I have 2 routers. They are connected back to back via serial port. The
routers Ethernet ports are connected to a switch. When I use show cdp nei on
any of the router, I only see information about the switch. Why is it so?
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Tony van Ree
Sent: Wednesday, December 13, 2000 3:41 PM
To: CCIE TB; [EMAIL PROTECTED]
Subject: Re: What can CDP offer ?
Hi Adia,
I have found that CDP allows a bundle of good things. Below are some
examples,
A couple of switches on different LAN's the client tells me are configured
correctly on each LAN with the correct SNMP community name cannot be
discovered using SNMP and he cannot Telnet to them. I am the supplier of
the routers.
I perform a "sh cdp nei det" and in an instant can tell my client what he
has done is configured the switches on a bench in his office. Put them into
the car and delivered each switch to the wrong building and therefore the
switches are configured for a different LAN.
On an FDDI link a major client can see the services on the ring but cannot
get data from point A to B. A quick glipmse "sh cdp nei det" once again
reveals the two routers in question have an IP address mixup. In this case
both the same IP address. Looking through the ARP table would confirm this
but the there were several hundred entries there.
I wanted to know if I had exactly matched my drawing for a switched network
having some 50 2900XL switches going into a 5500. I also needed to document
serial no.s etc. "sh cdp nei" gave me where the switches were. It was a
simple matter antering the data into the 5500 so this was in a sense self
documenting. A cut and paste of the details gave me the resto of my doco.
When IP, AppleTalk and/or IPX fails CDP might still be there and show
config issues.
CDP is very handy.
Teunis,
Hobart, Tasmania
Australia
On Tuesday, December 12, 2000 at 11:25:44 PM, CCIE TB wrote:
> Hi group members,
>
> I'm just wondering...if you can access a router by telneting to it, you
can
> get most of the information that you will get through CDP. Then what is
the
> benefit of CDP?
>
> Thanks to all
>
> Adia
>
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