The easiest way to block cdp on an interface would be to diable cdp on the
interface that you didn't want to run cdp on. CDP is disable per router
with the command 'no cdp run' or per interface with 'no cdp enable'.
If you are just trying to use an ACL you can block the MAC Multicast address
of 01-00-0C-CC-CC-CC. Just keep in mind that CDP is not the only protocol
that uses the multicast MAC address. I'm not positive of all the procotols
that use this address, but of the top of my head I believe that VTP uses the
same address.
Regards,
Aaron K. Dixon
WAN Element Manager - Cisco
Omnes, A Schlumberger Company
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Aaron Prather
Sent: Tuesday, June 27, 2000 4:58 PM
To: [EMAIL PROTECTED]
Subject: Can you block CDP with an access list???
If you can what protocol does it use? UDP? i know its a protocol in
itself, but can this be done? what port number?
Thanks guys,
Aaron
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