Re: PCAnywhere problem with ISDN Connection

[JCoyne]

The problem with VNC is it isn't encrypted. Someone can capture your
username, password and session data with a protocol analyser.


Natasha <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I've used PCAnywhere with several installations and found it to be
> nothing but problematic and bulky.
> Give VNC server a quick look-see. You'll find it to be smaller faster
> more secure and free.
> http://www.uk.research.att.com/vnc/winvnc.html
>
> Chris Wang wrote:
> >
> > I have a problem about the caption.  When performing ping from local
office
> > to the remote location, the ISDN connection is up and everything is
fine.
> > However, when I initiate a PCAnywhere connection from local to the
server
> > (remote),
> > the PCAnywhere connection is up for a while (less than a minute) and
then
> > hang up.
> > Pls. note that the ISDN connection is fine at that moment.
> >
> > Anyone experience the same problem before?
> >
> > _
> > FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
> --
> Natasha Flazynski
> 440.949.1399
> http://www.ciscobot.com
> My Cisco information site.
> http://www.botbuilders.com
> Artificial Intelligence and Linux development
> 
> A bus station is where a bus stops.
> A train station is where a train stops.
> On my desk, I have a work station...
>
> _
> 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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ISDN CONFIG FOR DIALING UP ISP

[kaushal Bhatt]

Hello,

What should be the configuration for ISDN BRI interfacae and DDR, when I =
have to dial-up ISP for getting connected to net, and the ISP will be =
assigning the IP-address through DHCP ?



Regards

Kaushal Bhatt
Systems Administrator
Thermax Systems & Software Ltd
www.thermaxsoftware.com


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Re: Worthless study material

[Jack W. Williams]

I concur on WanPro.  Almost every practice test I've tried has a few errors,
but most are pretty good anyway.
I wasn't thrilled with the Sygress/Osborne "Test Yourself" test, I thought
it had some pretty serious errors
when I was studying for CCNA.

- Original Message -
From: Daniel Fey <[EMAIL PROTECTED]>
Newsgroups: groupstudy.cisco
To: <[EMAIL PROTECTED]>
Sent: Friday, February 09, 2001 11:53 PM
Subject: Worthless study material


> I would like to start a new discussion link of worthless study
> material. I will begin with a CD of 900 practice questions from
> www.wanpro.com . The questions do not just have typos they
> also have bad answers. I only paid  Wanpro $14.95 via Amazon
> auction so I didn't send it back. I am used to seeing bad study
> material so I will use it anyway.
>  Please let me now what else sucks as I am going for CCNP and
> will be buying a lot starting Monday. My plan is to study for all 4
> exams before taking the first one.
>
>
> _
> 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: CID beta results

[donald . brown]

Cisco's Beta Exams page says:
"Beta exam results will be posted on the Cisco Career Certification Tracking
System approximately 8-12 weeks after the last day to test."
So we've got 0 to 4 weeks to go...
(I just checked and the results are not yet posted.)


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can the module of 7010 be used in 7500 or 7200?

[cslx]

thanx


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Re: BPX going out of style?

[John Nemeth]

 From what I see, there seems to be a lot of emphasis on GigE and
the very rapidly upcoming 10GigE combined with QOS now adays.  ATM
really doesn't seem to work that well with data (TCP/IP) and has a very
high overhead.  Ethernet is getting fast enough that when combined with
QOS it can easily handle voice and video as well as data.  Also,
ethernet is cheap, cheap, cheap; even GigE when you compare it with
ATM, and just about everybody knows how to handle ethernet, but ATM is
something that relatively few people know really well.

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RE: ISDN CONFIG FOR DIALING UP ISP

[Brian Dennis]

This should work for you.

Brian Dennis
CCIE #2210 (R&S)(ISP/Dial)
CCSI #98640


version 12.0
!
isdn switch-type basic-dms100
!
!
interface Ethernet0
 ip address 172.16.1.1 255.255.255.0
 ip nat inside
!
interface BRI0
 ip address negotiated
 ip nat outside
 encapsulation ppp
 load-interval 30
 dialer idle-timeout 600
 dialer string 800555
 dialer load-threshold 1 either
 dialer-group 1
 isdn switch-type basic-dms100
 isdn spid1 800555121201
 isdn spid2 800555121301
 no cdp enable
 ppp authentication chap callin
 ppp chap hostname YourISPUserName
 ppp chap password YourISPPassword
 ppp multilink
!
ip nat inside source list 1 interface BRI0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 BRI0
!
access-list 1 permit any
dialer-list 1 protocol ip permit
!


-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
kaushal Bhatt
Sent: Saturday, February 10, 2001 12:34 AM
To: [EMAIL PROTECTED]
Subject: ISDN CONFIG FOR DIALING UP ISP


Hello,

What should be the configuration for ISDN BRI interfacae and DDR, when I =
have to dial-up ISP for getting connected to net, and the ISP will be =
assigning the IP-address through DHCP ?



Regards

Kaushal Bhatt
Systems Administrator
Thermax Systems & Software Ltd
www.thermaxsoftware.com


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Re: PCAnywhere problem with ISDN Connection

[AABAN34]

   Why don't you try using Netmeeting, it's free. I would keep a ping running 
while your connected to the other side, while your using pcAnywhere, The 
connection might be dropping, lack of intresting traffic.  

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Re: BPX going out of style?

[Howard C. Berkowitz]

>  From what I see, there seems to be a lot of emphasis on GigE and
>the very rapidly upcoming 10GigE combined with QOS now adays.  ATM
>really doesn't seem to work that well with data (TCP/IP) and has a very
>high overhead.  Ethernet is getting fast enough that when combined with
>QOS it can easily handle voice and video as well as data.  Also,
>ethernet is cheap, cheap, cheap; even GigE when you compare it with
>ATM, and just about everybody knows how to handle ethernet, but ATM is
>something that relatively few people know really well.
>

In the IETF and similar forums, you'll often hear MPLS called "ATM 
without cells."  As transmission rates become faster, some of the 
problems that ATM was intended to solve go away. When an OC-192 (10 
Gbps) medium can send an entire frame faster than an OC-3 might send 
a cell or a few cells, the better interleaving of cells becomes a lot 
less important.

Also, forwarding components have been getting faster, and the fixed 
cell length is less important in achieving a fast forwarding rate. 
You still need to look at the IP header to set up MPLS label switched 
paths (LSP) and to assign a packet to a LSP at the edge, but label 
lookup and forwarding has comparable performance in ATM and MPLS.

Photonic switching, where traffic is rerouted based at the high-speed 
stream level rather than the packet or cell level, isn't here in 
production, but it is coming rapidly.  Photonic switching will 
complement, not replace, routing.  Please do not get me started on 
the buzzword of "optical routing."  With the capacity of newer 
optical transmission, bandwidth becomes much cheaper than forwarding 
logic, and some conventional bandwidth-conserving methods simply 
won't be important in large networks.

To give some perspective, OC-192 (approximately 10 Gbps) is getting 
to be reasonably standard in carrier networks. Juniper routers have 
had some lead on Cisco in doing efficient forwarding at these speeds.

The next speed level is OC-768 (approximately 40 Gbps).  Chip 
designers don't have immediate strategies for increasing single 
stream speed above this rate.

On the other hand, the Dense Wavelength Division Multiplexing (DWDM) 
people can carry multiple OC-192's and OC-768's on a single fiber, 
and switch these streams  today with partially photonic components. 
Transmission systems that can carry 160 OC-192's on a single fiber 
are commercially available, and my transmission colleagues tell me 
that 320 streams will be available in the near term. DWDM will be 
available for multiple OC-768's on the same fiber, and, of course, 
carriers install more than one fiber at a time.

For those of you that subscribe to IEEE Spectrum magazine, the 
current issue has some nice overview of these and other emerging 
technologies.

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Re: Win2k and PIX IPSec?

[Ben Hockenhull]

I did try to clear the sas on both sides, and it didn't seem to have an effect.

I'm using nat 0 so that the client on the inside is not NATted at the
external interface of the PIX, which would break the IPSec tunnel.  I am
using sysopt connection permit-ipsec, which does what you describe.

Ben

At 8:27 AM -0800 2/9/01, Kenny Sallee wrote:
>I've had that error before.  It was between 2 PIX's though.  The fix ( on
>both sides ) was to do a "clear crypto ipsec sa" and "clear crypto isakmp
>sa".  And then it worked.  It was like the SA's got outa sync or something.
>Or one side had a valid SA and the other didn't.  On a side note - have you
>tried to use 'pl-compatable' instead of NAT 0?  Pl-compat bypasses all
>translation and conduit requirements, effectivly terminating the tunnel on
>the inside interface or whichever interface the traffic is destined for.
>
>Kenny
>
>"Ben Hockenhull" <[EMAIL PROTECTED]> wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>> Has anyone sucessfully set up an IPSec tunnel between a Windows 2000
>> client running the native Win2k IPSec stack and a PIX?  If so, do you
>> have a sample config?
>>
>> I'm able to establish an SA between the PIX and the Win2k box, but I'm
>> unable to pass traffic.  For instance, a ping from inside the PIX to the
>> Win2k box outside the PIX results in an SA being established, but the
>> packets are not passed, and a debug shows a "check crypto map deny".
>>
>> The access lists for nat 0 and for the encrypted traffic are identical and
>> applied.
>>
>> Pix code 5.2.x.
>>
>> Thanks
>>
>> Ben
>>
>>
>> --
>> Ben Hockenhull
>> [EMAIL PROTECTED]
>>
>> _
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>http://www.groupstudy.com/list/cisco.html
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>>
>
>
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Are Traditional Routing Protocols going to DIE

[Santosh Koshy]

With new & emerging technologies like (Gig Eth, 10 Gig Eth, e.t.c), I am
beggining to wonder how scalable or well suited today's routing protocols
(OSPF, IGRP, EIGRP, e.tc. ) are to manage them effectively.

I stubled across something while reading about delay calculations on a IGRP
/ EIGRP network... maybe you guys can help..

The bandwith component of a metric is calculated by dividing 10,000,000 by
bandwith in Kbps.
Eth = 10,000,000 / 10,000 = 1000
Fast Eth = 10,000,000 / 100,000 = 100
Gig Eth = 10,000,000 / 1,000,000 = 10
10 Gig Eth = 10,000,000 / 10,000,000 = 1
New Fangled Eth (not yet invented) = 10,000,000 /  100,000,000 = 0.1

As you can see delay will be calculated in thousands of microseconds and we
end up getting fractional numbers.. I highly doubt  IOS can use
fractional numbers to calulate delay.. Are todays's routers capable of
making such calculations with an easy IOS upgrade

Thanks,
Santosh Koshy


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Back To Back ATM Test

[Muhammad Asif Rashid]

Dear All
I have to make a test lab for VoATM Test .Kindly let me know is it =
possible to connect Two NM1-ATM 25 (ofcourse with routers)  Modules by a =
crossover Cable without using atm switch.

Thanks in Advance.

regards


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Re: Are Traditional Routing Protocols going to DIE

[Howard C. Berkowitz]

Santosh Koshy  asked,

>With new & emerging technologies like (Gig Eth, 10 Gig Eth, e.t.c), I am
>beggining to wonder how scalable or well suited today's routing protocols
>(OSPF, IGRP, EIGRP, e.tc. ) are to manage them effectively.

I think you are making an inherent assumption that the ability to 
have precise metrics is essential to routing protocols.  That's less 
and less the case. There are, however, limiting factors for 
conventional IGPs.  My feeling is that they will continue to be 
evolved rather than be replaced by new paradigms.

First, bandwidth often is cheap, as in campus or photonic networks. 
Fine distinctions aren't that important.  Where there is a bandwidth 
limitation (e.g., wireless), there's a whole range of relevant 
techniques at all OSI layers.

Second, topology, in well designed networks, usually is more 
important than metric.

Third, static bandwidth and delay do not reflect utilization, and 
(E)IGRP style utilization at the link  level don't scale to routes of 
any complexity.  Traffic engineering extensions to OSPF and ISIS, or 
strategies like Optimized Multipath (OSPF-OMP, ISIS-TE) take a more 
reasoned view of reservation and utilization.

>
>I stubled across something while reading about delay calculations on a IGRP
>/ EIGRP network... maybe you guys can help..
>
>The bandwith component of a metric is calculated by dividing 10,000,000 by
>bandwith in Kbps.
>Eth = 10,000,000 / 10,000 = 1000
>Fast Eth = 10,000,000 / 100,000 = 100
>Gig Eth = 10,000,000 / 1,000,000 = 10
>10 Gig Eth = 10,000,000 / 10,000,000 = 1
>New Fangled Eth (not yet invented) = 10,000,000 /  100,000,000 = 0.1
>
>As you can see delay will be calculated in thousands of microseconds and we
>end up getting fractional numbers.. I highly doubt  IOS can use
>fractional numbers to calulate delay.. Are todays's routers capable of
>making such calculations with an easy IOS upgrade

In general, my feeling is that we will be more concerned with metrics 
as orders of magnitude rather than precise numbers that fit all. Yes, 
it's possible to have low-bandwidth radio links and GigE in the same 
network, but they are in different parts of the network and would be 
optimized locally.  For example, I dealt with one military network 
where the 2.4 Kbps tactical radio links needed some optimization due 
to very low bandwidth, but this optimization needed to take place at 
the access tier.  Once they were into the fixed network, in 
comparison with 2.4 vs. 4.8 Kbps (poor vs. better radio), the 10-1000 
Mbps Ethernets were effectively infinite resources.

Now, there are issues, and controversial ones, with convergence time. 
Current IGP's typically reconverge in tens of seconds, which is too 
slow for certain services such as voice call setup.  In other 
services, nothing is broken.  A good summary of some issues in 
speeding IGP convergence, specifically for ISIS but generally 
applicable, is http://www.nanog.org/mtg-0010/igp.html

Fast response to convergence may be OK in an IGP, but, in the context 
of the global Internet, may contribute to instability.  There is much 
controversy and theoretical work going on in global BGP convergence. 
See http://www.nanog.org/mtg-0010/labovitz.html.  Some of the 
complexities being explored in the research community deal variously 
with BGP's path vector algorithm itself, with the issue of 
constraint-based BGP routing (path vector can be guaranteed to 
converge only when additional constraints, such as AS path length and 
MED, are not considered), and operational use of constraints and 
policies.

  Single router BGP convergence is a related but different problem I'm 
working on defining, see my rough draft at 
http://www.ietf.org/internet-drafts/draft-berkowitz-bgpcon-00.txt.


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Re: Are Traditional Routing Protocols going to DIE

[Yonkerbonk]

I'm not sure increased bandwidth would affect routing
policy. That's an interesting question though.
As far as the granularity of the delay formula, they
will probably do the same as they did with calculating
Spanning-Tree path costs. With the old calculations
(1000MB/Bandwidth), Fastethernet would be 10
(1000/100) and anything a Gig or higher would be 1 or
fractional. So they instituted non-linear numbers such
as a cost of 19 for a 100MB link and 4 for a 1 GB link
and 2 for a 10 GB link.
I would like to hear discussions about the first part
of the question though.

Michael

--- Santosh Koshy <[EMAIL PROTECTED]> wrote:
> With new & emerging technologies like (Gig Eth, 10
> Gig Eth, e.t.c), I am
> beggining to wonder how scalable or well suited
> today's routing protocols
> (OSPF, IGRP, EIGRP, e.tc. ) are to manage them
> effectively.
> 
> I stubled across something while reading about delay
> calculations on a IGRP
> / EIGRP network... maybe you guys can help..
> 
> The bandwith component of a metric is calculated by
> dividing 10,000,000 by
> bandwith in Kbps.
> Eth = 10,000,000 / 10,000 = 1000
> Fast Eth = 10,000,000 / 100,000 = 100
> Gig Eth = 10,000,000 / 1,000,000 = 10
> 10 Gig Eth = 10,000,000 / 10,000,000 = 1
> New Fangled Eth (not yet invented) = 10,000,000 / 
> 100,000,000 = 0.1
> 
> As you can see delay will be calculated in thousands
> of microseconds and we
> end up getting fractional numbers.. I highly
> doubt  IOS can use
> fractional numbers to calulate delay.. Are
> todays's routers capable of
> making such calculations with an easy IOS
> upgrade
> 
> Thanks,
> Santosh Koshy
> 
> 
> _
> 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: 2900XL

[Nick Brooks]

Standards don't offer ISL support, can't act as a cluster commander, etc.


Kazumi Ono wrote:

> what is the difference between the Catalyst 2900 XL Enterprise version and
> non-enterprise version?
> can i run ISL on the non enterprise one?
>
> thanks in advance
>
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Re: Worthless study material

[anthony kim]

I would be interested to know if you find studying for all exams
before taking any is helpful or not. I've always been the tackle one
at a time kind of guy, but that's strictly for sanity's sake.


--- Daniel Fey <[EMAIL PROTECTED]> wrote:
>  I would like to start a new discussion link of worthless study
> material. I will begin with a CD of 900 practice questions from
> www.wanpro.com . The questions do not just have typos they
> also have bad answers. I only paid  Wanpro $14.95 via Amazon
> auction so I didn't send it back. I am used to seeing bad study
> material so I will use it anyway.
>  Please let me now what else sucks as I am going for CCNP and
> will be buying a lot starting Monday. My plan is to study for all 4
> exams before taking the first one.
> 
> 
> _
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to
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Re: PCAnywhere problem with ISDN Connection

[anthony kim]

ssh tunneling can handle it. Although I found pcA faster with better
screen refresh rates etc. Our developers like the file transfer
capability of pcA as well.


--- JCoyne <[EMAIL PROTECTED]> wrote:
> The problem with VNC is it isn't encrypted. Someone can capture
> your
> username, password and session data with a protocol analyser.
> 
> 
> Natasha <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > I've used PCAnywhere with several installations and found it to
> be
> > nothing but problematic and bulky.
> > Give VNC server a quick look-see. You'll find it to be smaller
> faster
> > more secure and free.
> > http://www.uk.research.att.com/vnc/winvnc.html
> >
> > Chris Wang wrote:
> > >
> > > I have a problem about the caption.  When performing ping from
> local
> office
> > > to the remote location, the ISDN connection is up and
> everything is
> fine.
> > > However, when I initiate a PCAnywhere connection from local to
> the
> server
> > > (remote),
> > > the PCAnywhere connection is up for a while (less than a
> minute) and
> then
> > > hang up.
> > > Pls. note that the ISDN connection is fine at that moment.
> > >
> > > Anyone experience the same problem before?
> > >
> > > _
> > > FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> > > Report misconduct and Nondisclosure violations to
> [EMAIL PROTECTED]
> >
> > --
> > Natasha Flazynski
> > 440.949.1399
> > http://www.ciscobot.com
> > My Cisco information site.
> > http://www.botbuilders.com
> > Artificial Intelligence and Linux development
> > 
> > A bus station is where a bus stops.
> > A train station is where a train stops.
> > On my desk, I have a work station...
> >
> > _
> > 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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Networkers toolkit question

[Natasha]

Hi gang,
It's time for me to get my own toolkit for network testing and such.
Been using odds and ends long enough and it just doesn't look that
professional.
I've been to the http://www.jensentools.com/ site and looked at some of
the network testers 2 grand and up! Way out of my range here.
Then I found this kit http://www.milestek.com/theultimateLANkitII.htm
Under 700.00 that's a little more like it!
Would this kit do the job for LAN testing?
What I'm looking for is something that would be a good all around
package and the best bang for my buck.

What do you folks use?
Thanks 

-- 
Natasha Flazynski
http://www.ciscobot.com
My Cisco information site.
http://www.botbuilders.com 
Artificial Intelligence and Linux development 

A bus station is where a bus stops.
A train station is where a train stops.
On my desk, I have a work station...

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Re: T1 Link

[Marty Adkins]

Priscilla Oppenheimer wrote:
> 
> Yup, SLARP is pretty cool. It's one good reason to use HDLC. It makes
> configuration so easy. Also, the students will love saying SLARP. I'm
> helping out with the academy at our local high school, as I've mentioned
> before. Those students will love saying SLARP, over and over and over again.
> 
Unless autoinstall has changed in the last year or so, it used to first
try HCLC, then PPP, then Frame Relay, and I think there was a forth one.
Yes, SLARP is very cool... when you want it.  When you don't, it sure
adds a bunch of time -- if the SLARP succeeds, then IOS gets very patient
broadcasting rDNS, TFTP, etc. etc.

> I'm having a hard time, in general, teaching networking to kids who don't
> really love it and don't have to know it for their jobs. I got spoiled,
> teaching classes to people who had paid money to be there and needed the
> info to survive on the job. I'm sure it's quite different at a community
> college, but you probably get some young people too. Any advice?? Thanks!
> 
Hmmm, tell them you're going to teach them TCP/IP operation so they can
learn how to tweak their TCP stack and soup up those Napster downloads!
:-)  :-)

- Marty

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How does one decipher switch back plane numers....

[Santosh Koshy]

I have seen switches being advertised saying (10gb backplane, 1Gb backplane,
e.t.c.)

Q) What does this number actually mean?

Q) How do they come up with this figue?

Q) What do they mean by active backplane and passive backplane and which is
better?

Thanks,
Santosh Koshy




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Re: OSPF: ASBR/ABR

[Peter Van Oene]

This isn't really a fair question.  We'd need to know things like the current load on 
the router, other processes/protocols running, memory, link state database size, area 
size etc.  

*** REPLY SEPARATOR  ***

On 2/9/2001 at 10:27 AM West, Karl wrote:

>Need suggestion:
>
>Has anyone ever implemented OSPF where they had their router been an ASBR
>and a ABR at the same time and if so was there any problems? I have to
>connect a non OSPF router to my AGG router (ABR). I really don't want to do
>any redistribution on the ABR routers but the powers that be are cheap :-)
>Before I even go into the lab I just want to get some feed back from anyone.
>
>Thanks
>Karl
>
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Re: Spanning Tree Question - Root Port Selection

[ciscolab]

Nathan,

Check the original paper by Radia Perlman, or better yet have a read of
Chapter 3 of her book "Interconnections - Bridges, Routers, switches and
Internetworking Protocols" 2nd Edition.

Serge :)

- Original Message -
From: "Miller, Nathan - BSC" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 06, 2001 2:08 PM
Subject: Spanning Tree Question - Root Port Selection


> I have been looking for a while for further documentation of the process
by
> which a switch selects its root port.  Most of the books that I have
> searched for this information say something similar to the following quote
> from a CCO page: "A bridge's root port is the port through which the root
> bridge can be reached with the least aggregate path cost, a value that is
> called the root path cost."  My problem is that they all seem to stop
there.
> My question is this.  If the root path cost is the same on multiple switch
> ports, how does STA determine which is the root port?  Does it follow the
> same course as it would when selecting a designated port (root bridge,
root
> path cost, sender ID, sender port).
> Many thanks for your thoughts.
> Nathan Miller
>
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IP Multicast Addressing

[Circusnuts]

I'm reading through McGraw Hill's BUMS book.  Chapter 7 deals with IP =
Multicast Addressing.  I understand that class D addresses are used =
(high order bits set to 1110), but a statement used in the book confuses =
me:

IP Multicast addresses start with 224.0.0.0 and end with 239.255.255.255

I'm not real keen on where the 239 came from...

Thanks All !!!
Phil=20

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IP Multicast Addressing (corrected typo)

[Circusnuts]

I've not read the McGraw Hill's BUMS book yet :-)


I'm reading through McGraw Hill's BCMSN book.  Chapter 7 deals with IP =
Multicast Addressing.  I understand that class D addresses are used =
(high order bits set to 1110), but a statement used in the book confuses =
me:

IP Multicast addresses start with 224.0.0.0 and end with 239.255.255.255

I'm not real keen on where the 239 came from...

Thanks All !!!
Phil=20

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Signs of LANE Incompatability (Nortel & Cisco) ???

[Circusnuts]

I have "ZERO" experience in this arena...  here goes.  I believe I'm
seeing the result of compatibility issues between Nortel equipment
(Centillion LANE switches) & Cisco gear (7513).  This setup has existed
for some time with version 11.1 IOS on the 7500.  I'd been told stories from
veterans of the IT department, stating the 11.1 could never be changed due
to communication issues between the Nortel & Cisco boxes.  We'll- the day
had come to retire the AIP's (switching to VIP's & PA's) & move from an RSP2
to an RSP4 (both not recognizable to 11.1 IOS).  Of course- I now have
unstable LANE services (with NO indications of trouble on the 7500).
Process CPU, Memory, Show LANE...  everything is perfect on the Cisco side,
but the Centillions are dropping throughout the building (proir to this, the
RSP2 was saturated- so that issue has changed for the good)  The obvious
conclusion is for me to trouble shoot the Nortel equipment.  My "BIGGEST" of
questions here is... where would one start when looking for incompatibility
issues ???

Generally- what are the "tell-tail- signs ???"

Are the clues usually that nothing appears to be wrong, but everything "IS"
 wrong ???

 Thanks All !!!
Phil

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FW: IP Multicast Addressing

[mmeridius]

I'm just a little CCNA, I don't know what IP multicasting is (yet!),
but I believe class E networks have 4 higher order bits set to 1,
ie 240 - which explains why Class D's end at 239.255.255.255

(I think!)

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Circusnuts
Sent: 10 February 2001 16:43
To: [EMAIL PROTECTED]
Subject: IP Multicast Addressing


I'm reading through McGraw Hill's BUMS book.  Chapter 7 deals with IP =
Multicast Addressing.  I understand that class D addresses are used =
(high order bits set to 1110), but a statement used in the book confuses =
me:

IP Multicast addresses start with 224.0.0.0 and end with 239.255.255.255

I'm not real keen on where the 239 came from...

Thanks All !!!
Phil=20

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VLAN design + web caching help !

[Moiz Badr]

Hi, I have some quetions, I hope somebody will me out. Here is what I am
trying to do:


 Cat 4006 3 vlans> Cisco 500 web Caching>2621
T1-->Internet

For about 500 users divided into 3 vlans, no routing between the vlans
required, here what I have in mind for implementing such a design. =
Configure
3 vlans on 4006, trunked to subinterfaces on the 2621, access list to =
not to
route bet the 3 vlans, my questions
1- Any performance issues with  the 3vlans + the access list on 2621
2- Any known issues with the Cisco's 500 ser. web cache
3- Any ideas
Thanks for your help
Mo



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RE: Networking White Papers (NAP and BGP)

[Hinton Bandele-NBH281]

As defined in the industry, a Network Access Point (NAP) is a major connection point 
in the global Internet.  It is like a Point-of-Presence (POP) but it is high 
bandwidth.  Currently there are 5 major NAP in the US, but I need white papers on the 
construction of these major POPs.  Hope that helps!

-Original Message-
From: Peter Van Oene [mailto:[EMAIL PROTECTED]]
Sent: Saturday, February 10, 2001 1:01 PM
To: Hinton Bandele-NBH281
Subject: Re: Networking White Papers (NAP and BGP)


What exactly do you consider a NAP to be?  

*** REPLY SEPARATOR  ***

On 2/9/2001 at 9:14 AM Hinton Bandele-NBH281 wrote:

>I am setting up a NAP using 3600's and need a site or location for obtaining 
>whitepapers on both NAP's and BGP.  I am going to use BGP for router redundancy 
>across multiple ISPs.  Where can I find these whitepapers on these two subjects?
>
>Thanks!
>
>Bandele Hinton
>Motorola Corporation
>630-353-8286 (office)
>877-992-7925 (pager)
>[EMAIL PROTECTED]
>
>
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Re: IP Multicast Addressing

[Circusnuts]

Class D's have 1110 (which add up to 224) being the high order bits.  You
may be onto something...  but how would you explaining the 239.255.255.255
subnet mask.  This is where I drop into the "hu" faze.

Thanks Tim
Phil

- Original Message -
From: "Tim" <[EMAIL PROTECTED]>
To: "Circusnuts" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Saturday, February 10, 2001 6:20 PM
Subject: RE: IP Multicast Addressing


> I'm just a little CCNA, I don't know what IP multicasting is,
> but I believe class E networks have 4 higher order bits set to 1,
> ie 240 - which explains why Class D's end at 239.255.255.255
>
> (I think!)
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> Circusnuts
> Sent: 10 February 2001 16:43
> To: [EMAIL PROTECTED]
> Subject: IP Multicast Addressing
>
>
> I'm reading through McGraw Hill's BUMS book.  Chapter 7 deals with IP =
> Multicast Addressing.  I understand that class D addresses are used =
> (high order bits set to 1110), but a statement used in the book confuses =
> me:
>
> IP Multicast addresses start with 224.0.0.0 and end with 239.255.255.255
>
> I'm not real keen on where the 239 came from...
>
> Thanks All !!!
> Phil=20
>
> _
> 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: loadbalancing with NIC's

[Bob Vance]

>But, upon reflection, I'm thinking that devices seeing the
>ARP reply are supposed to clear or update their cache if they have a
>different MAC cached (I'm too lazy to go look at the RFC).

Actually, this makes no sense -- the ARP reply isn't a broadcast :|

So I wonder why it wouldn't work for both NICs to reply.

What happens when a requestor sees two replies to an ARP request ?
Does he accept the first and drop the second?
Accept the first, use it for his original IP packet, then update his ARP
cache with the second reply and subsequent packets use the second
MAC address?


-
Tks        | 
BV     | 
Sr. Technical Consultant,  SBM, A Gates/Arrow Co.
Vox 770-623-3430   11455 Lakefield Dr.
Fax 770-623-3429   Duluth, GA 30097-1511
=





-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Bob Vance
Sent: Friday, February 09, 2001 5:27 PM
To: CISCO_GroupStudy List (E-mail)
Subject: RE: loadbalancing with NIC's


> Otherwise, the 802.1D spanning tree algorithm will block more
>than one card;

I don't think that this is correct (yikes !! :)
If the server is not acting as a bridge how could the two connections
matter, vis-a-vis STP.

In fact, Intel touts just a solution with their NIC "teaming" concept,
without FEC (although they also support that).  They support their
2-port adapters as well as separate adapters -- in fact, IIRC, they
don't even have to be the same speed !.  In their solution, though, the
load balancing is on output only, implying that the "primary" NIC is the
only one that answers ARPs.  The "teaming" also supports automatic
failover upon NIC port failure.

This relates to a scenario I described a short while back, the only
difference being that the 2 ports on the (NT) server were connected
to different switches (which addresses your concern about the single
point of failure at the switch).

I had raised a question as to why both NICs couldn't answer and get some
kind of load balancing on the input, as well.  I got no response from
the list.  But, upon reflection, I'm thinking that devices seeing the
ARP reply are supposed to clear or update their cache if they have a
different MAC cached (I'm too lazy to go look at the RFC).  Thus there
could be a wholotta ARPing going on.

Comments?



-
Tks        | 
BV     | 
Sr. Technical Consultant,  SBM, A Gates/Arrow Co.
Vox 770-623-3430   11455 Lakefield Dr.
Fax 770-623-3429   Duluth, GA 30097-1511
=





-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Howard C. Berkowitz
Sent: Friday, February 09, 2001 4:02 PM
To: [EMAIL PROTECTED]
Subject: Re: loadbalancing with NIC's


>We are planning to connect a server with a single   NIC that supports
>faultolerance , redudndancy and load balancing.  How does a C6509 treat
a
>Nic that is connected to two of its ports (same vlans)
>Mo Durrani


Multiple Fast EtherChannel aware NICs can load-share on the same
VLAN.  Otherwise, the 802.1D spanning tree algorithm will block more
than one card; you will get failover but no load distribution.

By putting them into different VLANs, you can get load-sharing,
assuming, of course, that the higher layers know how to distribute
the load.   The ideal situation is that your clients could be
configured with primary and secondary server addresses.

At some point, you need to consider, in your fault tolerance model,
what to do if either the server or the 6509 itself fails.  Frankly,
I'd consider isolated NIC failures less likely than either of these
cases. Other people may have different experience.

If you are going to have different NICs, do consider running them to
different wire closets, or otherwise maximizing cable plant
diversity. Never underestimate the power of a less than clueful
wiring technician.

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A inquiry about ARP behavior, vendors, and differences

[Raj Singh]

NOTE: Long email / question ... regarding ARP and Proxy ARP behavior with
different vendors OS.

A inquiry about ARP behavior, vendors, and differences.

Does the way a host machine behave during the ARP process differ amongst
different OS manufacturers, in relationship to when Proxy ARP can be
implement and when it can't be.

This inquiry should not be mistaken with "is proxy ARP a good idea or bad
idea" question. I just want to find some behavior facts out. Thanks.

Given the following situation:

 ClientA   ClientB
  |  |
||
 |
 |
 X
 {ROUTER}
 Y
  |
  |
|-|
|
 ClientC

Settings:

ClientA: 192.168.12.5 /24
ClientB: 192.168.12.6 /24
ClientC: 192.168.20.101 /24

Interface X on Router: 192.168.12.1 /24
Interface Y on Router: 192.168.20.1 /24
Proxy ARP enabled on both router interfaces

None of the clients have been configured with a default gateway setting.

The operating systems are Windows 98. (Though if you prefer you can say it
is NT 4.0)

The basic statement that I have a question about:

According to Jeff Doyle's Routing TCP/IP vol. 1, book on page 69-70 in
quotes below -

"... For example, a host 192.168.12.5/24 needs to send a packet to
192.168.20.101/24, but is not configured with default gateway information
and therefore does no know how to reach a router. It may issue an ARP
request for 192.168.20.101; the local router, receiving the request and
knowing how to reach network 192.168.20.0, will issue an ARP reply with it's
own data link identifier in the hardware address field. In effect, the
router has tricked the local host into thinking that the router's interface
is the interface of 192.168.20.101. All packets destined for that address
will be send to the router. ..."

The question itself:

The question I have with this is that under a Windows environment at least
in my experience, The decision making process is as follows when trying to d
o an address resolution (ARP Request).

Sender looks at it's own IP address and Subnet Mask compares it to the
target machines IP address to determine if on the same subnetwork. If it is
so . an ARP request is issued. But if the Sender's IP address and the Target
's IP address are not part of the same subnetwork . the sending machine
looks for it's default gateway and does an ARP request for it.

Thus the problem is . if there is no default gateway setup for the sender .
It won't even attempt to do an ARP request . it will IMMEDIATELY say .
Destination host unreachable.

Demonstration 1:

ClientA: 192.168.12.5 /24 PINGSClientC: 192.168.20.101 /24

Notice in the PING results below, where Client A pinging Client C, with the
start and end time there is only a 6/100ths of a second difference from the
start of the ping statement to it informing us no can do. Also note with a
sniffer on the line there are no packets generated either from the pinging
machine.

Current time is  4:25:34.81p  <-- Start Time

Pinging 192.168.20.101 with 32 bytes of data:

Destination host unreachable.
Destination host unreachable.
Destination host unreachable.
Destination host unreachable.

Ping statistics for 192.168.20.101:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum =  0ms, Average =  0ms
Current time is  4:25:34.87p <-- End Time

--

Demonstration 2:

ClientA: 192.168.12.5 /24 PINGS192.168.12.88 (non-existent client)

On the other hand if Client A attempts to ping a machine that it believes
has an IP address on the same subnet the following results would occur.
(Given the IP address being pinged is actually in the range of valid address
for that subnet ... but is not in use at the current moment).

You would get the message "Request timed out". By the way notice the start
and end time below. I can show a sniffer capture also .. but won't . there
are actual packets that left the pinging machines interface (ARP requests).

Current time is  4:28:11.41p <-- Start time

Pinging 192.168.12.88 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 192.168.12.88:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum =  0ms, Average =  0ms
Current time is  4:28:29.09p <-- End Time



Demonstration 3:

ClientA: 192.168.12.5 /24 PINGSClientB: 192.168.12.6 /24

A normal ping on the same subnet, works as expected.

Current time is  5:26:32.85p

Pinging 192.168.12.6 with 32 bytes of data:

Reply from 192.168.12.6: bytes=32 time=1ms TTL=128
Reply from 192.168.12.6: bytes=32 time<10ms TTL=128
Reply from 192.168.12.6: bytes=32 time<10ms TTL=128
Reply from 192.168.12.6: bytes=32 time<10ms TTL=128

Ping statistics for 192.168.12.6:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times 

Re: T1 Link

[Priscilla Oppenheimer]

Yes, it's definitely worth mentioning that SLARP can be a pain, especially 
in a lab environment or training classroom. You connect two routers 
together over a serial back-to-back cable. Turn on one router and configure 
the IP address and subnet mask. Turn on the other router, and if you're not 
quick, the darn thing will SLARP. Then it sits there forever (seems like 
forever at least), doing reverse DNS to find its name, and trying to find a 
TFTP server to download the rest of its config. To make matters worse it 
puts the "service config" command in the config file, which causes it to 
look for a server every time you reboot (if you save the config).

A few times a month we get the question about the router looking for its 
config from a server. The answers always say to add "no service config" to 
your config, but the answers don't explain how the annoying "service 
config" line got in your config to start with. It's probably that slippery 
SLARP.

To be totally accurate, it's AutoInstall that does this, but that's not s 
fun to say. &;-) SLARP is one component of AutoInstall in an HDLC 
environment. AutoInstall can also work with Frame Relay, Ethernet, Token 
Ring, and FDDI, according to the doc here:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/fun_c/fcprt1/fccfgtoo.htm

Thanks for the great ideas on making TCP more relevant to my students, 
Marty. Offline, if you get a chance, could you tell me more about tweaking 
your TCP stack on Windows? Thanks.

Priscilla

At 12:37 PM 2/10/01, Marty Adkins wrote:
>Priscilla Oppenheimer wrote:
> >
> > Yup, SLARP is pretty cool. It's one good reason to use HDLC. It makes
> > configuration so easy. Also, the students will love saying SLARP. I'm
> > helping out with the academy at our local high school, as I've mentioned
> > before. Those students will love saying SLARP, over and over and over 
> again.
> >
>Unless autoinstall has changed in the last year or so, it used to first
>try HCLC, then PPP, then Frame Relay, and I think there was a forth one.
>Yes, SLARP is very cool... when you want it.  When you don't, it sure
>adds a bunch of time -- if the SLARP succeeds, then IOS gets very patient
>broadcasting rDNS, TFTP, etc. etc.
>
> > I'm having a hard time, in general, teaching networking to kids who don't
> > really love it and don't have to know it for their jobs. I got spoiled,
> > teaching classes to people who had paid money to be there and needed the
> > info to survive on the job. I'm sure it's quite different at a community
> > college, but you probably get some young people too. Any advice?? Thanks!
> >
>Hmmm, tell them you're going to teach them TCP/IP operation so they can
>learn how to tweak their TCP stack and soup up those Napster downloads!
>:-)  :-)
>
>- Marty




Priscilla Oppenheimer
http://www.priscilla.com

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RE: Networking White Papers (NAP and BGP)

[Howard C. Berkowitz]

>As defined in the industry, a Network Access Point (NAP) is a major 
>connection point in the global Internet.  It is like a 
>Point-of-Presence (POP) but it is high bandwidth.  Currently there 
>are 5 major NAP in the US, but I need white papers on the 
>construction of these major POPs.  Hope that helps!

NAP is a historical term for what more frequently is called an 
exchange point; there are many more than five in the US and indeed an 
increasing number worldwide.  There's normally a panel discussion on 
"news from the exchanges" at each NANOG meeting 
(http://www.nanog.org), and there are exchange working group meetings 
at the RIPE meetings for Europe (http://www.ripe.net)  Before even 
beginning to think about designing an exchange or carrier-grade POP, 
be very familiar with the NANOG and RIPE meeting presentations and 
with their mailing list minutes.

Cisco has some good references:

ISP Essentials Power Session
 
http://www.cisco.com/public/cons/isp/documents/IOSEssentials_Seminar.zip

BGP Routing Workshop
 
http://www.cisco.com/public/cons/workshops/bgp/

I discuss some aspects of exchange points in my BGP tutorial series 
at http://www.certificationzone.com.  This coming weekend, at NANOG 
in Atlanta, I'll be doing an exterior routing tutorial that will 
partially discuss exchanges and POPs. Slides should be up by Sunday. 
The presentations may be webcast, but I'm not sure. Check the NANOG 
site.

The classic exchange point design features a carrier-grade physical 
facility, racks for the individual providers' routers, and a common 
layer 2 (sometimes layer 3) fabric to interconnect them.  In the 
original NAPs, the providers often kept the BGP workload down by not 
having a direct BGP connection to every other provider there, but to 
one or more route servers -- BGP code running on UNIX boxes that do 
no forwarding, but build the maps of the exchange point. Today, there 
is less emphasis on the route servers for primary BGP, but there is 
still peering to them for statistics gathering.

Some exchanges use a distributed switched fabric, so there is not one 
physical room.  Instead, the participating providers are linked by 
ATM.

It's something of an urban legend that the top-level providers do 
significant traffic exchange at the exchange points.  At that level, 
they are far more likely to have private peerings over direct OC-3 or 
faster links.  Exchange points, however, are useful for medium level 
providers in a given urban or geographic area.  Indeed, there is an 
ever-growing trend to having metropolitan exchange points among 
cooperating ISPs in small cities.

The traditional exchange is for ISPs only, but the line between 
hosting centers and exchanges is constantly getting more blurry.

Large provider POPs are not necessarily smaller than exchanges, but 
simply have a different management and operational model.

I don't want to be negative, but if someone hasn't been playing in 
the ISP area for a while, is familiar with the NANOG/RIPE materials, 
etc., they aren't remotely ready to design a carrier-grade POP or 
exchange by themselves.  Cisco consulting engineers, and I'd assume 
Juniper as well, can be very helpful when such a project is being 
considered.

>
>-Original Message-
>From: Peter Van Oene [mailto:[EMAIL PROTECTED]]
>Sent: Saturday, February 10, 2001 1:01 PM
>To: Hinton Bandele-NBH281
>Subject: Re: Networking White Papers (NAP and BGP)
>
>
>What exactly do you consider a NAP to be? 
>
>*** REPLY SEPARATOR  ***
>
>On 2/9/2001 at 9:14 AM Hinton Bandele-NBH281 wrote:
>
>>I am setting up a NAP using 3600's and need a site or location for 
>>obtaining whitepapers on both NAP's and BGP.  I am going to use BGP 
>>for router redundancy across multiple ISPs.  Where can I find these 
>>whitepapers on these two subjects?
>>
>>Thanks!
>>
>>Bandele Hinton
>>Motorola Corporation
>  >630-353-8286 (office)
>>877-992-7925 (pager)
>>[EMAIL PROTECTED]
>>
>>
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Re: **Pix Firewall

[ML]

Try www.CDW.com, but I think a 525 runs about 14-20K but that is not with
redundany or additional Net cards..


Deepak Sharma <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> does anyone have any prices on PIX firewalls?520, 525, and 535.
>
> Im looking to buy, but I cant find prices on the cisco website.if
> someone has them in Canadian dollors, that'll be awesome!
>
> thanks
> Deepak
>
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Re: A inquiry about ARP behavior, vendors, and differences

[Priscilla Oppenheimer]

At 05:35 PM 2/10/01, Raj Singh wrote:
>NOTE: Long email / question ... regarding ARP and Proxy ARP behavior with
>different vendors OS.
>
>A inquiry about ARP behavior, vendors, and differences.
>
>Does the way a host machine behave during the ARP process differ amongst
>different OS manufacturers, in relationship to when Proxy ARP can be
>implement and when it can't be.

Yes. You would have to do some testing to determine which ones ARP for 
non-local stations and which don't. (It sounds like you already did some 
testing.) When I used to teach the CIT class, one of the "bugs" we inserted 
was to remove the default gateway in the PC. The goal was to make it 
impossible for the PC to reach non-local stations. We also had to insert 
"no proxy arp" in the router config, because sometimes removing the default 
gateway didn't cause a problem. We were at the mercy of whatever TCP/IP 
implementation happened to be on the PC. Different vendors, different OSs, 
different versions worked differently.

One other trick is to set the default gateway to the station's own address. 
For some strange reason, on some OSs this causes the station to ARP for 
non-local addresses.

Priscilla




>This inquiry should not be mistaken with "is proxy ARP a good idea or bad
>idea" question. I just want to find some behavior facts out. Thanks.
>
>Given the following situation:
>
>  ClientA   ClientB
>   |  |
>||
>  |
>  |
>  X
>  {ROUTER}
>  Y
>   |
>   |
>|-|
> |
>  ClientC
>
>Settings:
>
>ClientA: 192.168.12.5 /24
>ClientB: 192.168.12.6 /24
>ClientC: 192.168.20.101 /24
>
>Interface X on Router: 192.168.12.1 /24
>Interface Y on Router: 192.168.20.1 /24
>Proxy ARP enabled on both router interfaces
>
>None of the clients have been configured with a default gateway setting.
>
>The operating systems are Windows 98. (Though if you prefer you can say it
>is NT 4.0)
>
>The basic statement that I have a question about:
>
>According to Jeff Doyle's Routing TCP/IP vol. 1, book on page 69-70 in
>quotes below -
>
>"... For example, a host 192.168.12.5/24 needs to send a packet to
>192.168.20.101/24, but is not configured with default gateway information
>and therefore does no know how to reach a router. It may issue an ARP
>request for 192.168.20.101; the local router, receiving the request and
>knowing how to reach network 192.168.20.0, will issue an ARP reply with it's
>own data link identifier in the hardware address field. In effect, the
>router has tricked the local host into thinking that the router's interface
>is the interface of 192.168.20.101. All packets destined for that address
>will be send to the router. ..."
>
>The question itself:
>
>The question I have with this is that under a Windows environment at least
>in my experience, The decision making process is as follows when trying to d
>o an address resolution (ARP Request).
>
>Sender looks at it's own IP address and Subnet Mask compares it to the
>target machines IP address to determine if on the same subnetwork. If it is
>so . an ARP request is issued. But if the Sender's IP address and the Target
>'s IP address are not part of the same subnetwork . the sending machine
>looks for it's default gateway and does an ARP request for it.
>
>Thus the problem is . if there is no default gateway setup for the sender .
>It won't even attempt to do an ARP request . it will IMMEDIATELY say .
>Destination host unreachable.
>
>Demonstration 1:
>
>ClientA: 192.168.12.5 /24 PINGSClientC: 192.168.20.101 /24
>
>Notice in the PING results below, where Client A pinging Client C, with the
>start and end time there is only a 6/100ths of a second difference from the
>start of the ping statement to it informing us no can do. Also note with a
>sniffer on the line there are no packets generated either from the pinging
>machine.
>
>Current time is  4:25:34.81p  <-- Start Time
>
>Pinging 192.168.20.101 with 32 bytes of data:
>
>Destination host unreachable.
>Destination host unreachable.
>Destination host unreachable.
>Destination host unreachable.
>
>Ping statistics for 192.168.20.101:
> Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
>Approximate round trip times in milli-seconds:
> Minimum = 0ms, Maximum =  0ms, Average =  0ms
>Current time is  4:25:34.87p <-- End Time
>
>--
>
>Demonstration 2:
>
>ClientA: 192.168.12.5 /24 PINGS192.168.12.88 (non-existent client)
>
>On the other hand if Client A attempts to ping a machine that it believes
>has an IP address on the same subnet the following results would occur.
>(Given the IP address being pinged is actually in the range of valid address
>for that subnet ... but is not in use at the current moment).
>
>You would get the message "Request timed out". By the way notice the start
>and end time below. I can show a sniffer capture also .. but won't . there
>are actual packets that left the pinging mac

Re: IP Multicast Addressing

[NeoLink2000]

The 239.255.255.255 is the highest in that subnet. D class starts at 224 
(1110) and then E class would start at 240 (). This makes the D class 
range of addresses: 224.0.0.0 through 239.255.255.255. Therefor if D class 
addresses are used for multicasting then the 239.255.255.255 address would be 
the last address in that range before falling into an E class address. Here 
are the ranges:

A = 1.0.0.0 - 127.255.255.255
B = 128.0.0.0 - 191.255.255.255
C = 192.0.0.0 - 123.255.255.255
D = 224.0.0.0 - 239.255.255.255   << Here is the multicast range (I believe)
E = 240.0.0.0 - 247.255.255.255

Hope I helped (and was right)   =o)

Mark Z...

In a message dated 2/10/01 4:56:54 PM Eastern Standard Time, 
[EMAIL PROTECTED] writes:


> Class D's have 1110 (which add up to 224) being the high order bits.  You
> may be onto something...  but how would you explaining the 239.255.255.255
> subnet mask.  This is where I drop into the "hu" faze.
> 
> Thanks Tim
> Phil
> 
> - Original Message -
> From: "Tim" <[EMAIL PROTECTED]>
> To: "Circusnuts" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
> Sent: Saturday, February 10, 2001 6:20 PM
> Subject: RE: IP Multicast Addressing
> 
> 
> > I'm just a little CCNA, I don't know what IP multicasting is,
> > but I believe class E networks have 4 higher order bits set to 1,
> > ie 240 - which explains why Class D's end at 239.255.255.255
> >
> > (I think!)
> >
> > -Original Message-
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> > Circusnuts
> > Sent: 10 February 2001 16:43
> > To: [EMAIL PROTECTED]
> > Subject: IP Multicast Addressing
> >
> >
> > I'm reading through McGraw Hill's BUMS book.  Chapter 7 deals with IP =
> > Multicast Addressing.  I understand that class D addresses are used =
> > (high order bits set to 1110), but a statement used in the book confuses =
> > me:
> >
> > IP Multicast addresses start with 224.0.0.0 and end with 239.255.255.255
> >
> > I'm not real keen on where the 239 came from...
> >
> > Thanks All !!!
> > Phil=20
> 



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Re: A inquiry about ARP behavior, vendors, and differences

[Raj Singh]

Thanks for confirming my suspicions, though one question on the  part about
setting the default gateway on a host to point to it's own ip address ...
would it behave the same way if the default gateway was set to a loopback
address of 127.x.x.x also. Or did that change the behavior ?

Thanks again.

- raj

"Priscilla Oppenheimer" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> At 05:35 PM 2/10/01, Raj Singh wrote:
> >NOTE: Long email / question ... regarding ARP and Proxy ARP behavior with
> >different vendors OS.
> >
> >A inquiry about ARP behavior, vendors, and differences.
> >
> >Does the way a host machine behave during the ARP process differ amongst
> >different OS manufacturers, in relationship to when Proxy ARP can be
> >implement and when it can't be.
>
> Yes. You would have to do some testing to determine which ones ARP for
> non-local stations and which don't. (It sounds like you already did some
> testing.) When I used to teach the CIT class, one of the "bugs" we
inserted
> was to remove the default gateway in the PC. The goal was to make it
> impossible for the PC to reach non-local stations. We also had to insert
> "no proxy arp" in the router config, because sometimes removing the
default
> gateway didn't cause a problem. We were at the mercy of whatever TCP/IP
> implementation happened to be on the PC. Different vendors, different OSs,
> different versions worked differently.
>
> One other trick is to set the default gateway to the station's own
address.
> For some strange reason, on some OSs this causes the station to ARP for
> non-local addresses.
>
> Priscilla
>
>
>
>
> >This inquiry should not be mistaken with "is proxy ARP a good idea or bad
> >idea" question. I just want to find some behavior facts out. Thanks.
> >
> >Given the following situation:
> >
> >  ClientA   ClientB
> >   |  |
> >||
> >  |
> >  |
> >  X
> >  {ROUTER}
> >  Y
> >   |
> >   |
> >|-|
> > |
> >  ClientC
> >
> >Settings:
> >
> >ClientA: 192.168.12.5 /24
> >ClientB: 192.168.12.6 /24
> >ClientC: 192.168.20.101 /24
> >
> >Interface X on Router: 192.168.12.1 /24
> >Interface Y on Router: 192.168.20.1 /24
> >Proxy ARP enabled on both router interfaces
> >
> >None of the clients have been configured with a default gateway setting.
> >
> >The operating systems are Windows 98. (Though if you prefer you can say
it
> >is NT 4.0)
> >
> >The basic statement that I have a question about:
> >
> >According to Jeff Doyle's Routing TCP/IP vol. 1, book on page 69-70 in
> >quotes below -
> >
> >"... For example, a host 192.168.12.5/24 needs to send a packet to
> >192.168.20.101/24, but is not configured with default gateway information
> >and therefore does no know how to reach a router. It may issue an ARP
> >request for 192.168.20.101; the local router, receiving the request and
> >knowing how to reach network 192.168.20.0, will issue an ARP reply with
it's
> >own data link identifier in the hardware address field. In effect, the
> >router has tricked the local host into thinking that the router's
interface
> >is the interface of 192.168.20.101. All packets destined for that address
> >will be send to the router. ..."
> >
> >The question itself:
> >
> >The question I have with this is that under a Windows environment at
least
> >in my experience, The decision making process is as follows when trying
to d
> >o an address resolution (ARP Request).
> >
> >Sender looks at it's own IP address and Subnet Mask compares it to the
> >target machines IP address to determine if on the same subnetwork. If it
is
> >so . an ARP request is issued. But if the Sender's IP address and the
Target
> >'s IP address are not part of the same subnetwork . the sending machine
> >looks for it's default gateway and does an ARP request for it.
> >
> >Thus the problem is . if there is no default gateway setup for the sender
.
> >It won't even attempt to do an ARP request . it will IMMEDIATELY say .
> >Destination host unreachable.
> >
> >Demonstration 1:
> >
> >ClientA: 192.168.12.5 /24 PINGSClientC: 192.168.20.101 /24
> >
> >Notice in the PING results below, where Client A pinging Client C, with
the
> >start and end time there is only a 6/100ths of a second difference from
the
> >start of the ping statement to it informing us no can do. Also note with
a
> >sniffer on the line there are no packets generated either from the
pinging
> >machine.
> >
> >Current time is  4:25:34.81p  <-- Start Time
> >
> >Pinging 192.168.20.101 with 32 bytes of data:
> >
> >Destination host unreachable.
> >Destination host unreachable.
> >Destination host unreachable.
> >Destination host unreachable.
> >
> >Ping statistics for 192.168.20.101:
> > Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
> >Approximate round trip times in milli-seconds:
> > Minimum = 0ms, Maximum =  0ms, Average =  0ms
> >Current time is

Re: Signs of LANE Incompatability (Nortel & Cisco) ???

[Lauren Child]

Circusnuts wrote:
> 
> I have "ZERO" experience in this arena...  here goes.  I believe I'm
> seeing the result of compatibility issues between Nortel equipment
> (Centillion LANE switches) & Cisco gear (7513).

Centillions have a known (or had anyway) incompatibility in the UNI
address registration.  This was known to affect fore systems cards
trying to connect to centillions, but I dont see why it wouldnt affect
cisco's.  Search deja for "Fore" in the bay and nortel comp.dcom.sys
groups for info.

TTFN
lauren

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Re: IP Multicast Addressing (corrected typo)

[anthony kim]

On Sat, Feb 10, 2001 at 03:38:35PM -0200, Circusnuts wrote:
>I've not read the McGraw Hill's BUMS book yet :-)
>
>
>I'm reading through McGraw Hill's BCMSN book.  Chapter 7 deals with IP =
>Multicast Addressing.  I understand that class D addresses are used =
>(high order bits set to 1110), but a statement used in the book confuses =
>me:
>
>IP Multicast addresses start with 224.0.0.0 and end with 239.255.255.255
>
>I'm not real keen on where the 239 came from...
>
>Thanks All !!!
>Phil=20
>

Hi Phil

239 = 1110



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Re: Appletalk over frame-relay

[d_glosser]

I would stay away from routing appletalk across a Wide Area Network.
Although only 10% of our nodes are Macs, almost 50% of our LAN and WAN
traffic was appletalk. We've just switched to desktop printing and use
AppleshareIP instead of Appletalk for file sharing (our server is a
W2K server). Users have reported file sharing and printing are 2-3x
faster. 


On 18 Nov 2000 00:35:09 -0500, [EMAIL PROTECTED] ("Adrian Chew")
wrote:

>Glad to help...  see below for config examples...
>
><[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>>
>>   I am trying to configure 5 Cisco router's with appletalk, can someone
>out
>> their send me a complete config list?
>
>
>Sure...
>
>
>hostname R1 <- change for your hostname
>!
>bridge irb <- for Appletalk to work on Frame
>appletalk routing <- to route Appletalk
>!
>enable secret apassword <- change to your own password
>!
>interface s0
> encapsulation frame-relay <- for Frame-Relay
> ip add x.x.x.x m.m.m.m <- insert your IP address
> frame-relay interface dlci 123 <- insert your DLCIs
> frame-relay interface dlci 234 <- if more than one, each must be seperate
> bridge-group 1 <- enables Appletalk
>!
>interface e0
> ip add x.x.x.x m.m.m.m <- insert your IP address
> bridge-group 1 <- enables Appletalk
>!
>bridge 1 route ip <- for IP to work
>no bridge 1 bridge ip <- so IP and Appletalk don't conflict
>bridge 1 bridge appletalk <- ties Appletalk config together
>bridge 1 protocol ieee <- bridge protocol for Appletalk (sounds just like
>iMac too!)
>!
>line con 0
> no exec <- safety measure/better security, must supply enable password for
>access
>!
>line aux 0
> no exec <- safety measure/better security, must supply enable password for
>access
>!
>line vty 0 4
> no login <- safety measure/better security so no one can login from
>Internet!
> privilege level 15 <- specifies dumb mode, level 1 gives you
>everything/enable access
>
>
>You can cut and past the whole configs and modify for each router (just
>remember to remove the comments and put in your own IP addresses and DLCIs).
>If you don't know what DLCI to use, ask your provider.
>;-)
>
>Regards,
>Adrian
>
>
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RE: passed the CCNP routing!

[Fred Danson]

Actually there were a whole lot of questions on EIGRP and OSPF in that test. 
Also, make sure you have a strong mathematical perspective on 
subnetting/supernetting. Im always trying to teach people how subnetting and 
supernetting really work, not just how to do it with some formula that they 
learned in a book somewhere.

Fred


>From: Moahzam Durrani <[EMAIL PROTECTED]>
>To: Fred Danson <[EMAIL PROTECTED]>
>Subject: RE: passed the CCNP routing!
>Date: Thu, 8 Feb 2001 15:24:15 -0800
>
>what was the main focus on the questions?? alot of ospf , bgp ?
>
>Mo Durrani
>IS&T
>WYSE\EDS
>phone:408-473 1246
>[EMAIL PROTECTED]
>[EMAIL PROTECTED]
>
>
>-Original Message-
>From: Fred Danson [mailto:[EMAIL PROTECTED]]
>Sent: Thursday, February 08, 2001 2:40 PM
>To: [EMAIL PROTECTED]
>Subject: RE: passed the CCNP routing!
>
>
>Thank you Ole,
>
>I've been taking a CCNP class at ASM Educational Center in College Park, MD
>under a CCIE instructor. The book that they gave us for the Routing segment
>wasn't too good (the Syngress one, it has tons of errors in it), but the
>instructor is awesome. And in response to the IS-IS question-- there 
>weren't
>
>any question about that on the exam.
>
>
>
>
> >From: Ole Drews Jensen <[EMAIL PROTECTED]>
> >To: 'Fred Danson' <[EMAIL PROTECTED]>
> >Subject: RE: passed the CCNP routing!
> >Date: Thu, 8 Feb 2001 15:10:23 -0600
> >
> >Congratulations,
> >
> >Any recommended reading : books, chapters?
> >
> >Did you have any ISIS related questions?
> >
> >Thanks,
> >
> >Ole
> >
> >
> >  Ole Drews Jensen
> >  Systems Network Manager
> >  CCNA, MCSE, MCP+I
> >  RWR Enterprises, Inc.
> >  [EMAIL PROTECTED]
> >  http://www.CiscoKing.com
> >
> >  NEED A JOB ???
> >  http://www.oledrews.com/job
> >
> >
> >
> >
> >-Original Message-
> >From: Fred Danson [mailto:[EMAIL PROTECTED]]
> >Sent: Thursday, February 08, 2001 2:41 PM
> >To: [EMAIL PROTECTED]
> >Subject: passed the CCNP routing!
> >
> >
> >I just passed the CCNP routing exam with a score of 908! Thank you 
>everyone
> >for the help. :)
> >_
> >Get your FREE download of MSN Explorer at http://explorer.msn.com
> >
> >_
> >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: passed the CCNP routing!

[Fred Danson]

Dear Hui,

 I read the Syngress book for the 640-503 exam. I would strongly 
recommend that you learn from a different book, because the Syngress is FULL 
of errors. If you dont have a very good instructor (like I did) to go with 
that book, then you will walk away feeling very confused.
 I also bought the examcram book which I thought was somewhat helpful. I 
didn't actually read the examcram book, all I did was take the tests in the 
end of all the chapters, and in the end of the book. I think 3-4 of the 
questions on the test were EXACT matches to 3-4 of the ones in the examcram 
book.
 Good luck with your studying, and dont be afraid to take the test. It 
really isn't ALL that hard. Just make sure you have a strong understand of 
the concepts.

Sincerely,
Fred


>From: Hui Ellis <[EMAIL PROTECTED]>
>To: Fred Danson <[EMAIL PROTECTED]>
>Subject: Re: passed the CCNP routing!
>Date: Thu, 8 Feb 2001 16:52:21 -0800 (PST)
>
>Hi Fred,
>Congretulation!
>
>Tell me a little more what book did you read and what
>prep test did you buy or practice.
>Thanks a lot
>
>Hui
>--- Fred Danson <[EMAIL PROTECTED]> wrote:
> > I just passed the CCNP routing exam with a score of
> > 908! Thank you everyone
> > for the help. :)
> >
>_
> > Get your FREE download of MSN Explorer at
> > http://explorer.msn.com
> >
> > _
> > 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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Hi

[Our Mail]

Hi Group,

I got job offer from Interbasecorp (www.interbasecorp.com), Tustin, =
Texas. Does any one dealt with this company ?

Please provide your inputs.

Thanks in advance.

Best regards

Naveen

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PPP Multilink or Cisco BoD

[Adam Burgess]

To all DDR gurus:

Are there any benefits in using the Cisco Proprietary =
Bandwidth-on-Demand feature (ie. dialer load-threshold), rather than =
using ppp multilink (other than the fact the ppp multilink is standard)?

Regards

Adam Burgess
Brisbane, Australia

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RE: can the module of 7010 be used in 7500 or 7200?

[Daniel Cotts]

The 7010 uses the CX series of cards. Many can be used in a 7500. Check the
Rev(ision) number. The older ones often won't work. There is a list stating
which cards do work. I use an old paper Cisco catalog for my list.
If you have the card in a router and do a "show diagbus" the ouput will show
if it is 7500 compatible.
The 7200 series use the smaller port adapter (PA) subinterfaces. In a 7500
they would be daughter cards to a VIP2 card. The CX series won't work in a
7200. 

> -Original Message-
> From: cslx [mailto:[EMAIL PROTECTED]]
> Sent: Saturday, February 10, 2001 6:34 AM
> To: [EMAIL PROTECTED]
> Subject: can the module of 7010 be used in 7500 or 7200?
> 
> 
> thanx
> 
> 
> _
> FAQ, list archives, and subscription info: 
> http://www.groupstudy.com/list/cisco.html
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Serial number via telnet

[Anthony J Crews]

Is there a way to obtain a routers serial number via a telnet session?

Thanks,

Anthony

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Re: Serial number via telnet

[Circusnuts]

I was going to say "Sho CDP Neighbor Detail," but now that I think about
it... I don't believe Cisco routers have serial #'s burned into their
hardware.  These #'s are stamped or taped to the chassis only.  There has
been many-a-time I've opened TAC warranty cases, only to find the sticky
part of the serial # sticker left on the router...

.02
Phil

- Original Message -
From: "Anthony J Crews" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, February 11, 2001 1:54 AM
Subject: Serial number via telnet


> Is there a way to obtain a routers serial number via a telnet session?
>
> Thanks,
>
> Anthony
>
> _
> 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: Networkers toolkit question

[Daniel Cotts]

I just checked out that Ultimate kit and found that I don't use much of it.
We don't all perform the same tasks - so each will choose different tools. I
tend to like fewer tools but each must be top quality. Another issue is how
to carry them. Will you have to travel (as in check it on a plane)? Do you
really want to put everything that you might ever want in one box? Usually
large and heavy - not a good idea.
Tone trace tool Progressive 700C - comes with a pouch. Has a composite tip
so you don't short pairs when running a 66 block. Heck - just turn up the
volume - hold it in one hand - and run the block with your index finger from
the other hand. Much faster.
To break out an RJ-45 plug or jack buy two Siemon MODAPT adapters. Makes it
easy to ring out a cable for opens and shorts. Use the continuity tester
from the Progressive tool above.
Buy two or three short jumpers with alligator clips on each end. Most likely
from Radio Shack. Allows you to put a short across two wires using the
MODAPT.
RJ-45 plug crimp tool. AMP 2-231652-0 Expensive. Does the job every time.
AMP 5-569278-3 Box of 100 RJ-45 plugs. Uses the cheater insert to line up
the wires.
Punch down tool. Harris. I have a D-914
Blades for the tool.  101 block style for RJ-45 jacks. 66 block style for
Telco punch downs. (almost never used)
Harris makes a plastic case to hold spare blades. Useful.
Splicers scissors.  Mine are Klein 2100-7 Cable guys rarely use any other
tool.
Small diagonal cutting pliers. Mine are Klein D528V
Medium long nose pliers with wire stripping nose. Klein D2291
Mini Mag Lite - small flashlight.
Assorted screwdrivers. #1 and #2 phillips. 1/4" flat. Small pocket size too.
Cables and adapters as you need them. Data Comm Warehouse.
Electrical outlet tester. One style plugs into an outlet. Three lights give
status.
Case. I use an old attache style fiber case. It just fits my needs better
than anything else that I have seen. I don't travel much. When I do, I hand
carry it. From Specialized in Texas. Not even in the catalog. Ellis CA8190. 
Sources. Specialized great catalog prices high.
Anixter decent prices.
Graybar decent prices.
There are other companies that cater to the telco market.
If you need a tool once, improvise if you don't have it. If you need it a
second time, start shopping. By the third time buy it.
Hope that you receive many replies.

> -Original Message-
> From: Natasha [mailto:[EMAIL PROTECTED]]
> Sent: Saturday, February 10, 2001 11:14 AM
> To: CCIE Group study list
> Subject: Networkers toolkit question
> 
> 
> Hi gang,
> It's time for me to get my own toolkit for network testing and such.
> Been using odds and ends long enough and it just doesn't look that
> professional.
> I've been to the http://www.jensentools.com/ site and looked 
> at some of
> the network testers 2 grand and up! Way out of my range here.
> Then I found this kit http://www.milestek.com/theultimateLANkitII.htm
> Under 700.00 that's a little more like it!
> Would this kit do the job for LAN testing?
> What I'm looking for is something that would be a good all around
> package and the best bang for my buck.
> 
> What do you folks use?
> Thanks 
> 
> -- 
> Natasha Flazynski
> http://www.ciscobot.com
> My Cisco information site.
> http://www.botbuilders.com 
> Artificial Intelligence and Linux development 
> 
> A bus station is where a bus stops.
> A train station is where a train stops.
> On my desk, I have a work station...
> 
> _
> 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: passed the CCNP routing!

[Fred Danson]

I dont really know of any good books about supernetting/subnetting, but if 
you were to look, make sure it fully explains it. Find a book that explains 
it from a mathematical point of view, because that is the essence of 
supernetting/subnetting. It is pure binary math :)

A lot of people who got by on the CCNA by memorizing a number different 
formulas would have a lot of trouble on the CCNP. They really test you on 
the CCNP routing exam. Someone posted a really good 3com route summarization 
site on groupstudy about a week ago, but I forgot what the link was




>From: John Chang <[EMAIL PROTECTED]>
>To: "Fred Danson" <[EMAIL PROTECTED]>
>Subject: RE: passed the CCNP routing!
>Date: Sat, 10 Feb 2001 22:58:19 -0500
>
>Know a good reference on subnetting/supernetting?  Or can you tell me so
>that I can see if I know it.  Thanks.
>
>At 10:00 PM 2/10/2001 -0500, you wrote:
>>Actually there were a whole lot of questions on EIGRP and OSPF in that 
>>test.
>>Also, make sure you have a strong mathematical perspective on
>>subnetting/supernetting. Im always trying to teach people how subnetting 
>>and
>>supernetting really work, not just how to do it with some formula that 
>>they
>>learned in a book somewhere.
>>
>>Fred
>>
>>
>> >From: Moahzam Durrani <[EMAIL PROTECTED]>
>> >To: Fred Danson <[EMAIL PROTECTED]>
>> >Subject: RE: passed the CCNP routing!
>> >Date: Thu, 8 Feb 2001 15:24:15 -0800
>> >
>> >what was the main focus on the questions?? alot of ospf , bgp ?
>> >
>> >Mo Durrani
>> >IS&T
>> >WYSE\EDS
>> >phone:408-473 1246
>> >[EMAIL PROTECTED]
>> >[EMAIL PROTECTED]
>> >
>> >
>> >-Original Message-
>> >From: Fred Danson [mailto:[EMAIL PROTECTED]]
>> >Sent: Thursday, February 08, 2001 2:40 PM
>> >To: [EMAIL PROTECTED]
>> >Subject: RE: passed the CCNP routing!
>> >
>> >
>> >Thank you Ole,
>> >
>> >I've been taking a CCNP class at ASM Educational Center in College Park, 
>>MD
>> >under a CCIE instructor. The book that they gave us for the Routing 
>>segment
>> >wasn't too good (the Syngress one, it has tons of errors in it), but the
>> >instructor is awesome. And in response to the IS-IS question-- there
>> >weren't
>> >
>> >any question about that on the exam.
>> >
>> >
>> >
>> >
>> > >From: Ole Drews Jensen <[EMAIL PROTECTED]>
>> > >To: 'Fred Danson' <[EMAIL PROTECTED]>
>> > >Subject: RE: passed the CCNP routing!
>> > >Date: Thu, 8 Feb 2001 15:10:23 -0600
>> > >
>> > >Congratulations,
>> > >
>> > >Any recommended reading : books, chapters?
>> > >
>> > >Did you have any ISIS related questions?
>> > >
>> > >Thanks,
>> > >
>> > >Ole
>> > >
>> > >
>> > >  Ole Drews Jensen
>> > >  Systems Network Manager
>> > >  CCNA, MCSE, MCP+I
>> > >  RWR Enterprises, Inc.
>> > >  [EMAIL PROTECTED]
>> > >  http://www.CiscoKing.com
>> > >
>> > >  NEED A JOB ???
>> > >  http://www.oledrews.com/job
>> > >
>> > >
>> > >
>> > >
>> > >-Original Message-
>> > >From: Fred Danson [mailto:[EMAIL PROTECTED]]
>> > >Sent: Thursday, February 08, 2001 2:41 PM
>> > >To: [EMAIL PROTECTED]
>> > >Subject: passed the CCNP routing!
>> > >
>> > >
>> > >I just passed the CCNP routing exam with a score of 908! Thank you
>> >everyone
>> > >for the help. :)
>> > >_
>> > >Get your FREE download of MSN Explorer at http://explorer.msn.com
>> > >
>> > >_
>> > >FAQ, list archives, and subscription info:
>> > >http://www.groupstudy.com/list/cisco.html
>> > >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>> >
>> >_
>> >Get your FREE download of MSN Explorer at http://explorer.msn.com
>> >
>> >_
>> >FAQ, list archives, and subscription info:
>> >http://www.groupstudy.com/list/cisco.html
>> >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>>
>>_
>>Get your FREE download of MSN Explorer at http://explorer.msn.com
>>
>>_
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>>http://www.groupstudy.com/list/cisco.html
>>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>

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Router For Sale

[Circusnuts]

For sale- 1 Cisco 3104 router (2 Serial/ 1 Ethernet/ 1 BRI).  I'm about =
to make an Ebay page for it, so please save me the trouble :-)  This =
router is in great condition, with a "FEW" very light scratches on the =
case & the internals look new (I clean all my lab equipment =
religiously...  inside & out).  This box is upgraded to the exact specs =
of a 2523 or 2503: 16 Megs RAM/ 8 Megs FLASH/ 11.0 boot ROM's/ 12.0(9) =
Enterprise IOS. =20

I am firm @ $450 + the "actual shipping fee" & am willing to ship =
international.

Please let me know if you are interested

Thanks=20
Phil


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RE: Networking White Papers (NAP and BGP)

[Peter Van Oene]

That certainly helps.  To me, the term NAP is in some ways antiquated.  I expected 
that you were thinking L3 IXP based on your description but wanted to make sure.  The 
concept of building a large scale NAP similar to those that you mention seems rather 
grand to me :)  

I can send you off list a couple documents on building IXP's at both layer 2 and layer 
3.  As well, the documents that Howard referenced are likely excellent sources of 
information as well.  But I do concur, and all bias aside, if you are looking to build 
something on a large scale you are likely wise to tap into some focused consulting 
resources, most of which I expect lie at Cisco and Juniper.  

If you would like the pdf's I have, please let me know.  I can't link to them as I do 
not recall from whence I thieved them.

Pete

*** REPLY SEPARATOR  ***

On 2/10/2001 at 2:56 PM Hinton Bandele-NBH281 wrote:

>As defined in the industry, a Network Access Point (NAP) is a major connection point 
>in the global Internet.  It is like a Point-of-Presence (POP) but it is high 
>bandwidth.  Currently there are 5 major NAP in the US, but I need white papers on the 
>construction of these major POPs.  Hope that helps!
>
>-Original Message-
>From: Peter Van Oene [mailto:[EMAIL PROTECTED]]
>Sent: Saturday, February 10, 2001 1:01 PM
>To: Hinton Bandele-NBH281
>Subject: Re: Networking White Papers (NAP and BGP)
>
>
>What exactly do you consider a NAP to be?  
>
>*** REPLY SEPARATOR  ***
>
>On 2/9/2001 at 9:14 AM Hinton Bandele-NBH281 wrote:
>
>>I am setting up a NAP using 3600's and need a site or location for obtaining 
>whitepapers on both NAP's and BGP.  I am going to use BGP for router redundancy 
>across multiple ISPs.  Where can I find these whitepapers on these two subjects?
>>
>>Thanks!
>>
>>Bandele Hinton
>>Motorola Corporation
>>630-353-8286 (office)
>>877-992-7925 (pager)
>>[EMAIL PROTECTED]
>>
>>
>>_
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>>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]



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RE: Serial number via telnet

[Andrew Cook]

Here's some ideas for serial #:

1. If you have the right CCO access, you can go into online ordering and
pull up a particular PO and view the serial #s online.  You might be able to
get your vendor to do this for you if you don't have a direct purchase
account.
2. The serial # is always on the box the router came in if you happen to
have that somewhere.
3. The serial # may be on paperwork (POs, packing lists, etc) in your
accounting department.
4. I always use 'snmp-server chassis-id SERIAL#' when configuring so I can
then get the # via telnet or snmp.
5. CiscoWorks gets the serial #s for connected hardware, but not the chassis
itself.
6. Catalysts seem to go against this - I do believe you get the actual
chassis serial # for a Catalyst (at least the set-based) via cdp, telnet,
and CW.

Hope this helps!

Andrew

> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> Anthony J Crews
> Sent: Saturday, February 10, 2001 10:54 PM
> To: [EMAIL PROTECTED]
> Subject: Serial number via telnet
>
>
> Is there a way to obtain a routers serial number via a telnet session?
>
> Thanks,
>
> Anthony
>
> _
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
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Re: PPP Multilink or Cisco BoD

[Santosh Koshy]

The dialer load-threshold feature, works in combination with ppp
multilink...
What "dialer load-threshold" does is, define the load level that must be
exceeded on the first ISDN B channel before the router attempts to bring up
a second B channel for a multilink PPP connection.

""Adam Burgess"" <[EMAIL PROTECTED]> wrote in message
011001c093dd$116e7140$[EMAIL PROTECTED]">news:011001c093dd$116e7140$[EMAIL PROTECTED]...
> To all DDR gurus:
>
> Are there any benefits in using the Cisco Proprietary =
> Bandwidth-on-Demand feature (ie. dialer load-threshold), rather than =
> using ppp multilink (other than the fact the ppp multilink is standard)?
>
> Regards
>
> Adam Burgess
> Brisbane, Australia
>
> _
> 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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Request of swapping CCIE Lab Exam Date

[Yuenme]

Hi,

I want to swap my lab exam date with those who will have it in the weekend
of mid June to early July in NC. Mine is in May 19-20 at NC. Pls reply only
if you have registered. Thanks.

[EMAIL PROTECTED]


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Router Rental

[Jason Yasment]

Hello,

With all the discussions of purchasing router for CCNP labs, has anyone
rented router time from any of the various providers on the web?  Looking
for an alternative to spending several thousand dollars.

Thank You,

Jason M Yasment
http://www.geocities.con/jasonmyasment/
http://www.geocities.com/jyasment/vanagon.htm

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Re: Networkers toolkit question, Thank you!

[Natasha]

Thank you all that helped me with this issue.
This is what I've decided on and why.
First of all just like anything else I've found that a professional
presentation is at least 1/2 of the service call. I hate to say this but
I bought the network kit that looked the best. Even though about 1/3 of
it is just fluff. I'm not trying to be insensitive but my last emergency
call was somebody not spelling their POP3 correctly and a cat5 cable
being cooked by a heater. 
Welcome to the world of networking!! lol Ya gotta love this job

This is what I ordered.
http://www.jensentools.com/family.asp?lang=eng&parent_id=5665&parent_name=JTK%26%23174%3B%2D2100%3CBR%3ENetwork+Managers%27+Kit&dept_id=270
without the test equipment
and
http://www.milestek.com/uninetworktester.htm
Uni-Network Tester #2 
I've actually saved over $100.00 buying it this way.

Natasha Flazynski
http://www.ciscobot.com
My Cisco information site.
http://www.botbuilders.com 
Artificial Intelligence and Linux development 

A bus station is where a bus stops.
A train station is where a train stops.
On my desk, I have a work station...

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Re: Router Rental

[Larry Lamb]

I've used MentorLabs and have been happy with the product.  They seem to
match the labs in the CCNP books from Cisco Press which is always a plus.

"Jason Yasment" wrote in message <001701c093ee$b71e2700$4a01a8c0@laptop>...
>Hello,
>
>With all the discussions of purchasing router for CCNP labs, has anyone
>rented router time from any of the various providers on the web?  Looking
>for an alternative to spending several thousand dollars.
>
>Thank You,
>
>Jason M Yasment
>http://www.geocities.con/jasonmyasment/
>http://www.geocities.com/jyasment/vanagon.htm
>
>_
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>


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How to pronounce "TACACS"?

[Zhiping Li]

As title.
thanks a lot.

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Re: PPP Multilink or Cisco BoD

[Adam Burgess]

Correct - although you don't need to specify 'dialer load-threshold' in
order to bring up multiple channels, as if it is specified without ppp
multilink, it enables bandwidth on demand and seems to provide the same
throughput as ppp multilink.

If you specify dialer load-threshold AND ppp multilink, then the interfacses
switches to 'industry standard' ppp multilink.

I was curious if there were any benefits (ie. bandwidth utilisation, delay,
CPU time, memory, etc) to be gained by using bandwidth on demand without ppp
multilink.

Adam
- Original Message -
From: "Santosh Koshy" <[EMAIL PROTECTED]>
Newsgroups: groupstudy.cisco
To: <[EMAIL PROTECTED]>
Sent: Sunday, February 11, 2001 3:46 PM
Subject: Re: PPP Multilink or Cisco BoD


> The dialer load-threshold feature, works in combination with ppp
> multilink...
> What "dialer load-threshold" does is, define the load level that must be
> exceeded on the first ISDN B channel before the router attempts to bring
up
> a second B channel for a multilink PPP connection.
>
> ""Adam Burgess"" <[EMAIL PROTECTED]> wrote in message
> 011001c093dd$116e7140$[EMAIL PROTECTED]">news:011001c093dd$116e7140$[EMAIL PROTECTED]...
> > To all DDR gurus:
> >
> > Are there any benefits in using the Cisco Proprietary =
> > Bandwidth-on-Demand feature (ie. dialer load-threshold), rather than =
> > using ppp multilink (other than the fact the ppp multilink is standard)?
> >
> > Regards
> >
> > Adam Burgess
> > Brisbane, Australia
> >
> > _
> > 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: Traffic Shaping and Access control

[Erick B.]

Hi,

You want to look into policy routing and route-maps on
cisco.com. Plenty of docs on the subject. You will
need two route-map sequences. One to match on www and
set next hop to R3 and the other to set next hop for
all other traffic to R2.

--- A  Mateen <[EMAIL PROTECTED]> wrote:
> Hi !
> 
> I have the following scenario 
> 
>  -- R2  LAN2
> LAN1---R1
>  -- R3 - LAN3
> 
> 
> Note: R1 is the end customer 
>   R2 is ISP1 edge router
>   R3 is ISP2 edge router 
> DEFAULT IP ROUTE IS POINTING TO BOTH R2 AND R3.
> (MUST)
> 
> Any traffic comes from LAN1 with www request to go
> on R3
> and rest of the traffic shud be routed via R2 only.
> 
> How do I limit this acess.. Apprecite the update on
> this


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Re: How to pronounce "TACACS"?

[Larry Lamb]

I've always pronounced it like "tac-axe" but then again maybe I'm wrong as
well

Zhiping Li wrote in message
<[EMAIL PROTECTED]>...
>As title.
>thanks a lot.
>
>__
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>Get personalized email addresses from Yahoo! Mail - only $35
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>
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