Cisco Discovery Protocol (CDP)

Cisco Discovery Protocol



CAUTION: Although CDP is necessary for some management applications, CDP should still be disabled in some instances.

Disable CDP globally if

• CDP is not required at all.

• The device is located in an insecure environment.

Use the command no cdp run to disable CDP globally:

RouterOrSwitch(config)#no cdp run

Disable CDP on any interface if

• Management is not being performed.

• The switch interface is a nontrunk interface.

• The interface is connected to a nontrusted network.

Use the interface configuration command no cdp enable to disable CDP on a specific interface:

RouterOrSwitch(config)#interface fastethernet 0/1
RouterOrSwitch(config-if)#no cdp enable