CDP and LLDP

r1(config)# cdp run

cdp run … cdp is usually turned on but if it’s not the command above turns it on

r1(config)# show cdp neighbors

shows you what it’s plugged into

Only cisco devices.

 

Link Layer Discovery Protocol

LLDP

r1(config)# lldp run

This one is not usually turned on so you have to manually turn it on.

shows you what it’s plugged into

All devices. IEEE standard.

 

 

 

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