CDP: Cisco Discovery Protocol

Written by vaheeD on December 29, 2012

4.00 avg. rating (84% score) - 1 vote

CDP: Cisco Discovery Protocol is a Cisco proprietary protocol that allows you discover directly connected Cisco devices. It is a data link layer (layer 2) network protocol and it send announcements to the multicast destination address 01-00-0c-cc-cc-cc.

Checking all neighbors

show cdp neighbors
show cdp neighbors detail
show cdp entry *

Checking specific neighbor

show cdp entry <Device ID>

Disabling CDP per interface

configure terminal 
interface gigabitEthernet 1/0/1
no cdp enable 
exit
exit

Disabling CDP globaly

configure terminal 
no cdp run
exit