Configuring for Network Management Applications

CDP

CDP

CDP Features

Feature

Default

Menu

CLI

Web

view the switch’s CDP configuration

n/a

page 13-32

view the switch’s CDP Neighbors table

n/a

page 13-32

clear (reset) the CDP Neighbors table

n/a

page 13-33

enable or disable CDP on the switch

enabled

page 13-34

enable or disable CDP operation on an

enabled

page 13-35

individual port

 

 

 

 

change the transmit interval for the switch’s

60 seconds

page 13-36

CDP packets

 

 

 

 

change the hold time (time-to-live for CDP

180 seconds

page 13-36

packets the switch generates)

 

 

 

 

 

 

 

 

 

Introduction

In the switches covered in this guide, CDP-v1 (Cisco Discovery Protocol, version 1) provides data that aids SNMP-based network mapping utilities designed to discover devices running CDP in a network. To make this data available, the switch transmits information about itself via CDP packets to adjacent devices, and also receives and stores information about adjacent devices running CDP. This enables each CDP device to receive and maintain identity data on each of its CDP neighbors and pass this information off to an SNMP utility designed to query the CDP area of the device’s MIB.

Note

To take advantage of CDP in the switch, you should have a working knowledge of SNMP operation and an SNMP utility capable of polling the switches for CDP data. HP’s implementation of CDP places specific data into the switch’s Management Information Base (MIB). However, retrieval of this data for network mapping is dependent on the operation of your SNMP utility. Refer to the documentation provided with the utility.

13-25