Dear Friend
I would say Security would be better , since security plays a major
role in network these days , more over there are very less not of security
certified people around the globe, but one info security is not as easy as R
S , any thing , wish you all the best
Bani
Message
Think of it like this. Each switch is supposed to block redundant ports
leading to the root bridge. Say Switch1 and Switch2 are interlinked, and
also have downlink connections to the root bridge, like this:
Switch1 -- Switch2
| |
| |
Core1 -- Core2
There could be hosts inbetween (think hub).
Thanks,
Zsombor
Curious wrote:
Hello friends, I want to thank every answer to this post. I
knew that a port
with spanning tree in blockin state has not any relation with
being down, I
was surprised with some answers. What surprised me, is that
What are you trying to accomplish? A configuration using specific protocols
for some lab, or are you just trying to get some connectivity up and
running? Why don't you just use backup interface? Ah, it looks like you
are doing this for a lab, and not a real-life reason. O.K., is your IPsec
Try turning off the port 80 inspecting with the no fixup protocol http
80 command
-Original Message-
From: Faisal [mailto:[EMAIL PROTECTED]
Sent: Monday, September 01, 2003 1:38 AM
To: [EMAIL PROTECTED]
Subject: Slow Browsing via 500 Pix firewall [7:74583]
Hi All,
I am having problem
set the FECN bit in packet. This is use to inform RECIPENT ( Destination )
that congestion occur.
BECN : Detect congestion in path from source to destination, it set the BECN
bit in packet that travel opposite direction of the frame encounter the
congestion. This will inform the ORINATOR (
Reimer, Fred wrote:
Think of it like this. Each switch is supposed to block redundant ports
leading to the root bridge. Say Switch1 and Switch2 are interlinked, and
also have downlink connections to the root bridge, like this:
Switch1 -- Switch2
| |
| |
what happen if ISDN received the setup but not responded to connect ? IS the
problem pointing to layer 1 , 2 or 3 ?
Thanks
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From the Cisco Security Configuration Guide:
When CHAP is enabled on an interface and a remote device attempts to
connect to it, the access server sends a CHAP packet to the remote device.
The CHAP packet requests or challenges the remote device to respond. The
challenge packet consists of an ID,
Typically, you'd do the RS ccie first. You'd need to know most of the RS
stuff anyhow to do the security exam.
The only way I'd suggest going for the security exam first is if you're
already a master of the security topics (PIX, IDS, VPN, etc). If you feel
confident that you can totally master
Dear Reader
Does unmanaged switches have MAC Address , because we have some
unmanaged switches which uses the concept of Store and Forward for handling
the frames
if it is there , what is the simple way to find the MAC address of the
switch
Thanks in advance
Bani
Message Posted at:
i think he has...
forw. \ /blked
/---\
switch1 switch2
\/
blked/ \forw.
not that it makes any sense to me either. it would seem logical that one
entire link would be blocked and one forwarding.
-Original Message-
From:
Dear Reader
Does unmanaged switches have MAC Address , because we have some
unmanaged switches which uses the concept of Store and Forward for handling
the frames
if it is there , what is the simple way to find the MAC address of the
switch
Thanks in advance
Bani
Message Posted at:
As Zsombor pointed out, the link in between the switches is a segment.
It could contain hosts. Remember that Spanning Tree was created way before
there was anything like a switch (which is just a fast multi-port bridge).
Think of ThickNet Ethernet with DEC DELNIs and vampire clamps. If both
Brave!! This is exactly the kind of answer I was waiting for. Just
common sense, now I understand it, and I feel like a stupid because
the answer is obvious.
Thanks Zsombor
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Please someone could comment what differences and new topics are included in
the new 642-811 exam versus the old version (640-604).
What new topics are not included in the Cisco Press book ?
Where could I find good info about these new topics ?
Regards.
Message Posted at:
Is is a truly unmanaged switch that can not be addressed whatsoever, or is a
switch that can be assigned an IP address and managed, but just hasn't been
done yet??? I believe that 99.44% of Cisco switches are all manageable
(have a MAC associated with them). Persausions and dissausions for this
Hi, I have had similar problems in the past when one person was downloading
several Linux ISO's from there PC all at once !!! They had come in early to
do so. After doing a clear xlate the problem was resolved and everyone could
browse at the normal speed. The person started their ISO donwloads
I would hope so, especially if they support Spanning Tree. It would be kind
of hard to run the Spanning Tree protocol without a MAC address...
Fred Reimer - CCNA
Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338
Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050
Hi there,
If I wanted to be a CCIE, I would go for Security track or maybe the voice
track, but I think the latter is too specialized. Security is something you
need to know anyway, if you want to be a good and respected network
professional. Companies will understand that you know the most
Of course, if you're in the UK, you are (I think) probably using ETSI ISDN,
so the physical config would actually be something like...
controller E1 0
clock source line primary
pri-group timeslots 1-31
interface Serial0:15
isdn switch-type primary-net5
! rest of interface config...
That's
Is the problem related to a slow initial connection to a Web Server? If so
then it could be an IDENT protocol problem (TCP port 113 connection coming
back to you from the server). Try putting service resetoutside on the PIX
and see if the problem still persists.
Mark
CCIE RS, Security
Lab
In 6.2(2) version of software you might think of turning off the ILS and SIP
fixups. These are known for reloading the PIX for no reason. There are bugs
listed on Cisco's website about it.
Mark
CCIE RS, Security
Lab Technician
GigaVelocity.com
- Original Message -
From: Deepali S
Has anyone successfully HOT-SWAP-upgraded power supplies on a 6509s.
In other words:::
Pwr-A is 1300 watts Pwr-B is 1300 watts
Pull out Pwr-A;
XXX Pwr-B is 1300 watts
replace it w/ a 2500 watt pwr supply; so you now have:::
Pwr-A is 2500 watts Pwr-B is
The last time we tried that it bounced the switch, especially if you
Running redundant power...
Larry Letterman
Cisco Systems
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
COULOMBE, TROY
Sent: Tuesday, September 02, 2003 5:57 PM
To: [EMAIL
No, what was your experience??? I expect from your question that you had
issues...
Fred Reimer - CCNA
Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338
Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050
NOTICE; This email contains confidential or proprietary
Does anybody know the passing score for the 640-604 switching exam?
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FAQ,
someone requested the configs; i'm sorry, i'm not sure who.
and the links are numbered, btw.
7500:
interface atm 0/1/0.101
ip address 192.168.10.1 255.255.255.252
!
!
router ospf 120
network 192.168.10.0 0.0.0.3 area 0
network 10.64.0.0 0.0.0.255 area 14
!
2500:
interface ethernet
Jens,
Assuming this is legacy DDR, do you have a static layer 3 to layer 2
resolution (dialer map) for the IP of the remote end? Post your config if
you're still having trouble.
HTH,
Brian McGahan, CCIE #8593
[EMAIL PROTECTED]
Internetwork Expert, Inc.
.!!!
Brian McGahan, CCIE #8593
[EMAIL PROTECTED]
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-334-8987
Direct: 708-362-1418 (Outside the US and Canada)
Message Posted at:
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Jens,
Assuming this is legacy DDR, do you have a static layer 3 to
layer 2 resolution (dialer map) for the IP of the remote end? Post your
config if you're still having trouble.
HTH,
Brian McGahan, CCIE #8593
[EMAIL PROTECTED]
Internetwork Expert, Inc.
does anyone know if using frame-mode mpls affects the mtu on an interface? i
can't help thinking that sticking in an extra 32-bit header would mean
reducing the amount of user data that could be carried by 32 bits - causing
fragmentation if the data field is already at its max for a given
Dear Friends
I heard from september end CCIE RS is going to change , does any one
aware of the changes , what and how the changes are going to be
thanks in advance
Bani
Message Posted at:
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The new exams will include features that are available in the 12.2 version
of code
Fred Reimer - CCNA
Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338
Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050
NOTICE; This email contains confidential or proprietary
Hi All,
I am having problem of slow or interminnent browsing through pix firewall. If
I bypass the traffic speeds are fine. But if all that traffic is going via
firewall then it becomes extremely slow. Please anybody can help me how to
sort this out.
Regards
Faisal
Message Posted at:
You also need this command:
sysopt connection permit-pptp
This is my working config:
vpdn group 1 accept dialin pptp
vpdn group 1 ppp authentication mschap
vpdn group 1 ppp encryption mppe auto
vpdn group 1 client configuration address local pptp
vpdn group 1 client configuration dns ProxySvr
Hello
SOunds to be a silly question,but I want to know the
basic difference between 100baseT and 100BaseTx.
Same applies to even 10baset ,10BaseTx also
Thanks in advance.
Piyush
Yahoo! India Promos: Win TVs, Bikes, DVD
Hello
SOunds to be a silly question,but I want to know the
basic difference between 100baseT and 100BaseTx.
Same applies to even 10baset ,10BaseTx also
Thanks in advance.
Piyush
Yahoo! India Promos: Win TVs, Bikes, DVD
Nice question. Things like that are normally taken for granted.
Rgds,
Ak
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Hello Forum
Please can any body explain to me what are End to end Vlan and Local VLAN in
a concept, if there is any diagram of this on Cisco web Site and why end to
end vlans are 80/20 and local VLAN are 80/20
I know that traffic flows can be distinguee in
Local Traffic
Remote Traffic
anyone can help with a configuration for dsl to a 2514? I just got the
router
and having a hell of time with it. thanks.
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Hello friends, I have an spanning tree question for you!
I have a lot of switches connected between them, but I have seen
something that I can not explain very well. Two of these switches are
connected using two cables:
Switch1 Switch2
Port 29
Yes it is live and well! if you look at the Cisco's blueprint under all
the routing protocols yes it is tested if I were you I would get me an
IS-IS book..from Amazon. COM used one...IS-IS is a very interesting
link-state protocol with respect to OSPF similarities and
differences.Believe
I know this do not answer your question but did you saw the timers of
Forwarding Delay in the Switches??
Regards
Victor.
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I expected to see one port in blocking state (spanning-tree) and the other
in forwarding state, but suprisingly I have seen that port 30 is in
blocking
state in Switch1 but it is in forwarding state in Switch 2.
I might be giving you wrong answer, but if one port is in blocking and
the
I might be giving you wrong answer, but if one port is in blocking and
the other one in blocking state, link is down in any case. The whole point
of STP is acomplished.
Should be read as:
I might be giving you wrong answer, but if one port is in blocking and
the other one in
Sorry, I have that line but forgot to post it.
The only thing I can think of, is that Win98 gets confused as to where to
send the packets. It only has one default gateway (the one on the network
adapter for the local network). I am curious how the TCP/IP Stack knows to
send items destined for
I always like to think of Spanning Tree in respect to the numbers on a
clock. If the information goes around in a circle, you only need 1
blocking port to disrupt the circle. You don't need to block in two
parts of the circle. The Sybex CCNA book had an excellent example of
this (I got my CCNA
They are the same thing. The X refers to pair, the T refers to
twisted. It is assumed you are talking about pair when you use just the T.
Hope that helps!
Michael Barnhart
Message Posted at:
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I always like to think of Spanning Tree in respect to the numbers on a
clock. If the information goes around in a circle, you only need 1
blocking port to disrupt the circle. You don't need to block in two
parts of the circle. The Sybex CCNA book had an excellent example of
this (I got my
Dear Friend
END-TO-END VLAN is where the switches are connected together remotely
under the same vlan , where the traffic is flowing through your wan link
where 80 percent of traffic is running on WAN link
the Local VLAN is within the same building are (just for EG)where the 80
percent traffic
Hello Marko, you said:
I might be giving you wrong answer, but if one port is in blocking and the
other one in blocking state, link is down in any case. The whole point of
STP is acomplished
But this is not right, my ports are up/up, but one of them is
in forwarding state and the other in
Dear Friend
Its the basics of STP
Root Bridge
-
29
30
Thanks bharani, I thought this, but neither Switch1 or Switch2 is
the root bridge:
Switch1:#sh spanning-tree
Spanning tree 1 is executing the IEEE compatible Spanning Tree protocol
Bridge Identifier has priority 32768, address 0005.5e0c.57b6
Configured hello time 2, max age 20, forward
At 10:37 PM 8/31/2003 +, Thomas Salmen wrote:
does anyone know if using frame-mode mpls affects the mtu on an interface? i
can't help thinking that sticking in an extra 32-bit header would mean
reducing the amount of user data that could be carried by 32 bits - causing
fragmentation if the
I'm scheduled to take the CCIE RS lab on 9/15. I would like to exchange
with any later lab date. Please contact me asap if you're interested in
swapping the lab date.
James Pham
Network Engineer
MAINTECH
714-283-7358 (Work)
714-401-1435 (Mobil)
Message Posted at:
The root switch will always be in forwarding. The downstream switch will
Always be in blocking mode ...thats why the link is up/up...
Larry Letterman
Cisco Systems
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Monday, September 01, 2003 8:21 AM
To:
Hi. This is the qmail-send program at casper.sri.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
:
130.107.1.30 does not like recipient.
Remote host said: 550 5.1.1 ... User unknown
Giving up on
Hai
They dont make any difference ,
Bani
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FAQ, list archives, and
The simple answer is that yes, ISIS is a possible topic for the R/S exam.
The better question to ask is why? The R/S is supposed to be an
enterprise-networking oriented exam. Those who are interested in carrier
routing where ISIS is most commonly found should be looking at the C/S.
Let's face
hmm, cheers
any idea if there is any documentation regarding this? seems to me that with
all these sites these days mucking around with df bits and filtering icmp
that it's a wonder that any link with an odd pmtu works at all. not to
mention qos getting all upset with fragmented packets.
thomas
nrf wrote in message
news:[EMAIL PROTECTED]
The simple answer is that yes, ISIS is a possible topic for the R/S exam.
The better question to ask is why? The R/S is supposed to be an
enterprise-networking oriented exam. Those who are interested in carrier
routing where ISIS is most commonly
That seems right to be. The link should not go down just because spanning
tree is blocking a port.
Curious wrote in message
news:[EMAIL PROTECTED]
Hello friends, I have an spanning tree question for you!
I have a lot of switches connected between them, but I have seen
something that I can
Cosmic radiation
Best regards,
Dom Stocqueler
SysDom Technologies
Visit our website - www.sysdom.org
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
nettable_walker
Sent: 30 August 2003 19:27
To: [EMAIL PROTECTED]
Subject: Re: Console port now working
Hiyah guys,
I have a question on PPP CHAP. From the various sources, we just need to
declare the remote router's username and have the same password, apply CHAP
on the PPP serial interfaces and the link will be up.
In my case, it doesn't work. It became a flapping link. I am using a 2500
and
But you always have to consider caveat lector
Fred Reimer - CCNA
Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338
Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050
NOTICE; This email contains confidential or proprietary information which
may be legally
The way chap works is one router has to challenge the other for
Shared secret. If you look at it this way then you see the solutions
If you do not want one router to challenge the other you can delete the
Ppp authe chap or you can use ppp authe chap callin where you can say:
I will challenge the
Hello,
I will be rolling out IPCC express and the 7750 in early Nov. at our call
center (65 agents) and HQ 27 VP exec types. These two sites will be
contacted by a PtP T1 just for voice. I am a little worried about call
quality; did you get the echo taken care of? Any other tips you can pass on
This should work.
You can be overriding the hostname and the password by using the interface
commands:
ppp chap hostname ...
ppp chap password ...
also one more thing that you can be aware:
in an outgoing call, if you do not want to send an OUTGOING CHALLENGE you
can be using the callin option
Actually, I just purchased CCIE Test #3 by Dennis. I was having
a little bit of trouble with the older version so I installed the
latest version of the software, 5.10 I think, and everything was
fixed. Not only that, but in Dennis's test, he has multimedia
tutorials as well. I only saw one of
Use the Doc CD online... it has a wealth of information:
http://www.cisco.com/univercd/home/home.htm
2950:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12114ea1/2950scg/sw8021x.htm
3550:
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12114ea1/3550scg/sw8021x.htm
Hi all,
Small problem
We got an update today from 128kb to 512kb leased line.
We got 2 3640 routers, 1 on each end off the leased line . IOS on first
3640 12.0(13) on second 3640 router 12.0(4).
Both routers have a NM-4T module.
On first router:
All is up, DCD=up DSR=up DTR=up
Does it display anything when you powercycle the router? Does it display
the bootup information and then freeze?
If it displays the bootup information and then freezes you may have
accidentally put 'no exec' under the console port. You would need to break
into the router, just like you would if
Jeroen Timmer wrote:
Don't those 2 clockrates have to be the same, 511680 looks good to me for a
512kb line? And does this problem point
to the Telco who has a problem with their clockrate ??
Yeah, that's what it looks like. Your first router isn't getting a clock
from the line. Assuming it
Is IS-IS tested on the ccie lab exam?
Rgds,
Akpome.
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Message Posted at:
The SFM is a piece of junk...and not as useful as you might seem...
The new Supervisor 720 has the SFM built-in...which greatly enhances its
use..
-Original Message-
From: neil K [mailto:[EMAIL PROTECTED]
Sent: Friday, August 29, 2003 5:31 AM
To: [EMAIL PROTECTED]
Subject: Catalyst
CHAP authentication does not use a TCP/UDP port. CHAP is handled in the PPP
protocol between the client and the router. The router may use some other
type of authentication (RADIUS, TACACS+, etc) to authenticate the user to
some outside security server, but the CHAP communications is carried
[EMAIL PROTECTED] wrote:
No, I don't think I have a design issue: the network has 7
clients and 1
server so the architecture is very simple.
Maybe the architecture is simple. That wasn't my point. My point was that a
network design that includes a switch that can't keep up with a client
Go ahead issue command squeez should delete all files in
flashremember whenever you delete a file you must issue squeez too
or else the router gives you another chance see if you really want to do
that.Just a safety catch I guess...
Thank you
Ollie
ATT Common Backbone
866-397-7309 Opt 1
Hi,
I am sorry for such long E-mail, but I have to figure out this for work and
don't know anyone to ask. While searching Internet found this forum.
I am a CCNA and have been working with routers and switches for over 4
years, but recently at work was introduced to Cisco load Balancing switch
Hello all.
I have a problem with pptp to pix. Client has win98 machines on their
network, all behind a DSL router. They connect via MS PPTP to my PIX box.
The connection is fine, without errors. Problem is, they cannot do anything
on my network. If they disconnect from their network, dial up
First you need to upgrade all of the 2500s 16/16 for 12.2 by that
flash/DRAM...check for flash/Dram on E.bay good deals..
Thank you
Ollie
ATT Common Backbone
866-397-7309 Opt 1
-Original Message-
From: PPC-DAT Ep-Ng-Ist [mailto:[EMAIL PROTECTED]
Sent: Friday, August 29, 2003 5:29 AM
You have to upgrade the 2500's to 16MB Memory and 16MB Flash to put 12.2 IOS
on them. However, to do this you need to make sure the Boot ROM version in
each router is at least 10.2(8a). Do a show version on the router to see
what version the Boot ROM is. You can buy memory and flash on many of the
Hi,
I am getting ready to take my lab on my own. I have a practice lab
I wanted to know what is the alternate to using the no sync command
for ibgp to propagate in igp. My routes are showing up but they are
not the best routes. Thanks
Sincerely,
Kiaser A
Message Posted at:
I Cannot even Access it after a restart. no display at all
William Lijewski wrote in message
news:[EMAIL PROTECTED]
Does it display anything when you powercycle the router? Does it display
the bootup information and then freeze?
If it displays the bootup information and then freezes you
have a full mesh network
-Nakul
kaiser anwar wrote in message
news:[EMAIL PROTECTED]
Hi,
I am getting ready to take my lab on my own. I have a practice lab
I wanted to know what is the alternate to using the no sync command
for ibgp to propagate in igp. My routes are showing up but
Hi Nakul,
What I have is Three routers A - B - C
B is a route-reflector A and C are clients b has neigbhor statements
for A and C. but A and C has only one neigbhor towards B which is
a route reflector. A is advertising a netwrok. which is showing up
best route in A but shows up on B
kaiser anwar wrote in message
news:[EMAIL PROTECTED]
Hi Nakul,
What I have is Three routers A - B - C
B is a route-reflector A and C are clients b has neigbhor statements
for A and C. but A and C has only one neigbhor towards B which is
a route reflector. A is advertising a
Hi,
if you are using Hypertrm make sure its using the default
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FAQ,
If you have not takes the CCIE R/S written you might want to study up on
IS-IS
(and of course IS_NT-IS_NT )
PPC-DAT Ep-Ng-Ist wrote in message
news:[EMAIL PROTECTED]
Is IS-IS tested on the ccie lab exam?
Rgds,
Akpome.
**Please support GroupStudy by purchasing from the GroupStudy Store:
Thanks for your reply. I know exactly what you are saying about the lab.
when I do sh ip bgp for any network.
Origin incomplete, metric 0, localpref 100, valid, internal, not
synchronized
when it says not synchronized. thats when the whole issue starts
it does not matter how the network is
I see what you are describing about one router every six months. I am
assuming the power supply is on.
I would recommend you open an TAC case RMA the router. The two biggest
problems Cisco has with the 4000 router chassis are
1] memory stops working because of the seats where the memory fit into
I have a question regarding L3 switches and security
If I have for example an catalyst 3550 swithc with 30 vlans, and don´t want
traffif flowing from vlan to vlan, I just want to allow traffic from the
vlans to go to a special server vlan, and then the internet, but there are
also some groups of
Hi,
I found the following lines at one of the website givings tips for preparing
for CCIE written
In CCIE written exam the multiple choices questions are of 2 types -
Select the best answer or Select all the right answers (They do not
explicitly tell you how many are correct)
I am
What do 'show ip route ' and 'show ip bgp ' show?
Thanks,
Zsombor
kaiser anwar wrote:
Hi,
I am getting ready to take my lab on my own. I have a
practice lab
I wanted to know what is the alternate to using the no sync
command
for ibgp to propagate in igp. My routes are showing
Lupi, Guy wrote in message ...
I am not a security specialist, so please bear with me if this is what
every
IDS device does. I am looking for advice/opinions on a device that can
accomplish the following, I was looking at the Cisco 4250 XL IDS sensor.
Inspect over 400 Mbps of traffic from
Are you preparing to take the new CCNA exams 640-821 (INTRO) and
640-811(ICND)? I offer my exam reviews to help you along the way.
http://www.tcpmag.com/Exams/article.asp?EditorialsID=79
http://www.tcpmag.com/Exams/article.asp?EditorialsID=80
Good luck!
Message Posted at:
Folks,
The Catalyst 6500 uses a Shared bus Architecture and to increase the
Backplane capacity you have to have Switch fabric module (SFM) with fabric
Enabled modules to make it work. Is there a vendor which has a better
architecture or a better solution.
Thanks,
neil K.
Message Posted at:
I got SOHO sites with PPPoE connection to the Internet. They use CHAP for
authentication. I would like to setup an ACL to filter out traffic on the
outside interface. I am wondering what TCP/UDP port CHAP protocol use?
Thanks!
Thomas
Message Posted at:
I need some expert option on the following matter:
I have a Netgear Fast Ethernet Switch FS608 (which does 802.3x Flow
control) connected to a DLink 5 port switch (no flow control)
Twice this week, the FS608 locked itself causing ALL traffic in the company
to be disrupted. The problem was
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