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Chapter 22
Configuring CDP
Command
Step 6
show cdp
Step 7
copy running-config startup-config
Use the no form of the CDP commands to return to the default settings.
This example shows how to configure CDP characteristics.
Switch# configure terminal
Switch(config)# cdp timer 50
Switch(config)# cdp holdtime 120
Switch(config)# cdp advertise-v2
Switch(config)# end
For additional CDP show commands, see the
Disabling and Enabling CDP
CDP is enabled by default on NNIs.
Note
Cisco devices (such as Cisco IP Phones) regularly exchange CDP messages with connected devices.
Disabling CDP can interrupt device connectivity.
Beginning in privileged EXEC mode, follow these steps to disable the CDP device discovery capability:
Command
Step 1
configure terminal
Step 2
no cdp run
Step 3
end
Beginning in privileged EXEC mode, follow these steps to enable CDP when it has been disabled:
Command
Step 1
configure terminal
Step 2
cdp run
Step 3
end
This example shows how to enable CDP if it has been disabled.
Switch# configure terminal
Switch(config)# cdp run
Switch(config)# end
78-17058-01
Purpose
Verify your settings.
(Optional) Save your entries in the configuration file.
"Monitoring and Maintaining CDP" section on page
Purpose
Enter global configuration mode.
Disable CDP.
Return to privileged EXEC mode.
Purpose
Enter global configuration mode.
Enable CDP after disabling it.
Return to privileged EXEC mode.
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
Configuring CDP
22-5.
22-3
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Troubleshooting
