Clearing Fdp And Cdp Information; Reading Cdp Packets - HP ProCurve 9304M Installation And Configuration Manual

This example shows information for Ethernet port 2/3. The port sends FDP updates every 5 seconds. Neighbors
that receive the updates can hold them for up to 180 seconds before discarding them.
Syntax: show fdp interface [ethernet <portnum>]
The ethernet <portnum> parameter lists the information only for the specified interface.
Displaying FDP and CDP Statistics
To display FDP and CDP packet statistics, enter the following command:
HP9300A# show fdp traffic
CDP/FDP counters:
Total packets output: 6, Input: 5
Hdr syntax: 0, Chksum error: 0, Encaps failed: 0
No memory: 0, Invalid packet: 0, Fragmented: 0
Internal errors: 0
Syntax: show fdp traffic

Clearing FDP and CDP Information

You can clear the following FDP and CDP information:
• Information received in FDP and CDP updates
• FDP and CDP statistics
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:
HP9300# 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:
HP9300# 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, HP devices forward these packets without examining their contents. You can configure an
HP 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.
HP software release 07.5.xx supports intercepting and interpreting CDP version 1 packets. Software release
07.6.04 extends CDP support to version 2 packets. In 07.6.04 and later, when you enable CDP support, support
for both CDP versions is enabled.
NOTE: The HP device can interpret only the information fields that are common to both CDP version 1 and CDP
version 2.
Enabling the FDP and Reading Cisco Discovery Protocol (CDP) Packets
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