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678 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Reading CDP packets
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The same commands clear information for both FDP and CDP.
Clearing FDP and CDP neighbor information
To clear the information received in FDP and CDP updates from neighboring devices, enter the
following command.
PowerConnect# clear fdp table
Syntax: clear fdp table
NOTE
This command clears all the updates for FDP and CDP.
Clearing FDP and CDP statistics
To clear FDP and CDP statistics, enter the following command.
PowerConnect# clear fdp counters
Syntax: clear fdp counters
Reading CDP packets
Cisco Discovery Protocol (CDP) packets are used by Cisco devices to advertise themselves to other
Cisco devices. By default, Dell PowerConnect devices forward these packets without examining
their contents. You can configure a Dell PowerConnect device to intercept and display the contents
of CDP packets. This feature is useful for learning device and interface information for Cisco
devices in the network.
Dell PowerConnect devices support intercepting and interpreting CDP version 1 and version 2
packets.
NOTE
The Dell PowerConnect device can interpret only the information fields that are common to both CDP
version 1 and CDP version 2.
NOTE
When you enable interception of CDP packets, the Dell PowerConnect device drops the packets. As
a result, Cisco devices will no longer receive the packets.
Enabling interception of CDP packets globally
To enable the device to intercept and display CDP packets, enter the following command at the
global CONFIG level of the CLI.
PowerConnect(config)# cdp run
Syntax: [no] cdp run
The feature is disabled by default.