Cisco Systems ME 3400 Disabling and Enabling CDP

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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide

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Chapter 23 Configuring CDP Configuring CDP

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 “Monitoring and Maintaining CDP” section on page 23-5.

Disabling and Enabling CDP

CDP is enabled by default on NNIs. It is disabled by default on ENIs but can be enabled.

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 globally disable the CDP device discovery

capability:

Beginning in privileged EXEC mode, follow these steps to globally enable CDP when it has been

disabled:

This example shows how to globally enable CDP if it has been disabled.

Switch# configure terminal

Switch(config)# cdp run

Switch(config)# end

Step 5 end Return to privileged EXEC mode.

Step 6 show cdp Verify your settings.

Step 7 copy running-config startup-config (Optional) Save your entries in the configuration file.

Command Purpose

Step 1 configure terminal Enter global configuration mode.

Step 2 no cdp run Disable CDP.

Step 3 end Return to privileged EXEC mode.

Command Purpose

Step 1 configure terminal Enter global configuration mode.

Step 2 cdp run Enable CDP after disabling it.

Step 3 end Return to privileged EXEC mode.