other goofy options that will result
in an "% Ambi command..."


On Wed, 28 Feb 2001, John Neiberger wrote:

> >From privileged mode:
> 
> #erase startup-config
> #reload
> 
> >>> "Christopher Kolp" <[EMAIL PROTECTED]> 2/28/01 3:21:46 PM
> >>>
> Is there a quick way to clear the entire config of a router?
> 
> "setup" doesn't kill everything and I don't have the IOS to re-flash.
> 
> any help is greatly appreciated since every way I've tried just
> doesn't
> take away everything, ie. access lists, etc...
> 
> Thanks!!!
> 
> Sincerely,
> 
> Chris Kolp, CCNA
> Systems Engineer
> Neuron Broadcasting Technologies
> 
> _
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html 
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> 
> 
> 
> _
> FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> 


Gregg Green IHETS
Senior Network Engineer[EMAIL PROTECTED]

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Re: 2500 series e0 fullduplex?

[Eric Fairfield]

100 Mb FE still falls under CSMA/CD rules especially when using a Fast
Ethernet Hub that doesn't support Full duplex.  There can and will be
collisions at 100Mb Fast Ethernet in a shared environment.

--
Eric Fairfield
CCIE #6413



"SAIF" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> well its not a terminology thing u see its understood when u use 100mbps
its then not
> csma/cd ethernet thing ,they made it like thre will be no collisions and
speed will be
> 10 times than 10 mbps
> yes u r right on 36xx router there is full/half/auto duplex but u didnt
get the idea
> ,its basically technology which is sensing which media is supported to
that interface
> ,if it is 10mbps then interface will make it half duplex ethernet and
i it is 100mbs
> it will make it fast ethernet full duplex and u have choice to make it
half/full duplex
> by ur choice according to ur existing medium and toplogy
> THAT PORT MUST BE NOT A FASTETHERNET PORT  BUT IT CAN BE IF U USE IT IN
100MBPS WAY
> THERE IS ANOTHER THING YES IT IS POSSIBL I AGREE U CAN WORK 10BASE T
(ONLY NOT
> COAXIAL) WITH FULL DUPLEX BUT THE THING IS THAT WHAT I WAS POINTING THAT
CISCO PRODUCTS
> USUALLY DONT SUPPORTFULL DUPLEX WITH 10MBPS
> AM I WRONG ?
>
> Neil Schneider wrote:
>
> > Sorry but you are incorrect.  (unless we just have a terminology
difference
> > here) Just becuase you are running 100mbps. it is not automatically full
> > duplex.  the Fastethernet ports on routers (3640 seriesfor example) can
be
> > set to full/half/auto duplex.  why bother with a half duplex setting if
all
> > fastethernet is full duplex?
> >
> > --
> > Neil Schneider
> > MCT  MCSE  CCSI  CCNP
> >
> > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > 100mbps is not ethernet be sure its fast ethernet ,also their is no
> > collisions in fast
> > > ethernet ,its colliision free and this is only possible if u have one
way
> > to send and
> > > one way to recieve data simultaneously :) i am sure u got the idea
> > > secondly in ethernet there are collisions and if there are colliisions
> > Can u use one to
> > > send and one way to recieve simultaneously with collisions so if u
cant
> > the result is
> > > ethernet works in half duplex mode and fast ethernnet works in full
duplex
> > > if u have any thing different than me plz share with us
> > > waiting ur reply
> > > Saif
> > >
> > > Neil Schneider wrote:
> > >
> > > > It is NOT true that ethernet is half and fastethernet is full
duplex.
> > > > Either 10Mbps or 100Mbps ehternet can be run in half or full duplex
> > mode.
> > > > And offhand I don't know if the 2500 AUI port will do full ethernet.
> > > >
> > > > --
> > > > Neil Schneider
> > > > MCT  MCSE  CCSI  CCNP
> > > >
> > > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > > NO ITS ETHERNET PORT AND WORKING HALF DUPLEX ONLY ,U SEE CISCO
GIVES
> > > > FASTETHERNET PORTS
> > > > > SPECIALLY IN THEIR ROUTERS SPECIALLY IN 4XXX SERIES AND U KNOW
> > ETHERNET
> > > > WORKS IN HALF
> > > > > DUPLEX AND FASTETHERNET WORKS IN FULL DUPLEX  SO THE RESULT IS AUI
> > PORT IS
> > > > HALF DUPLEX
> > > > > ETHERNET NOT AUTO SENSE AND IF U WANT AUTOSENSE 10/100 BASE T  GO
TO
> > ANY
> > > > OTHER ROUTER
> > > > > ,CHECK THE ROUTER;S MANUAL :)
> > > > > HOPT IT WILL HELP
> > > > > IS IT ?
> > > > >
> > > > > Turfis wrote:
> > > > >
> > > > > > Is the Ethernet AUI port on the 2500 series Cisco routers Full
> > Duplex
> > > > > > compatible?  Does it autonegoiate?  Can you hard code the
interface
> > for
> > > > > > half/full/auto?  Thanks!
> > > > > >
> > > > > > _
> > > > > > FAQ, list archives, and subscription info:
> > > > http://www.groupstudy.com/list/cisco.html
> > > > > > Report misconduct and Nondisclosure violations to
> > [EMAIL PROTECTED]
> > > > >
> > > > > _
> > > > > FAQ, list archives, and subscription info:
> > > > http://www.groupstudy.com/list/cisco.html
> > > > > Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
> > > > >
> > > >
> > > > _
> > > > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > > > Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
> > >
> > > _
> > > FAQ, list archives, and subscription info:
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> > >
> >
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Re: computer networking degree

[Bradley J. Wilson]

Okay, but let's look at this in financial terms: you get your CCIE, and sign
on to some six-figure job doing whatever.  What does the MS on top of that
gain you?

Is there anyone on the list who's had *firsthand* experience gaining an MS
after getting their CCIE, and if so, what the percentage gain in their
salary was?


- Original Message -
From: Michael Linehan
To: steve billy ; CiscoStudyGroup
Sent: Wednesday, February 28, 2001 5:02 PM
Subject: Re: computer networking degree


Steve,

You can earn a BS in Information Technology with a Network Technology
concentration from
Capella University. This can be done online without having to personally
attend one
class. You can find Capella online at

www.capellauniversity.edu

P.S. I am currently enrolled for spring quarter and have received very good
recommendations from other people.

Mike Linehan

steve billy wrote:

> Hi group,
>
> Can you please tell me good universities from where
> one can obtain degree at the undergraduate and
> graduate level in computer networking (specifically).
>
> Thanks
> Steve


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Re: 2500 series e0 fullduplex?

[Priscilla Oppenheimer]

Your message is probably being routed to the null interface for most of us 
because it's not comprehensible. Please use sentences, punctuation, and 
full words, i.e. "you" instead of "u." Please don't use all caps, though 
please do capitalize the first letter of a sentence. Those are the de facto 
protocols that we have generally agreed on in this forum to increase 
communications. I know I probably sound like a school teacher, but I am 
serious. We need these protocols in order to communicate effectively. 
Thank-you.

Priscilla

At 03:58 AM 3/1/01, SAIF wrote:
>well its not a terminology thing u see its understood when u use 100mbps 
>its then not
>csma/cd ethernet thing ,they made it like thre will be no collisions and 
>speed will be
>10 times than 10 mbps
>yes u r right on 36xx router there is full/half/auto duplex but u didnt 
>get the idea
>,its basically technology which is sensing which media is supported to 
>that interface
>,if it is 10mbps then interface will make it half duplex ethernet and 
>i it is 100mbs
>it will make it fast ethernet full duplex and u have choice to make it 
>half/full duplex
>by ur choice according to ur existing medium and toplogy
>THAT PORT MUST BE NOT A FASTETHERNET PORT  BUT IT CAN BE IF U USE IT IN 
>100MBPS WAY
>THERE IS ANOTHER THING YES IT IS POSSIBL I AGREE U CAN WORK 10BASE 
>T  (ONLY NOT
>COAXIAL) WITH FULL DUPLEX BUT THE THING IS THAT WHAT I WAS POINTING THAT 
>CISCO PRODUCTS
>USUALLY DONT SUPPORTFULL DUPLEX WITH 10MBPS
>AM I WRONG ?
>
>Neil Schneider wrote:
>
> > Sorry but you are incorrect.  (unless we just have a terminology difference
> > here) Just becuase you are running 100mbps. it is not automatically full
> > duplex.  the Fastethernet ports on routers (3640 seriesfor example) can be
> > set to full/half/auto duplex.  why bother with a half duplex setting if all
> > fastethernet is full duplex?
> >
> > --
> > Neil Schneider
> > MCT  MCSE  CCSI  CCNP
> >
> > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > 100mbps is not ethernet be sure its fast ethernet ,also their is no
> > collisions in fast
> > > ethernet ,its colliision free and this is only possible if u have one way
> > to send and
> > > one way to recieve data simultaneously :) i am sure u got the idea
> > > secondly in ethernet there are collisions and if there are colliisions
> > Can u use one to
> > > send and one way to recieve simultaneously with collisions so if u cant
> > the result is
> > > ethernet works in half duplex mode and fast ethernnet works in full 
> duplex
> > > if u have any thing different than me plz share with us
> > > waiting ur reply
> > > Saif
> > >
> > > Neil Schneider wrote:
> > >
> > > > It is NOT true that ethernet is half and fastethernet is full duplex.
> > > > Either 10Mbps or 100Mbps ehternet can be run in half or full duplex
> > mode.
> > > > And offhand I don't know if the 2500 AUI port will do full ethernet.
> > > >
> > > > --
> > > > Neil Schneider
> > > > MCT  MCSE  CCSI  CCNP
> > > >
> > > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > > NO ITS ETHERNET PORT AND WORKING HALF DUPLEX ONLY ,U SEE CISCO GIVES
> > > > FASTETHERNET PORTS
> > > > > SPECIALLY IN THEIR ROUTERS SPECIALLY IN 4XXX SERIES AND U KNOW
> > ETHERNET
> > > > WORKS IN HALF
> > > > > DUPLEX AND FASTETHERNET WORKS IN FULL DUPLEX  SO THE RESULT IS AUI
> > PORT IS
> > > > HALF DUPLEX
> > > > > ETHERNET NOT AUTO SENSE AND IF U WANT AUTOSENSE 10/100 BASE T  GO TO
> > ANY
> > > > OTHER ROUTER
> > > > > ,CHECK THE ROUTER;S MANUAL :)
> > > > > HOPT IT WILL HELP
> > > > > IS IT ?
> > > > >
> > > > > Turfis wrote:
> > > > >
> > > > > > Is the Ethernet AUI port on the 2500 series Cisco routers Full
> > Duplex
> > > > > > compatible?  Does it autonegoiate?  Can you hard code the interface
> > for
> > > > > > half/full/auto?  Thanks!
> > > > > >
> > > > > > _
> > > > > > FAQ, list archives, and subscription info:
> > > > http://www.groupstudy.com/list/cisco.html
> > > > > > Report misconduct and Nondisclosure violations to
> > [EMAIL PROTECTED]
> > > > >
> > > > > _
> > > > > FAQ, list archives, and subscription info:
> > > > http://www.groupstudy.com/list/cisco.html
> > > > > Report misconduct and Nondisclosure violations to 
> [EMAIL PROTECTED]
> > > > >
> > > >
> > > > _
> > > > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > >
> > > _
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> > >
> >
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Re: Training on switches.

[Larry Lamb]

Building Cisco Multilayer Switch Networks by Cisco Press is what I used to
learn the Set/IOS based switches.

Heckle wrote in message <[EMAIL PROTECTED]>...
>I am trying to find  aresource to get some training on Cisco Switches
>(2900's thru 5500's) for some people at work. Something on CD would be
>best. Perhaps something like  Learneky offers. Can anyone mak eany
>sugegstions?
>
>_
>FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>


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Re: quick way to clear config totally

[Craig Columbus]

240V to the E0 interface. ;-)

Craig

At 05:21 PM 2/28/2001 -0500, you wrote:
>Is there a quick way to clear the entire config of a router?
>
>"setup" doesn't kill everything and I don't have the IOS to re-flash.
>
>any help is greatly appreciated since every way I've tried just doesn't
>take away everything, ie. access lists, etc...
>
>Thanks!!!
>
>Sincerely,
>
>Chris Kolp, CCNA
>Systems Engineer
>Neuron Broadcasting Technologies
>
>_
>FAQ, list archives, and subscription info: 
>http://www.groupstudy.com/list/cisco.html
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Re: quick way to clear config totally

[Circusnuts]

Write Erase, Reload...  it is the Cisco cure-all

Phil

- Original Message -
From: "Kelly D Griffin" <[EMAIL PROTECTED]>
To: "Christopher Kolp" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Wednesday, February 28, 2001 8:36 PM
Subject: Re: quick way to clear config totally


> write erase from the enable prompt.
>
> Kelly D Griffin, CCNA, CCDA
> Network Engineer
> Kg2 Network Design
> http://www.kg2.com
>
>
> - Original Message -
> From: "Christopher Kolp" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Wednesday, February 28, 2001 4:21 PM
> Subject: quick way to clear config totally
>
>
> > Is there a quick way to clear the entire config of a router?
> >
> > "setup" doesn't kill everything and I don't have the IOS to re-flash.
> >
> > any help is greatly appreciated since every way I've tried just doesn't
> > take away everything, ie. access lists, etc...
> >
> > Thanks!!!
> >
> > Sincerely,
> >
> > Chris Kolp, CCNA
> > Systems Engineer
> > Neuron Broadcasting Technologies
> >
> > _
> > FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > 
> > http://1cis.com
> > Free E-mail Servers with unlimited mailboxes
> > 1st Class Internet Solutions
>
> 
> http://1cis.com
> Free E-mail Servers with unlimited mailboxes
> 1st Class Internet Solutions
>
> _
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Re: OSPF design question re: location of Area Border Router

[John Neiberger]

Got it!  Because of my lack of experience with OSPF, the original
question confused me until I thought through the configuration.  Until
then, I still thought of routers or interfaces belonging to areas.  What
really helped me to conceptualize this issue was to toss out that idea
and think of only *links* as belonging to areas.

Put into context,  I realized that given the original situation, the
link between the two routers would either be in area 0 or in area 1
depending on the configuration.  I know, most people probably already
understood that, but for some reason I just hadn't thought of it that
way before.  

Thanks for the clarification,
John

>>> "Howard C. Berkowitz" <[EMAIL PROTECTED]> 2/28/01 3:01:58 PM >>>
I haven't seen any of my posts show up for about a day or two -- not 
sure they are getting through.  Feel free to post this since yours, 
clearly are!  I'll copy to groupstudy just in case my posts start to 
work.


>I think I must be missing something here, or I don't understand the
>concept of ABR.
>
>If you have a 7513 in area 0 connected to a 4500 in area 1, for
>instance, then the 4500 will have one interface in area0 and the rest
>presumably in area 1.  By definition, that makes the 4500 an ABR,
>doesn't it?

Yes.

>I don't see how you have any choice in this matter at all,
>but since I've never actually configured OSPF perhaps someone will
>enlighten me.

In the situation described, the choice -- which I often like to do -- 
is not to put any area interfaces on the 4500.

Assume the 4500 is in area 0.0.0.1, and the WAN link to the core is 
192.168.0.0/30.  There's another 4500 in area 0.0.0.2, with a WAN 
link, 192.168.1.0/30.

Then, a configuration snippet for the 7513 might be:

int s0.1
ip addr 192.168.0.1 255.255.255.252
int s0.2
ip addr 192.168.1.1 255.255.255.252
int fe0
ip addr 172.16.0.1 255.255.255.0

router ospf 1
network 192.168.0.1 0.0.0.0 area 0.0.0.1
network 192.168.1.1 0.0.0.0 area 0.0.0.2
network 172.16.0.1  0.0.0.0 area 0.0.0.0

In this example, I deliberately put area 0.0.0.0 on a Fast Ethernet. 
Often, I keep 0.0.0.0 very small.  If I have redundant core routers, 
I'll connect them to switch ports on a common subnet.  I'll usually 
connect infrastructure servers such as SNMP, DNS, and DHCP to that 
subnet, but I avoid putting any application servers into it.

Even if the core routers are colocated at the same site as the 
application servers, I'm quite prone to put the servers in their own 
area.  One of the advantages of doing so is keeping server-to-server 
traffic, such as synchronization and backup, out of the core.

>
  "Hennen, David" <[EMAIL PROTECTED]> 2/28/01 9:32:59 AM >>>
>Hi, I am preparing to bring up a new site in an ospf network.  The
new
>site
>will be a training facility connected back to the main office by a
t1.
>Currently we use OSPF and have everything in area 0, around 100
>routers.
>
>I want to make this new site a different area and to make the new
area
>a
>Totally Stubby Area.  We have two 7513 routers at the main office
that
>handle all the wan traffic, the new remote office would connect to
one
>of
>these.  The remote training office will have a 4500.
>
>One of my coworkers suggested that the 7513 at the main office should
>be the
>Area Border Router, because we should keep area 0 from being spread
out
>over
>a bunch of wan links.  I had it in mind that the remote 4500 should
be
>the
>ABR.  I don't have a strong reason for thinking that way.  The cpu of
>the
>7513 runs between 20-30 % utilization according to snmp info.
>
>Are there any rules of thumb regarding this?  I looked through the
>Cisco
>OSPF network design book and can see some examples that support
having
>the
>ABR at the main office.  Is that the accepted practice?  Are there
any
>gotcha's to look out for?
>
>Thanks if you can help
>dave h
>
>_
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html 
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>
>
>
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Re: quick way to clear config totally

[John Neiberger]

>From privileged mode:

#erase startup-config
#reload

>>> "Christopher Kolp" <[EMAIL PROTECTED]> 2/28/01 3:21:46 PM
>>>
Is there a quick way to clear the entire config of a router?

"setup" doesn't kill everything and I don't have the IOS to re-flash.

any help is greatly appreciated since every way I've tried just
doesn't
take away everything, ie. access lists, etc...

Thanks!!!

Sincerely,

Chris Kolp, CCNA
Systems Engineer
Neuron Broadcasting Technologies

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Fwd: Re: OSPF design question re: location of Area BorderRouter

[John Neiberger]

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References: 
Date: Wed, 28 Feb 2001 17:01:58 -0500
To: "John Neiberger" <[EMAIL PROTECTED]>
From: "Howard C. Berkowitz" <[EMAIL PROTECTED]>
Subject: Re: OSPF design question re: location of Area Border Router
cc: [EMAIL PROTECTED]
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I haven't seen any of my posts show up for about a day or two -- not 
sure they are getting through.  Feel free to post this since yours, 
clearly are!  I'll copy to groupstudy just in case my posts start to 
work.


>I think I must be missing something here, or I don't understand the
>concept of ABR.
>
>If you have a 7513 in area 0 connected to a 4500 in area 1, for
>instance, then the 4500 will have one interface in area0 and the rest
>presumably in area 1.  By definition, that makes the 4500 an ABR,
>doesn't it?

Yes.

>I don't see how you have any choice in this matter at all,
>but since I've never actually configured OSPF perhaps someone will
>enlighten me.

In the situation described, the choice -- which I often like to do -- 
is not to put any area interfaces on the 4500.

Assume the 4500 is in area 0.0.0.1, and the WAN link to the core is 
192.168.0.0/30.  There's another 4500 in area 0.0.0.2, with a WAN 
link, 192.168.1.0/30.

Then, a configuration snippet for the 7513 might be:

int s0.1
ip addr 192.168.0.1 255.255.255.252
int s0.2
ip addr 192.168.1.1 255.255.255.252
int fe0
ip addr 172.16.0.1 255.255.255.0

router ospf 1
network 192.168.0.1 0.0.0.0 area 0.0.0.1
network 192.168.1.1 0.0.0.0 area 0.0.0.2
network 172.16.0.1  0.0.0.0 area 0.0.0.0

In this example, I deliberately put area 0.0.0.0 on a Fast Ethernet. 
Often, I keep 0.0.0.0 very small.  If I have redundant core routers, 
I'll connect them to switch ports on a common subnet.  I'll usually 
connect infrastructure servers such as SNMP, DNS, and DHCP to that 
subnet, but I avoid putting any application servers into it.

Even if the core routers are colocated at the same site as the 
application servers, I'm quite prone to put the servers in their own 
area.  One of the advantages of doing so is keeping server-to-server 
traffic, such as synchronization and backup, out of the core.

>
  "Hennen, David" <[EMAIL PROTECTED]> 2/28/01 9:32:59 AM >>>
>Hi, I am preparing to bring up a new site in an ospf network.  The new
>site
>will be a training facility connected back to the main office by a t1.
>Currently we use OSPF and have everything in area 0, around 100
>routers.
>
>I want to make this new site a different area and to make the new area
>a
>Totally Stubby Area.  We have two 7513 routers at the main office that
>handle all the wan traffic, the new remote office would connect to one
>of
>these.  The remote training office will have a 4500.
>
>One of my coworkers suggested that the 7513 at the main office should
>be the
>Area Border Router, because we should keep area 0 from being spread out
>over
>a bunch of wan links.  I had it in mind that the remote 4500 should be
>the
>ABR.  I don't have a strong reason for thinking that way.  The cpu of
>the
>7513 runs between 20-30 % utilization according to snmp info.
>
>Are there any rules of thumb regarding this?  I looked through the
>Cisco
>OSPF network design book and can see some examples that support having
>the
>ABR at the main office.  Is that the accepted practice?  Are there any
>gotcha's to look out for?
>
>Thanks if you can help
>dave h
>
>_
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>
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Re: Fw: BCMSN: VLAN ID How many bits? 10 or 15 ??

[Gopinath Pulyankote]

My Q was related to ISL only.  IEEE 802.1q has 12 bits, that's  clear.
After reading some of the replies, I can summarize ISL's VLAN ID as:
15 bits are allocated for the field  but only 10 are used now.

"anthony kim" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I think there is some confusion between ISL and IEEE 802.1q.
> Remember Cisco ISL VLAN ID field is 10 bits i.e. 2^10 or 1024 possible
> (0-1023)
>
> Just *think* about how many bits in an IEEE 802.1q frame it takes to make
> 4096 VLANs.
>
>
>
> --- Gopinath Pulyankote <[EMAIL PROTECTED]> wrote:
> > [Couldn't post this to the newsgroup, hence sending it to you directly]
> >
> > "Gopinath Pulyankote" <[EMAIL PROTECTED]> wrote in message news:...
> > How about this ? This says 10-bit VLAN ID !
> >
> >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/s
> > witch_c/xcisl.htm
> >
> >  Frame Tagging in ISL
> >
> >  With ISL, an Ethernet frame is encapsulated with a header that
> > transports
> >  VLAN IDs between switches and routers. A 26-byte header that contains a
> >  10-bit VLAN ID is prepended to the Ethernet frame.
> >
> >  --Gopinath
> >
> > > ""Brant Stevens"" <[EMAIL PROTECTED]> wrote in message
> > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > >
> > > > Information on ISL header...  taken from
> > > > http://www.cisco.com/warp/public/741/4.html
> > > >
> > > > VLAN - Virtual LAN ID
> > > > The VLAN field is the virtual LAN ID of the packet. It is a 15-bit
> > value
> > > > that is used to distinguish frames on different VLANs. This field is
> > often
> > > > referred to as the "color" of the packet.
> > > >
> > > > Information on 802.1Q packet... taken from
> > > >
> > >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
> > > > t/121t3/dtbridge.htm#xtocid114535
> > > >
> > > > The tag is stored in the following two octets and it contains 3 bits
> > of
> > > user
> > > > priority, 1 bit of Canonical Format Identifier (CFI) and 12 bits of
> > VLAN
> > > ID
> > > > (VID). The 3 bits of user priority are used by the standard 802.1p;
> > and
> > > the
> > > > CFI is used for compatibility reasons between Ethernet type networks
> > and
> > > > Token Ring type networks. The VID is the identification of the VLAN,
> > which
> > > > is basically used by the standard 802.1Q and, being on 12 bits, it
> > allows
> > > > the identification of 4096 VLANs.
> > > >
> > > >
> > > > Brant I. Stevens
> > > > Internetwork Solutions Engineer
> > > > Thrupoint, Inc.
> > > > 545 Fifth Avenue, 14th Floor
> > > > New York, NY. 10017
> > > > 646-562-6540
> > > >
> > > > -Original Message-
> > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
> > Of
> > > > Gopinath Pulyankote
> > > > Sent: Wednesday, February 28, 2001 1:49 PM
> > > > To: [EMAIL PROTECTED]
> > > > Subject: BCMSN: VLAN ID How many bits? 10 or 15 ??
> > > >
> > > >
> > > > Hi all,
> > > > The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15
> > bits,
> > > > but I read somewhere else its 10 bits.
> > > > Which is correct ??
> > > > TIA
> > > > --Gopinath
> > > >
> > > >
> > > > _
> > > > FAQ, list archives, and subscription info:
> > > > http://www.groupstudy.com/list/cisco.html
> > > > Report misconduct and Nondisclosure violations to
> > [EMAIL PROTECTED]
> > > >
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> >
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Re: 2500 series e0 fullduplex?

[SAIF]

well its not a terminology thing u see its understood when u use 100mbps its then not
csma/cd ethernet thing ,they made it like thre will be no collisions and speed will be
10 times than 10 mbps
yes u r right on 36xx router there is full/half/auto duplex but u didnt get the idea
,its basically technology which is sensing which media is supported to that interface
,if it is 10mbps then interface will make it half duplex ethernet and i it is 
100mbs
it will make it fast ethernet full duplex and u have choice to make it half/full duplex
by ur choice according to ur existing medium and toplogy
THAT PORT MUST BE NOT A FASTETHERNET PORT  BUT IT CAN BE IF U USE IT IN 100MBPS WAY
THERE IS ANOTHER THING YES IT IS POSSIBL I AGREE U CAN WORK 10BASE T  (ONLY NOT
COAXIAL) WITH FULL DUPLEX BUT THE THING IS THAT WHAT I WAS POINTING THAT CISCO PRODUCTS
USUALLY DONT SUPPORTFULL DUPLEX WITH 10MBPS
AM I WRONG ?

Neil Schneider wrote:

> Sorry but you are incorrect.  (unless we just have a terminology difference
> here) Just becuase you are running 100mbps. it is not automatically full
> duplex.  the Fastethernet ports on routers (3640 seriesfor example) can be
> set to full/half/auto duplex.  why bother with a half duplex setting if all
> fastethernet is full duplex?
>
> --
> Neil Schneider
> MCT  MCSE  CCSI  CCNP
>
> "SAIF" <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > 100mbps is not ethernet be sure its fast ethernet ,also their is no
> collisions in fast
> > ethernet ,its colliision free and this is only possible if u have one way
> to send and
> > one way to recieve data simultaneously :) i am sure u got the idea
> > secondly in ethernet there are collisions and if there are colliisions
> Can u use one to
> > send and one way to recieve simultaneously with collisions so if u cant
> the result is
> > ethernet works in half duplex mode and fast ethernnet works in full duplex
> > if u have any thing different than me plz share with us
> > waiting ur reply
> > Saif
> >
> > Neil Schneider wrote:
> >
> > > It is NOT true that ethernet is half and fastethernet is full duplex.
> > > Either 10Mbps or 100Mbps ehternet can be run in half or full duplex
> mode.
> > > And offhand I don't know if the 2500 AUI port will do full ethernet.
> > >
> > > --
> > > Neil Schneider
> > > MCT  MCSE  CCSI  CCNP
> > >
> > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > NO ITS ETHERNET PORT AND WORKING HALF DUPLEX ONLY ,U SEE CISCO GIVES
> > > FASTETHERNET PORTS
> > > > SPECIALLY IN THEIR ROUTERS SPECIALLY IN 4XXX SERIES AND U KNOW
> ETHERNET
> > > WORKS IN HALF
> > > > DUPLEX AND FASTETHERNET WORKS IN FULL DUPLEX  SO THE RESULT IS AUI
> PORT IS
> > > HALF DUPLEX
> > > > ETHERNET NOT AUTO SENSE AND IF U WANT AUTOSENSE 10/100 BASE T  GO TO
> ANY
> > > OTHER ROUTER
> > > > ,CHECK THE ROUTER;S MANUAL :)
> > > > HOPT IT WILL HELP
> > > > IS IT ?
> > > >
> > > > Turfis wrote:
> > > >
> > > > > Is the Ethernet AUI port on the 2500 series Cisco routers Full
> Duplex
> > > > > compatible?  Does it autonegoiate?  Can you hard code the interface
> for
> > > > > half/full/auto?  Thanks!
> > > > >
> > > > > _
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> > > http://www.groupstudy.com/list/cisco.html
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> [EMAIL PROTECTED]
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> > > >
> > >
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RE: quick way to clear config totally

[Daniel Cotts]

erase start
reload

> -Original Message-
> From: Christopher Kolp [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, February 28, 2001 4:22 PM
> To: [EMAIL PROTECTED]
> Subject: quick way to clear config totally
> 
> 
> Is there a quick way to clear the entire config of a router?
> 
> "setup" doesn't kill everything and I don't have the IOS to re-flash.
> 
> any help is greatly appreciated since every way I've tried 
> just doesn't
> take away everything, ie. access lists, etc...
> 
> Thanks!!!
> 
> Sincerely,
> 
> Chris Kolp, CCNA
> Systems Engineer
> Neuron Broadcasting Technologies
> 
> _
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Re: Fw: BCMSN: VLAN ID How many bits? 10 or 15 ??

[anthony kim]

I think there is some confusion between ISL and IEEE 802.1q.
Remember Cisco ISL VLAN ID field is 10 bits i.e. 2^10 or 1024 possible
(0-1023)

Just *think* about how many bits in an IEEE 802.1q frame it takes to make
4096 VLANs.



--- Gopinath Pulyankote <[EMAIL PROTECTED]> wrote:
> [Couldn't post this to the newsgroup, hence sending it to you directly]
> 
> "Gopinath Pulyankote" <[EMAIL PROTECTED]> wrote in message news:...
> How about this ? This says 10-bit VLAN ID !
> 
> 
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/s
> witch_c/xcisl.htm
> 
>  Frame Tagging in ISL
> 
>  With ISL, an Ethernet frame is encapsulated with a header that
> transports
>  VLAN IDs between switches and routers. A 26-byte header that contains a
>  10-bit VLAN ID is prepended to the Ethernet frame.
> 
>  --Gopinath
> 
> > ""Brant Stevens"" <[EMAIL PROTECTED]> wrote in message
> > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > >
> > > Information on ISL header...  taken from
> > > http://www.cisco.com/warp/public/741/4.html
> > >
> > > VLAN - Virtual LAN ID
> > > The VLAN field is the virtual LAN ID of the packet. It is a 15-bit
> value
> > > that is used to distinguish frames on different VLANs. This field is
> often
> > > referred to as the "color" of the packet.
> > >
> > > Information on 802.1Q packet... taken from
> > >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
> > > t/121t3/dtbridge.htm#xtocid114535
> > >
> > > The tag is stored in the following two octets and it contains 3 bits
> of
> > user
> > > priority, 1 bit of Canonical Format Identifier (CFI) and 12 bits of
> VLAN
> > ID
> > > (VID). The 3 bits of user priority are used by the standard 802.1p;
> and
> > the
> > > CFI is used for compatibility reasons between Ethernet type networks
> and
> > > Token Ring type networks. The VID is the identification of the VLAN,
> which
> > > is basically used by the standard 802.1Q and, being on 12 bits, it
> allows
> > > the identification of 4096 VLANs.
> > >
> > >
> > > Brant I. Stevens
> > > Internetwork Solutions Engineer
> > > Thrupoint, Inc.
> > > 545 Fifth Avenue, 14th Floor
> > > New York, NY. 10017
> > > 646-562-6540
> > >
> > > -Original Message-
> > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
> Of
> > > Gopinath Pulyankote
> > > Sent: Wednesday, February 28, 2001 1:49 PM
> > > To: [EMAIL PROTECTED]
> > > Subject: BCMSN: VLAN ID How many bits? 10 or 15 ??
> > >
> > >
> > > Hi all,
> > > The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15
> bits,
> > > but I read somewhere else its 10 bits.
> > > Which is correct ??
> > > TIA
> > > --Gopinath
> > >
> > >
> > > _
> > > FAQ, list archives, and subscription info:
> > > http://www.groupstudy.com/list/cisco.html
> > > Report misconduct and Nondisclosure violations to
> [EMAIL PROTECTED]
> > >
> > > _
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> > > Report misconduct and Nondisclosure violations to
> [EMAIL PROTECTED]
> > >
> >
> >
> 
> _
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Re: quick way to clear config totally

[Kelly D Griffin]

write erase from the enable prompt.

Kelly D Griffin, CCNA, CCDA
Network Engineer
Kg2 Network Design
http://www.kg2.com


- Original Message -
From: "Christopher Kolp" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, February 28, 2001 4:21 PM
Subject: quick way to clear config totally


> Is there a quick way to clear the entire config of a router?
>
> "setup" doesn't kill everything and I don't have the IOS to re-flash.
>
> any help is greatly appreciated since every way I've tried just doesn't
> take away everything, ie. access lists, etc...
>
> Thanks!!!
>
> Sincerely,
>
> Chris Kolp, CCNA
> Systems Engineer
> Neuron Broadcasting Technologies
>
> _
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> 
> http://1cis.com
> Free E-mail Servers with unlimited mailboxes
> 1st Class Internet Solutions


http://1cis.com
Free E-mail Servers with unlimited mailboxes
1st Class Internet Solutions

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RE: quick way to clear config totally

[Rizzo Damian]

Did you try "erase start"



-Original Message-
From: Christopher Kolp [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 28, 2001 5:22 PM
To: [EMAIL PROTECTED]
Subject: quick way to clear config totally


Is there a quick way to clear the entire config of a router?

"setup" doesn't kill everything and I don't have the IOS to re-flash.

any help is greatly appreciated since every way I've tried just doesn't
take away everything, ie. access lists, etc...

Thanks!!!

Sincerely,

Chris Kolp, CCNA
Systems Engineer
Neuron Broadcasting Technologies

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Re: 2500 series e0 fullduplex?

[Kevin Wigle]

As I think was mentioned before in this thread, the 4700 has an ethernet
module that supports 10 meg full-duplex.

We are using that config at one of our clients.

Kevin Wigle

- Original Message -
From: "Marty Adkins" <[EMAIL PROTECTED]>
To: "Priscilla Oppenheimer" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Wednesday, February 28, 2001 3:36 PM
Subject: Re: 2500 series e0 fullduplex?


> Priscilla Oppenheimer wrote:
> >
> > Regarding the original question, though I couldn't find a URL to confirm
> > this, I don't think the Ethernet AUI port on the 2500 series Cisco
router
> > supports full duplex. I think the 2500 routers came out before full
duplex
> > Ethernet existed for one thing. Also, I doubt that it is possible to
> > support full duplex with an AUI attachment. You would need a way to tell
> > the transceiver to ignore collision detection, and that's probably not
> > supported.
> >
> The 2500 e0 is definitely half-duplex CSMA/CD only.  It uses a LANCE chip
> as its "NIC" which predates fast Ethernet.  AFAIK, there are no Cisco
> routers with 10Mb Ethernets that support full-duplex.  Prior to the
> introduction of fast Ethernet in the industry, there were a few NIC
> vendors that added full-duplex capability to 10Mb cards.  But it never
> really caught on; plus it was superceded by 10/100.
>
>   Marty Adkins Email: [EMAIL PROTECTED]
>   Mentor Technologies  Phone: 240-568-6526
>   133 National Business Pkwy   WWW: http://www.mentortech.com
>   Annapolis Junction, MD  20701Cisco CCIE #1289
>
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quick way to clear config totally

[Christopher Kolp]

Is there a quick way to clear the entire config of a router?

"setup" doesn't kill everything and I don't have the IOS to re-flash.

any help is greatly appreciated since every way I've tried just doesn't
take away everything, ie. access lists, etc...

Thanks!!!

Sincerely,

Chris Kolp, CCNA
Systems Engineer
Neuron Broadcasting Technologies

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RE: Latency Program

[Jim Dixon]

Why could you not just
use ping  > ping.txt
the greater than redirects the output into the named file ping.txt
If I want to ADD do ping.txt
I could subsequently use >> instead of >
to append to the end of the file.

It works great for me on Win98 at the command prompt.  
Then I just edit the file or open it with notepad to see my results.

-Original Message-
From: Dan West [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 28, 2001 3:44 PM
To: NetEng; [EMAIL PROTECTED]
Subject: Re: Latency Program


On most Unix hosts you could run the following command
from a shell prompt.

> ping generic.host.com >> ping.results 

<> hit  to break the ping. Now, "more"
the new file ping.results, 

> more ping.results

to see what the latency results are!

Note that on some flavors like Solaris, you have to
use the '-s' flag for the ping command to see detailed
info. So on a Solaris box run it like this...

> ping -s generic.host.com >> ping.results   --- Have
fun


--- NetEng <[EMAIL PROTECTED]> wrote:
> Does anyone know of a program that will ping a host
> and record the latency?
> Multiple links would be a +. Thanks
> 
> 
> _
> FAQ, list archives, and subscription info:
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=
from The Big Lebowski...

The Dude: You sure he won't mind?
Bunny: Dieter doesn't care about anything. He's a nihilist.
The Dude: Ohhh, that must be exhausting...

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Re: computer networking degree

[Michael Linehan]

Steve,

You can earn a BS in Information Technology with a Network Technology concentration 
from
Capella University. This can be done online without having to personally attend one
class. You can find Capella online at

www.capellauniversity.edu

P.S. I am currently enrolled for spring quarter and have received very good
recommendations from other people.

Mike Linehan

steve billy wrote:

> Hi group,
>
> Can you please tell me good universities from where
> one can obtain degree at the undergraduate and
> graduate level in computer networking (specifically).
>
> Thanks
> Steve
>
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Re: Problem with the 2600 voice hang up

[Riera, Alvaro (4152)]

Add "no supervisory disconnect" under the FXO port. This have worked for me
before.

Alvaro Riera
CCIE 6826, CCNP+Voice Access+Security, CCDP
Networking Consultant
 


-Original Message-
From: Paulo Roque [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 28, 2001 4:16 PM
To: [EMAIL PROTECTED]
Subject: Re: Problem with the 2600 voice hang up





Hi Shenghai,

This is a very common problem. The FXO doesn't detect the "hand up" tone and
keeps ringing.
There is a command to workaround this problem, but I have never used it,
because it requires a new compression module.
You may  try it a tell me the results.  The information is on:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
t/121t3/dt_fxodt.htm


Paulo Roque

> Did somebody face the problem with voice gateway
> (2600) with incoming CO trunk to FXO and Station with
> FXS.
>
> PSTN line in FXO port ring at FXS port in the same
> router. Disconnect problem with FXO
>
> Senario:
> UserA calls from PSTN to FXO port. PLAR FXS phone
> rings. Nobody pick up the ringing PLAR phone. UserA
> hangs up.
>
> Problem:
> The PLAR extension keeps on ringing even though userA
> already hang up.
>
> Thanks



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Re: packet sniffing on a catalyst switch.

[Tony van Ree]

Hi,


This could be fun,

One port to capture all ports.  If the port is 100Meg Full Duplex going into your 
captur device and your capture device can deal with all the requests etc made of it.  
How many 100Meg ports could you indeed view at the same time.  My guess is not many.  
You would tend to lose quite a bit of data in your captures.

I would suggest putting a monitor on the ports connecting the servers, be aware that I 
am not going to capture all and start from there.  

Whilst you can setup 'span' to look at multiple ports be aware the port you are 
monitoring from still operates as one port.

the command
 
set span enable
   set span disable
   set span  
[rx|tx|both] [inpkts ]
   set span  
[rx|tx|both] [inpkts ]

Most 'cat' codes provide help.  

eg/ set span ? provided the above.

Just some ramblings from an 'old geezer'

Teunis
Hobart, Tasmania
Australia




On Wednesday, February 28, 2001 at 11:16:25 AM, Langa Kentane wrote:

> How do I setup one of my ports to catch the traffic that goes thru all the
> ports on the switch for packet sniffing.  I want to put an intrusion
> detection sensor on a switch.
> 
> Thanks in advance
> 
> _
> Langa Kentane |   Tel:[011] 290 3218
> Security Administrator|   Cell:   082 606 1515
> [CNA MCSE CCSA CCNA]  |   www.discoveryhealth.co.za
> _
> 
> _
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> 


--
www.tasmail.com


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OSPF design question re: location of Area Border Router

[jenny . mcleod]

John,
You could equally well have the 7513 with one interface in area 1 and the
rest in area 0, and the 4500 with all interfaces in area 1, in which case
the 7513 is the ABR.

David,
Am I correct in thinking that the only router at the remote site is the
4500?  Or is there more 'behind it'?  Because if the 4500 is the only
router, you're not gaining much by making the 4500 the ABR.  Area 0 will
still include all the routers in your network, and the 4500 will still have
all the area 0 information.  You can summarise your remote site routes into
area 0, but that's about it.
Are you planning on extending this idea and having lots of other areas set
up in the same way?  Generally regarded as not a good idea to have 'too
many' areas defined on one router - the guidelines I saw last (quite a
while ago) suggested a maximum of three areas per router but even at the
time that was a very vague rule of thumb - they also suggested a maximum of
about 60 routers in an area which you are obviously exceeding, presumably
without problems.
Running area 0 over WAN links is not necessarily a terrible thing to do -
if your network is stable, OSPF doesn't spew out lots of traffic.
Making the 7513 the ABR is probably your best bet - it sounds like your
7513 can cope with it (check your memory usage as well, though).

JMcL


-- Forwarded by Jenny Mcleod/NSO/CSDA on 01/03/2001
08:38 am ---


"John Neiberger" <[EMAIL PROTECTED]>@groupstudy.com on
01/03/2001 04:19:39 am

Please respond to "John Neiberger" <[EMAIL PROTECTED]>

Sent by:  [EMAIL PROTECTED]



To:   [EMAIL PROTECTED]
cc:


Subject:  OSPF design question re: location of Area Border Router


I think I must be missing something here, or I don't understand the
concept of ABR.

If you have a 7513 in area 0 connected to a 4500 in area 1, for
instance, then the 4500 will have one interface in area0 and the rest
presumably in area 1.  By definition, that makes the 4500 an ABR,
doesn't it?  I don't see how you have any choice in this matter at all,
but since I've never actually configured OSPF perhaps someone will
enlighten me.

>>> "Hennen, David" <[EMAIL PROTECTED]> 2/28/01 9:32:59 AM >>>
Hi, I am preparing to bring up a new site in an ospf network.  The new
site
will be a training facility connected back to the main office by a t1.
Currently we use OSPF and have everything in area 0, around 100
routers.

I want to make this new site a different area and to make the new area
a
Totally Stubby Area.  We have two 7513 routers at the main office that
handle all the wan traffic, the new remote office would connect to one
of
these.  The remote training office will have a 4500.

One of my coworkers suggested that the 7513 at the main office should
be the
Area Border Router, because we should keep area 0 from being spread out
over
a bunch of wan links.  I had it in mind that the remote 4500 should be
the
ABR.  I don't have a strong reason for thinking that way.  The cpu of
the
7513 runs between 20-30 % utilization according to snmp info.

Are there any rules of thumb regarding this?  I looked through the
Cisco
OSPF network design book and can see some examples that support having
the
ABR at the main office.  Is that the accepted practice?  Are there any
gotcha's to look out for?

Thanks if you can help
dave h

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Re: Latency Program

[Dan West]

On most Unix hosts you could run the following command
from a shell prompt.

> ping generic.host.com >> ping.results 

<> hit  to break the ping. Now, "more"
the new file ping.results, 

> more ping.results

to see what the latency results are!

Note that on some flavors like Solaris, you have to
use the '-s' flag for the ping command to see detailed
info. So on a Solaris box run it like this...

> ping -s generic.host.com >> ping.results   --- Have
fun


--- NetEng <[EMAIL PROTECTED]> wrote:
> Does anyone know of a program that will ping a host
> and record the latency?
> Multiple links would be a +. Thanks
> 
> 
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=
from The Big Lebowski...

The Dude: You sure he won't mind?
Bunny: Dieter doesn't care about anything. He's a nihilist.
The Dude: Ohhh, that must be exhausting...

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Re: BCMSN: VLAN ID How many bits? 10 or 15 ??

[Larry Lamb]

The ISL head includes a space for a 15-bit VLAN ID, but currently only
10-bits are used for this.  This gives you the maximum number of VLANs of
1024.

""Gopinath Pulyankote"" <[EMAIL PROTECTED]> wrote in message
97jl7g$5fj$[EMAIL PROTECTED]">news:97jl7g$5fj$[EMAIL PROTECTED]...
> Hi all,
> The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15 bits,
> but I read somewhere else its 10 bits.
> Which is correct ??
> TIA
> --Gopinath
>
>
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Re: Off Topic: Sniffing NetBIOS SMB Sessions

[Michael Linehan]

Sorry, my fault wasn't thinking. I agree with you it is probably nothing to wory about.
I'll try and get a "printout" and repost the question and information tomorrow morning.

Thanks for the help.
Mike Linehan

Priscilla Oppenheimer wrote:

> A jpg image? I guess I confused you by saying "printout." Sorry. I would
> need to see the whole packet in text format. Plus the whole group should
> see it if we are going to use this group study list for its intended
> purpose. You should be able to copy and paste the detail of the packet into
> e-mail. You would want to x out the IP addresses. If it's too much work,
> just check yourself if header lengths add up. I think the sniffer is
> complaining that it received more or less data than it expected, based on
> length fields in the packet itself. It's probably not something to worry
> about, especially if you're not troubleshooting an actual network problem.
>
> At 02:29 PM 2/28/01, Michael Linehan wrote:
> >Here is a JPEG image of the analyzer with Packet 25 highlighted. Hope this
> >clears things
> >up.
> >
> >Thanks.
> >
> >Priscilla Oppenheimer wrote:
> >
> > > is that it's the Sniffer saying "not enough data," rather than a NetBIOS or
> > > SMB process saying this. The Sniffer is seeing a different number of bytes
> > > than it expected to see based on its decode of the headers. Can you send us
> > > a printout of the offending packet? Thanks.
> > >
> > > Priscilla
> > >
> > > At 11:45 AM 2/28/01, Michael Linehan wrote:
> > > >I need something answered and I hope someone can help me here. After all
> > > >you guys/gals are the best. I am watching a file copy operation on a
> > > >sniffer in a windows environment. I am constantly seeing a reference to
> > > >an error and I am not sure what it means. In the summary window I have a
> > > >line that reads:
> > > >
> > > >R=Read+X, Read 4096; Error-Not Enough Data!!!
> > > >
> > > >In the Packet window under the NetBIOS Service Session I see:
> > > >
> > > >  ***Mismatch --> Actual Data Length: 1456 bytes
> > > >
> > > >Does anyone have any idea what this means? I have seen the sequence
> > > >virtually every time I see files copied in Windows. If I was to venture
> > > >a guess it is NetBIOS way of saying that the file is too large for a
> > > >single packet, I have to break it up into pieces to transmit.
> > > >
> > > >Am I right?
> > > >
> > > >Thanks gurus,
> > > >Michael Linehan
> > > >
> > > >_
> > > >FAQ, list archives, and subscription info:
> > > >http://www.groupstudy.com/list/cisco.html
> > > >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > >
> > > 
> > >
> > > Priscilla Oppenheimer
> > > http://www.priscilla.com
> > >
> > > _
> > > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
> 
>
> Priscilla Oppenheimer
> http://www.priscilla.com
>
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Re: computer networking degree

[Lauren Child]

Sheffield Hallam University here in the UK do a couple.  I did the 4
year BSc (Hons) Computing (Networks and Communications).

They also do an MSc in Enterprise Network Management  with Novell, which
is web based although youd have to fly over for 3 weeks for tutorials
and exams.

That said I dont know how useful it world be - Theres a bit of confusion
between US and UK degree levels, yet they have similar names.  I think
(although I could be wrong) that an MSc is more work than an MS, so if
people over there have the same amount of confusion it wouldnt be worth
the extra work, unless you take the foreign degree cool factor into
account.

TTFN
Lauren

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Re: Problem with the 2600 voice hang up

[Paulo Roque]

Hi Shenghai,

This is a very common problem. The FXO doesn't detect the "hand up" tone and
keeps ringing.
There is a command to workaround this problem, but I have never used it,
because it requires a new compression module.
You may  try it a tell me the results.  The information is on:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
t/121t3/dt_fxodt.htm


Paulo Roque

> Did somebody face the problem with voice gateway
> (2600) with incoming CO trunk to FXO and Station with
> FXS.
>
> PSTN line in FXO port ring at FXS port in the same
> router. Disconnect problem with FXO
>
> Senario:
> UserA calls from PSTN to FXO port. PLAR FXS phone
> rings. Nobody pick up the ringing PLAR phone. UserA
> hangs up.
>
> Problem:
> The PLAR extension keeps on ringing even though userA
> already hang up.
>
> Thanks



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Re: Off Topic: Sniffing NetBIOS SMB Sessions

[Priscilla Oppenheimer]

A jpg image? I guess I confused you by saying "printout." Sorry. I would 
need to see the whole packet in text format. Plus the whole group should 
see it if we are going to use this group study list for its intended 
purpose. You should be able to copy and paste the detail of the packet into 
e-mail. You would want to x out the IP addresses. If it's too much work, 
just check yourself if header lengths add up. I think the sniffer is 
complaining that it received more or less data than it expected, based on 
length fields in the packet itself. It's probably not something to worry 
about, especially if you're not troubleshooting an actual network problem.

At 02:29 PM 2/28/01, Michael Linehan wrote:
>Here is a JPEG image of the analyzer with Packet 25 highlighted. Hope this 
>clears things
>up.
>
>Thanks.
>
>Priscilla Oppenheimer wrote:
>
> > is that it's the Sniffer saying "not enough data," rather than a NetBIOS or
> > SMB process saying this. The Sniffer is seeing a different number of bytes
> > than it expected to see based on its decode of the headers. Can you send us
> > a printout of the offending packet? Thanks.
> >
> > Priscilla
> >
> > At 11:45 AM 2/28/01, Michael Linehan wrote:
> > >I need something answered and I hope someone can help me here. After all
> > >you guys/gals are the best. I am watching a file copy operation on a
> > >sniffer in a windows environment. I am constantly seeing a reference to
> > >an error and I am not sure what it means. In the summary window I have a
> > >line that reads:
> > >
> > >R=Read+X, Read 4096; Error-Not Enough Data!!!
> > >
> > >In the Packet window under the NetBIOS Service Session I see:
> > >
> > >  ***Mismatch --> Actual Data Length: 1456 bytes
> > >
> > >Does anyone have any idea what this means? I have seen the sequence
> > >virtually every time I see files copied in Windows. If I was to venture
> > >a guess it is NetBIOS way of saying that the file is too large for a
> > >single packet, I have to break it up into pieces to transmit.
> > >
> > >Am I right?
> > >
> > >Thanks gurus,
> > >Michael Linehan
> > >
> > >_
> > >FAQ, list archives, and subscription info:
> > >http://www.groupstudy.com/list/cisco.html
> > >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
> > 
> >
> > Priscilla Oppenheimer
> > http://www.priscilla.com
> >
> > _
> > FAQ, list archives, and subscription info: 
> http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]




Priscilla Oppenheimer
http://www.priscilla.com

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Question on Packet Shaper install

[Buri, Heather H]

I have a question for those of you who have worked with Packet Shapers.  We
recently installed one at our site last Thursday via a directive from
Headquarters.  We placed it between our Cabletron 8600 SmartSwitch (inside
interface on the PacketShaper and straight through cable) and our Cisco 4500
router ethernet interface (outside interface and cross-over cable).  All was
working well until this morning when the packet shaper stopped passing
traffic.  It has not yet been configured to shape traffic, it was only in
traffic discovery mode at present.  However, after some troubleshooting, I
noticed the ARP entries on the Cisco 4500 had become corrupted.

I powered off the Packet Shaper and cleared the ARP table in the Cisco 4500
and traffic began flowing normally again.  

My question is, has anyone had similar issues with a Packet Shaper install?
I will be contacting Packeteer technical support for assistance as well as
our Headquarters Networking staff since they are responsible for the
configuration on the box.  However, I thought I would ask here since I
thought someone on this list may have come across a similar problem.  Could
an speed/duplex autonegotiation mismatch cause this to occur?  

I will be taking it offline this evening after production hours to examine
the configuration more closely.  

Thanks!

Heather Buri - CCNA

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Re: 2500 series e0 fullduplex?

[Marty Adkins]

Priscilla Oppenheimer wrote:
> 
> Regarding the original question, though I couldn't find a URL to confirm
> this, I don't think the Ethernet AUI port on the 2500 series Cisco router
> supports full duplex. I think the 2500 routers came out before full duplex
> Ethernet existed for one thing. Also, I doubt that it is possible to
> support full duplex with an AUI attachment. You would need a way to tell
> the transceiver to ignore collision detection, and that's probably not
> supported.
> 
The 2500 e0 is definitely half-duplex CSMA/CD only.  It uses a LANCE chip
as its "NIC" which predates fast Ethernet.  AFAIK, there are no Cisco
routers with 10Mb Ethernets that support full-duplex.  Prior to the
introduction of fast Ethernet in the industry, there were a few NIC
vendors that added full-duplex capability to 10Mb cards.  But it never
really caught on; plus it was superceded by 10/100.

  Marty Adkins Email: [EMAIL PROTECTED]
  Mentor Technologies  Phone: 240-568-6526
  133 National Business Pkwy   WWW: http://www.mentortech.com
  Annapolis Junction, MD  20701Cisco CCIE #1289

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Re: Off Topic: Sniffing NetBIOS SMB Sessions

[Michael Linehan]

Here is a JPEG image of the analyzer with Packet 25 highlighted. Hope this clears 
things
up.

Thanks.

Priscilla Oppenheimer wrote:

> is that it's the Sniffer saying "not enough data," rather than a NetBIOS or
> SMB process saying this. The Sniffer is seeing a different number of bytes
> than it expected to see based on its decode of the headers. Can you send us
> a printout of the offending packet? Thanks.
>
> Priscilla
>
> At 11:45 AM 2/28/01, Michael Linehan wrote:
> >I need something answered and I hope someone can help me here. After all
> >you guys/gals are the best. I am watching a file copy operation on a
> >sniffer in a windows environment. I am constantly seeing a reference to
> >an error and I am not sure what it means. In the summary window I have a
> >line that reads:
> >
> >R=Read+X, Read 4096; Error-Not Enough Data!!!
> >
> >In the Packet window under the NetBIOS Service Session I see:
> >
> >  ***Mismatch --> Actual Data Length: 1456 bytes
> >
> >Does anyone have any idea what this means? I have seen the sequence
> >virtually every time I see files copied in Windows. If I was to venture
> >a guess it is NetBIOS way of saying that the file is too large for a
> >single packet, I have to break it up into pieces to transmit.
> >
> >Am I right?
> >
> >Thanks gurus,
> >Michael Linehan
> >
> >_
> >FAQ, list archives, and subscription info:
> >http://www.groupstudy.com/list/cisco.html
> >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
> 
>
> Priscilla Oppenheimer
> http://www.priscilla.com
>
> _
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Re: NAT/PAT Question

[Paulo Roque]

Warrick FitzGerald wrote:

> Hi All,
>
> I am trying to configure NAT/PAT where all I am trying to do is change to
> Destination Port (DP) of traffic ie. all traffic with a DP of 443 and a
> specific destination IP Address (DA) of xxx.xxx.xxx.xxx should be NAT'ed to
> xxx.xxx.xxx.xxx with a DP of 444.
>
> Why does this not work ?
>
> ip nat inside source static tcp 65.143.50.10 443 65.143.50.10 444

To translate the destination address you must use

ip nat inside OUTSIDE static tcp 65.143.50.10 443 65.143.50.10 444

Paulo Roque
Network Engineer
[EMAIL PROTECTED]

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Training on switches.

[Heckle]

I am trying to find  aresource to get some training on Cisco Switches
(2900's thru 5500's) for some people at work. Something on CD would be
best. Perhaps something like  Learneky offers. Can anyone mak eany
sugegstions?

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Cisco 3000 router

[Fowler, Robert J.]

Would a Cisco 3000 Router be a good addition to a small lab? What would one
be worth. Say 8/16MB Flash/Ram?



Thanks,
Joey Fowler

We are told that talent creates its own opportunities. But it sometimes
seems that intense desire creates not only its own opportunities, but its
own talents.
- Eric Hoffer (1902-1983 American Author & Philosopher)



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Fw: BCMSN: VLAN ID How many bits? 10 or 15 ??

[Gopinath Pulyankote]

[Couldn't post this to the newsgroup, hence sending it to you directly]

"Gopinath Pulyankote" <[EMAIL PROTECTED]> wrote in message news:...
How about this ? This says 10-bit VLAN ID !


http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/s
witch_c/xcisl.htm

 Frame Tagging in ISL

 With ISL, an Ethernet frame is encapsulated with a header that transports
 VLAN IDs between switches and routers. A 26-byte header that contains a
 10-bit VLAN ID is prepended to the Ethernet frame.

 --Gopinath

> ""Brant Stevens"" <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> >
> > Information on ISL header...  taken from
> > http://www.cisco.com/warp/public/741/4.html
> >
> > VLAN - Virtual LAN ID
> > The VLAN field is the virtual LAN ID of the packet. It is a 15-bit value
> > that is used to distinguish frames on different VLANs. This field is
often
> > referred to as the "color" of the packet.
> >
> > Information on 802.1Q packet... taken from
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
> > t/121t3/dtbridge.htm#xtocid114535
> >
> > The tag is stored in the following two octets and it contains 3 bits of
> user
> > priority, 1 bit of Canonical Format Identifier (CFI) and 12 bits of VLAN
> ID
> > (VID). The 3 bits of user priority are used by the standard 802.1p; and
> the
> > CFI is used for compatibility reasons between Ethernet type networks and
> > Token Ring type networks. The VID is the identification of the VLAN,
which
> > is basically used by the standard 802.1Q and, being on 12 bits, it
allows
> > the identification of 4096 VLANs.
> >
> >
> > Brant I. Stevens
> > Internetwork Solutions Engineer
> > Thrupoint, Inc.
> > 545 Fifth Avenue, 14th Floor
> > New York, NY. 10017
> > 646-562-6540
> >
> > -Original Message-
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> > Gopinath Pulyankote
> > Sent: Wednesday, February 28, 2001 1:49 PM
> > To: [EMAIL PROTECTED]
> > Subject: BCMSN: VLAN ID How many bits? 10 or 15 ??
> >
> >
> > Hi all,
> > The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15
bits,
> > but I read somewhere else its 10 bits.
> > Which is correct ??
> > TIA
> > --Gopinath
> >
> >
> > _
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
> > _
> > FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
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> >
>
>

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Re: BCMSN: VLAN ID How many bits? 10 or 15 ??

[Gopinath Pulyankote]

How about this ? This says 10-bit VLAN ID !

http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/s
witch_c/xcisl.htm
Frame Tagging in ISL
With ISL, an Ethernet frame is encapsulated with a header that transports
VLAN IDs between switches and routers. A 26-byte header that contains a
10-bit VLAN ID is prepended to the Ethernet frame.

--Gopinath

""Brant Stevens"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> Information on ISL header...  taken from
> http://www.cisco.com/warp/public/741/4.html
>
> VLAN - Virtual LAN ID
> The VLAN field is the virtual LAN ID of the packet. It is a 15-bit value
> that is used to distinguish frames on different VLANs. This field is often
> referred to as the "color" of the packet.
>
> Information on 802.1Q packet... taken from
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
> t/121t3/dtbridge.htm#xtocid114535
>
> The tag is stored in the following two octets and it contains 3 bits of
user
> priority, 1 bit of Canonical Format Identifier (CFI) and 12 bits of VLAN
ID
> (VID). The 3 bits of user priority are used by the standard 802.1p; and
the
> CFI is used for compatibility reasons between Ethernet type networks and
> Token Ring type networks. The VID is the identification of the VLAN, which
> is basically used by the standard 802.1Q and, being on 12 bits, it allows
> the identification of 4096 VLANs.
>
>
> Brant I. Stevens
> Internetwork Solutions Engineer
> Thrupoint, Inc.
> 545 Fifth Avenue, 14th Floor
> New York, NY. 10017
> 646-562-6540
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> Gopinath Pulyankote
> Sent: Wednesday, February 28, 2001 1:49 PM
> To: [EMAIL PROTECTED]
> Subject: BCMSN: VLAN ID How many bits? 10 or 15 ??
>
>
> Hi all,
> The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15 bits,
> but I read somewhere else its 10 bits.
> Which is correct ??
> TIA
> --Gopinath
>
>
> _
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
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>
> _
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http://www.groupstudy.com/list/cisco.html
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>


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RE: BCMSN: VLAN ID How many bits? 10 or 15 ??

[Brant Stevens]

Information on ISL header...  taken from
http://www.cisco.com/warp/public/741/4.html

VLAN - Virtual LAN ID
The VLAN field is the virtual LAN ID of the packet. It is a 15-bit value
that is used to distinguish frames on different VLANs. This field is often
referred to as the "color" of the packet.

Information on 802.1Q packet... taken from
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
t/121t3/dtbridge.htm#xtocid114535

The tag is stored in the following two octets and it contains 3 bits of user
priority, 1 bit of Canonical Format Identifier (CFI) and 12 bits of VLAN ID
(VID). The 3 bits of user priority are used by the standard 802.1p; and the
CFI is used for compatibility reasons between Ethernet type networks and
Token Ring type networks. The VID is the identification of the VLAN, which
is basically used by the standard 802.1Q and, being on 12 bits, it allows
the identification of 4096 VLANs.


Brant I. Stevens
Internetwork Solutions Engineer
Thrupoint, Inc.
545 Fifth Avenue, 14th Floor
New York, NY. 10017
646-562-6540

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Gopinath Pulyankote
Sent: Wednesday, February 28, 2001 1:49 PM
To: [EMAIL PROTECTED]
Subject: BCMSN: VLAN ID How many bits? 10 or 15 ??


Hi all,
The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15 bits,
but I read somewhere else its 10 bits.
Which is correct ??
TIA
--Gopinath


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Re: Off Topic: Sniffing NetBIOS SMB Sessions

[Priscilla Oppenheimer]

is that it's the Sniffer saying "not enough data," rather than a NetBIOS or 
SMB process saying this. The Sniffer is seeing a different number of bytes 
than it expected to see based on its decode of the headers. Can you send us 
a printout of the offending packet? Thanks.

Priscilla

At 11:45 AM 2/28/01, Michael Linehan wrote:
>I need something answered and I hope someone can help me here. After all
>you guys/gals are the best. I am watching a file copy operation on a
>sniffer in a windows environment. I am constantly seeing a reference to
>an error and I am not sure what it means. In the summary window I have a
>line that reads:
>
>R=Read+X, Read 4096; Error-Not Enough Data!!!
>
>In the Packet window under the NetBIOS Service Session I see:
>
>  ***Mismatch --> Actual Data Length: 1456 bytes
>
>Does anyone have any idea what this means? I have seen the sequence
>virtually every time I see files copied in Windows. If I was to venture
>a guess it is NetBIOS way of saying that the file is too large for a
>single packet, I have to break it up into pieces to transmit.
>
>Am I right?
>
>Thanks gurus,
>Michael Linehan
>
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Priscilla Oppenheimer
http://www.priscilla.com

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New lab equipment

[Vik Evans]

Is any one looking to buy a router? I have a new 2610 and a Digital Link
CSU/DSU. About 8 months old, but only used by me for certs and only for
about 3 weeks.

Let me know.

Thanks,
[EMAIL PROTECTED]


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Re: 2500 series e0 fullduplex?

[Priscilla Oppenheimer]

At 07:41 AM 2/28/01, anthony kim wrote:
>Neil is correct. Fast ethernet can be used in a shared medium environment
>(repeaters, fast hubs) that don't support full-duplex.
>
>http://www.cisco.com/warp/public/cc/so/neso/lnso/lnmnso/feth_tc.htm

Nice paper. I just wanted to add my $.02 after seeing some of the other 
messages that garbled the issue. The speed of the connection (10Mbps, 
100Mbps, 1000Mbps) is not relevant to the question of whether one can use 
half or full duplex. IEEE standardized full duplex in 1997 for a variety of 
speeds and media.

If there are multiple stations sharing a medium (cable or hub), then you 
can't use full duplex. You must use CSMA/CD, which is also called 
half-duplex to distinguish it from the newer full duplex method. In a 
shared network, receiving while you're sending is normal, but it is also 
considered a collision. All stations must recognize the collision and the 
senders must back off, wait a random amount of time and resend.

If there are just two stations sharing the medium, you can usually use full 
duplex. For full duplex to work, each station must have a distinct transmit 
and receive path. (It wouldn't work on coax cable, for example, but it can 
work on UTP). In this case, receiving while you're sending is normal and is 
not a collision. The stations are connected back-to-back. The medium is not 
really shared, so collisions are not an issue. Examples include two 
switches connected together and a single end-station connected to a single 
port on a switch.

Regarding the original question, though I couldn't find a URL to confirm 
this, I don't think the Ethernet AUI port on the 2500 series Cisco router 
supports full duplex. I think the 2500 routers came out before full duplex 
Ethernet existed for one thing. Also, I doubt that it is possible to 
support full duplex with an AUI attachment. You would need a way to tell 
the transceiver to ignore collision detection, and that's probably not 
supported.

Hope that clear things up a bit.

Priscilla


>--- SAIF <[EMAIL PROTECTED]> wrote:
> > 100mbps is not ethernet be sure its fast ethernet ,also their is no
> > collisions in fast
> > ethernet ,its colliision free and this is only possible if u have one
> > way to send and
> > one way to recieve data simultaneously :) i am sure u got the idea
> > secondly in ethernet there are collisions and if there are colliisions
> > Can u use one to
> > send and one way to recieve simultaneously with collisions so if u cant
> > the result is
> > ethernet works in half duplex mode and fast ethernnet works in full
> > duplex
> > if u have any thing different than me plz share with us
> > waiting ur reply
> > Saif
> >
> > Neil Schneider wrote:
> >
> > > It is NOT true that ethernet is half and fastethernet is full duplex.
> > > Either 10Mbps or 100Mbps ehternet can be run in half or full duplex
> > mode.
> > > And offhand I don't know if the 2500 AUI port will do full ethernet.
> > >
> > > --
> > > Neil Schneider
> > > MCT  MCSE  CCSI  CCNP
> > >
> > > "SAIF" <[EMAIL PROTECTED]> wrote in message
> > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > NO ITS ETHERNET PORT AND WORKING HALF DUPLEX ONLY ,U SEE CISCO GIVES
> > > FASTETHERNET PORTS
> > > > SPECIALLY IN THEIR ROUTERS SPECIALLY IN 4XXX SERIES AND U KNOW
> > ETHERNET
> > > WORKS IN HALF
> > > > DUPLEX AND FASTETHERNET WORKS IN FULL DUPLEX  SO THE RESULT IS AUI
> > PORT IS
> > > HALF DUPLEX
> > > > ETHERNET NOT AUTO SENSE AND IF U WANT AUTOSENSE 10/100 BASE T  GO TO
> > ANY
> > > OTHER ROUTER
> > > > ,CHECK THE ROUTER;S MANUAL :)
> > > > HOPT IT WILL HELP
> > > > IS IT ?
> > > >
> > > > Turfis wrote:
> > > >
> > > > > Is the Ethernet AUI port on the 2500 series Cisco routers Full
> > Duplex
> > > > > compatible?  Does it autonegoiate?  Can you hard code the
> > interface for
> > > > > half/full/auto?  Thanks!




Priscilla Oppenheimer
http://www.priscilla.com

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NAT

[Nathan Chessin]

Hi everyone,

I would appreciate a little help.  The scenario is as follows:

There is a central site that has a server called Nate.  It has an ip address
of 179.x.x.x.  On the other side of a frame relay link is the branch office.
They want the server to appear local on their branch office network, but
they want both the source and destination addresses protected across the
frame.  Basically, we have a nat statement to to change both source and
destination address by saying

ip nat inside source static 134.x.x.x 220.x.x.x
ip nat outside source static 134.x.x.x 179.x.x.x

the problem is when a packet travels from the inside to the outside, routing
occurs first, so we need a static route (ip route 134.x.x.x x.x.x.x
200.x.x.x) to get to the next hop.  Is there any way I can force the router
to translate first and then route, in order to eliminate the static route?

Thanks

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Re: Traffic and Route Generator

[W. Alan Robertson]

Need more routes, so as to have a big honking routing table with with to filter
and redistribute?

Add static routes for networks and sub-nets, pointing them at null0.  This will
put them in your table, and give you a great way to experiment with filtering
and redistrbution, not to mention perfecting your summarization skills.

As for traffic generation, there are a number of commercial products, but I'd
recommend you get cozy with Linux.  I use Linux as a swiss-army knife.  There
are countless tools for it that do all manner of things.

If you want to put a load on one of your links, it's hard to beat:

'ping -f -s 1400 '

The '-f' switch means flood, which tells ping to send the next ping packet
immediately after sending the first, rather than waiting for the reply from the
previous ping.

The '-s 1400' switch sets the packet size to 1400, rather than the default
packetsixe of 64.

You can run this process to a bunch of destinations simultaneously.  This ought
to give you stressed WAN links, ethernet collisions, drops, retransmissions,
etc. etc.

Another great feature of Linux is the ability to use a regular computer as a
real live OSPF, BGP, RIP v1 or v2 peer.  It'll look like another vendor's box,
perhaps, but the Configuration interface for "Zebra" (Which provides the OSPF
and BGP stuff) mimics almost identically the syntax which you'd use on a Cisco
box.

Besides, aren't you tired of looking for the tftpd.exe file, and not having a
real DNS box nearby?  :)

Alan~

- Original Message -
From: "Daniel Cotts" <[EMAIL PROTECTED]>
To: "'Andrew Shappell'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Wednesday, February 28, 2001 1:07 PM
Subject: RE: Traffic and Route Generator


> http://www.antara.net/
> They position their product as an e-commerce site stressor. Might be worth
> checking.
>
> > -Original Message-
> > From: Andrew Shappell [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, February 28, 2001 10:43 AM
> > To: [EMAIL PROTECTED]
> > Subject: Traffic and Route Generator
> >
> >
> > Greetings,
> >
> >Can anybody recommend a good traffic generator and/or a good route
> > generator.  I need to do some QoS testing in a Lab
> > Environment and need
> > to generate lots of traffic.  Thanks...
> >
> > --
> > Andrew E. Shappell
> > CCNP & CCDP
> >
> > _
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > Report misconduct
> > and Nondisclosure violations to [EMAIL PROTECTED]
> >
>
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Re: OSPF design question re: location of Area Border Router

[Scott Jensen]

David, you put the ABR at the main location with one interface (usually LAN) in area 0
and the other in the area created for the remote location. All interfaces at the remote
location would then be associated with the area created for this new site. The ABR is
located at the main location because as you said you do not want to expand area 0 over
the WAN link.

Scott

"Hennen, David" wrote:

> Hi, I am preparing to bring up a new site in an ospf network.  The new site
> will be a training facility connected back to the main office by a t1.
> Currently we use OSPF and have everything in area 0, around 100 routers.
>
> I want to make this new site a different area and to make the new area a
> Totally Stubby Area.  We have two 7513 routers at the main office that
> handle all the wan traffic, the new remote office would connect to one of
> these.  The remote training office will have a 4500.
>
> One of my coworkers suggested that the 7513 at the main office should be the
> Area Border Router, because we should keep area 0 from being spread out over
> a bunch of wan links.  I had it in mind that the remote 4500 should be the
> ABR.  I don't have a strong reason for thinking that way.  The cpu of the
> 7513 runs between 20-30 % utilization according to snmp info.
>
> Are there any rules of thumb regarding this?  I looked through the Cisco
> OSPF network design book and can see some examples that support having the
> ABR at the main office.  Is that the accepted practice?  Are there any
> gotcha's to look out for?
>
> Thanks if you can help
> dave h
>
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Re: sorry

[John Neiberger]

I just checked this myself and there is an error on the page.  On the
jobs page, http://www.groupstudy.com/list/jobs.html, there is a link to
[EMAIL PROTECTED], but if you point to it without clicking, my
browser says that it is really "mailto:[EMAIL PROTECTED]".

>>> "Jillian Burdorf" <[EMAIL PROTECTED]> 2/28/01 11:46:39 AM >>>
I was trying to post a job to where it said to post jobs.  I must have
done
something wrong.  I did not mean to interrupt the technical
conversations.
Thank you to those of you who let me know that I didn't post the job
correctly.

I apologize again for any inconvenience.

Sincerely,

Jillian Burdorf
Recruiting Coordinator - HR Dept.
Sayers
Bay Data Consultants
847-391-4089 (office)
847-294-0765 (fax)
630-207-7346 (cell)

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RE: Help!

[Rizzo Damian]

No problem =)



-Original Message-
From: Mixa [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 28, 2001 1:50 PM
To: [EMAIL PROTECTED]
Subject: Re: Help!


You're the man! Thanks Damian. This really helps.

Mixa

"Rizzo Damian" <[EMAIL PROTECTED]> wrote in message
49C181ACF35ED311A7DC00508B5AF61102E52458@NAEXCHANGE">news:49C181ACF35ED311A7DC00508B5AF61102E52458@NAEXCHANGE...
> It's relatively easy. For example if you wanted to simulate a Frame Relay
> connection between the two routers via a DCE/DTE cable, you would
configure
> your routers as stated below;
>
>
>  Router 1 (the DCE end, provides clock at 64Kb, "clockrate 64000")
>
>
>
>
>interface Serial1
>
>no ip address
>
>encapsulation frame-relay
>
>clockrate 64000
>
>no keepalive
>
>interface Serial1.1 point-to-point
>
>ip address 131.108.177.164 255.255.255.0
>
>frame-relay interface-dlci 26 broadcast
>
>
>
>   Router 2
>
>
>
>
>interface Serial0
>
>no ip address
>
>encapsulation frame-relay
>
>no keepalive
>
>frame-relay intf-type dce
>
>interface Serial0.1 point-to-point
>
>ip address 131.108.177.166 255.255.255.0
>
>frame-relay interface-dlci 26 broadcast
>
>
>
>  -Thats it. Hope this helps.
>
>
> Damian Rizzo
> CCNA+ Security, CNE, MCP
>
>
>
> -Original Message-
> From: Mixa [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, February 28, 2001 1:24 PM
> To: [EMAIL PROTECTED]
> Subject: Help!
>
>
> Hello,
>
> I'm new to Cisco and just bought 2 2500Series routers to practice my CCNA.
> Could you please show me how to make 2 routers talk via a back to back
> cable?
>
> Thanks in advance!
>
> Mixa
>
> PS: I know I need to configure a DTE/DCE but I can't find where.
>
>
>
>
>
>
>
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>


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Re: re router bootup

[Suntian Song]

Try to disable flow control in your terminal software...

- Original Message -
From: nandit <[EMAIL PROTECTED]>
Newsgroups: groupstudy.cisco
To: <[EMAIL PROTECTED]>
Sent: Wednesday, February 28, 2001 02:57
Subject: re router bootup


> Hi group,
> my cisco 2600 and 2500 routers show the booting when i am connected to
> console but when the press return to get started comes on my console
ceases
> to function.I telnetted and checked config register as 0x2102
> I changed the config register to 0x2142 on one of my routers and now i get
> only the setup mode prompt and the console hangs after that> How can i
> resolve this
> Thanks
> Nandit
>
>
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Re: VoIP over Satellite link

[Gopinath Pulyankote]

Strange ! but I replied to this twice now, but still don't see it on the NG.
Why so
Did anyone else get my earlier posts?


"Robert Padjen" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> If your question is "Can I do VOIP over a satellite
> link?" I would think that one could not. The latency
> is so high that it would have to be an issue.
>
> If someone is doing it I'd be very interested in the
> configurations. It would really help a number of
> companies that I know.
>
>
> --- Ricardo Ciganda <[EMAIL PROTECTED]> wrote:
> > You only need IP Plus Feature to support VoIP
> > capabilities.
> >
> > Ricardo Ciganda
> > CCNA, CCDA, Security
> > BCMSN, BCRAN, CIT
> > Systems Engineer and Network Consultant
> > BYTEMASTER, S.A.
> > C/ Gran Capitan 2-4 4ª Planta
> > Barcelona, SPAIN 08034
> > [EMAIL PROTECTED]
> > Phone:  (+34) 93-2520540
> > Fax:(+34) 93-2520541
> >
> >
> > Ask me I won't say no, how could I?
> > The Smiths
> >
> >
> > -Mensaje original-
> > De: Amit Gupta [mailto:[EMAIL PROTECTED]]
> > Enviado el: miércoles, 28 de febrero de 2001 11:32
> > Para: [EMAIL PROTECTED]
> > Asunto: VoIP over Satellite link
> >
> >
> > Hi All,
> >
> > Help needed on the prerequisites in the form of IOS
> > for configuring VoIP over an International Leased
> > Private Circuit.
> > Do the Cisco Routers at both the sides have to have
> > a
> > minimum IOS version.
> > We are using the 3640 Router at both ends.
> >
> > Thanks & Regards
> >
> > Amit
> >
> >
> >
> >
> >
> > __
> > Do You Yahoo!?
> > Get email at your own domain with Yahoo! Mail.
> > http://personal.mail.yahoo.com/
> >
> > _
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to
> > [EMAIL PROTECTED]
> >
> > _
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to
> [EMAIL PROTECTED]
>
>
> =
> Robert Padjen
>
> __
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> Get email at your own domain with Yahoo! Mail.
> http://personal.mail.yahoo.com/
>
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Re: Free Cisco Router

[Joe Freeman]

I can have it picked up tomorrow night!

I'm in Monroe, but will have someone over there to do a turn up Thursday afternoon,
evening, and I could have them pick this up from you.

Thanks-
Joe Freeman, CCNA/CCDA

Brian wrote:

> thats right a free router.  Its a Cisco IGS (Dual Ethernet Router).  It
> has a dead fan in it. But you can get the Fans new from electronic houses
> like Newark and Digikey, etc.
>
> It still works, even with a dead fanjust gets a little hot.  Not
> sure of the mem config, I think the ios is 9.x or 10.x something like
> that.
>
> Anyways, all you have to do is pay shipping.  Its 14x13x4 and weighs
> 10-12lbs I would say.  No catches, a free router.
>
> If you aren't willing to pay shipping, please don't respond.  When you
> goto ups.com and plug in the above dimensions and weight, and zip codes (I
> am in 71101 shreveport, LA), I will charge you that exact amount plus $5
> (to cover my time to prep this and the cost of the box, penuts etc).
>
> Brian
>
> ---
> I'm buying / selling used CISCO gear!!
> email me for a quote
>
> Brian Feeny,CCDP,CCNP+VAS Scarlett Parria
> [EMAIL PROTECTED] [EMAIL PROTECTED]
> 318-222-2638 x 109318-222-2638 x 101
>
> Netjam, LLC   http://www.netjam.net
> 1401 Oden St.
> Suite 18
> Shreveport, LA 71104
> Fax 318-221-6612
>
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Re: Help!

[Mixa]

You're the man! Thanks Damian. This really helps.

Mixa

"Rizzo Damian" <[EMAIL PROTECTED]> wrote in message
49C181ACF35ED311A7DC00508B5AF61102E52458@NAEXCHANGE">news:49C181ACF35ED311A7DC00508B5AF61102E52458@NAEXCHANGE...
> It's relatively easy. For example if you wanted to simulate a Frame Relay
> connection between the two routers via a DCE/DTE cable, you would
configure
> your routers as stated below;
>
>
>  Router 1 (the DCE end, provides clock at 64Kb, "clockrate 64000")
>
>
>
>
>interface Serial1
>
>no ip address
>
>encapsulation frame-relay
>
>clockrate 64000
>
>no keepalive
>
>interface Serial1.1 point-to-point
>
>ip address 131.108.177.164 255.255.255.0
>
>frame-relay interface-dlci 26 broadcast
>
>
>
>   Router 2
>
>
>
>
>interface Serial0
>
>no ip address
>
>encapsulation frame-relay
>
>no keepalive
>
>frame-relay intf-type dce
>
>interface Serial0.1 point-to-point
>
>ip address 131.108.177.166 255.255.255.0
>
>frame-relay interface-dlci 26 broadcast
>
>
>
>  -Thats it. Hope this helps.
>
>
> Damian Rizzo
> CCNA+ Security, CNE, MCP
>
>
>
> -Original Message-
> From: Mixa [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, February 28, 2001 1:24 PM
> To: [EMAIL PROTECTED]
> Subject: Help!
>
>
> Hello,
>
> I'm new to Cisco and just bought 2 2500Series routers to practice my CCNA.
> Could you please show me how to make 2 routers talk via a back to back
> cable?
>
> Thanks in advance!
>
> Mixa
>
> PS: I know I need to configure a DTE/DCE but I can't find where.
>
>
>
>
>
>
>
> _
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
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>
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>


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RE: Help!

[Rizzo Damian]

It's relatively easy. For example if you wanted to simulate a Frame Relay
connection between the two routers via a DCE/DTE cable, you would configure
your routers as stated below;


 Router 1 (the DCE end, provides clock at 64Kb, "clockrate 64000")

   

   
   interface Serial1

   no ip address

   encapsulation frame-relay

   clockrate 64000

   no keepalive

   interface Serial1.1 point-to-point

   ip address 131.108.177.164 255.255.255.0

   frame-relay interface-dlci 26 broadcast

   

  Router 2

   

  
   interface Serial0

   no ip address

   encapsulation frame-relay

   no keepalive

   frame-relay intf-type dce

   interface Serial0.1 point-to-point

   ip address 131.108.177.166 255.255.255.0

   frame-relay interface-dlci 26 broadcast



 -Thats it. Hope this helps.


Damian Rizzo
CCNA+ Security, CNE, MCP



-Original Message-
From: Mixa [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 28, 2001 1:24 PM
To: [EMAIL PROTECTED]
Subject: Help!


Hello,

I'm new to Cisco and just bought 2 2500Series routers to practice my CCNA.
Could you please show me how to make 2 routers talk via a back to back
cable?

Thanks in advance!

Mixa

PS: I know I need to configure a DTE/DCE but I can't find where.







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Re: IOS Release Schedule

[Gernot W. Schmied]

Q4 2002 maybe ;-))

Gernot

Timothy Metz wrote:
> 
> Hi all,
> 
> There are features in 12.1 that could really help me out but our company
> policy is to only use GD releases in production equipment. Does anyone have
> any idea when 12.1 will go GD?
> 
> Thanks
> 
> Tim
> 
> _
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BCMSN: VLAN ID How many bits? 10 or 15 ??

[Gopinath Pulyankote]

Hi all,
The Cisco Press book BCMSN by Karen Webb says the VLAN ID is 15 bits,
but I read somewhere else its 10 bits.
Which is correct ??
TIA
--Gopinath


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Re: Help!

[Navin Parwal]

I hope that you have got the null modem cable , if you don't please get
that and connect that to the WAN port on both of the routers , one of it
will be DCE on which the clock rate has to be configured and the other will
act as a DTE for simulation purpose , assign the IP address to both of the
interface and try to ping at each other and at any other interface .

thats  it , all the best .

Navin Parwal



"Mixa" wrote in message <97jjo0$t5u$[EMAIL PROTECTED]>...
>Hello,
>
>I'm new to Cisco and just bought 2 2500Series routers to practice my CCNA.
>Could you please show me how to make 2 routers talk via a back to back
>cable?
>
>Thanks in advance!
>
>Mixa
>
>PS: I know I need to configure a DTE/DCE but I can't find where.
>
>
>
>
>
>
>
>_
>FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>




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