CDP does not "find fellow devices", it is more like a beacon, periodically
anouncing itself to anyone who would listen. If you would like to listen,
type in:
show cdp neighbors
If CDP is enabled on other Cisco network devices, you will see something
like:
Capability Codes: R - Router, T -
on Proxy Arp and CDP.
Original Message Follows
From: "Scoles, Damian" [EMAIL PROTECTED]
Reply-To: "Scoles, Damian" [EMAIL PROTECTED]
To: "'[EMAIL PROTECTED]'" [EMAIL PROTECTED]
Subject: CDP Confusion
Date: Sat, 23 Sep 2000 19:20:03 -0500
I am trying to figure ou
"Scoles, Damian" wrote:
routers). What I am confused about is that I read somewhere that it can
pick up the layer 3 (or was it layer 2?) address on interface cards on the
devices it discovers.
CDP includes information on layer 3 addresses etc. but doesnt use them
to transmit the CDP
I am trying to figure out exactly what CDP does. IF I understand it
correctly it simply finds fellow cisco devices on the network (switches,
routers). What I am confused about is that I read somewhere that it can
pick up the layer 3 (or was it layer 2?) address on interface cards on the
devices
CDP is a data-link layer protocol and includes
information such as interface address's, IOS version,
etc. If you use On demand routing then the router
configured for ODR will place routes in the routing
table from CDP packets. ODR is configured on one
router only - not both ends.
--- "Scoles,
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