CHAPTER 23
Configuring the Cisco Discovery Protocol
•
Finding Feature Information, page 431
•
Information About CDP, page 431
•
How to Configure CDP, page 432
•
Monitoring and Maintaining CDP, page 441
•
Additional References, page 442
•
Feature History and Information for Cisco Discovery Protocol, page 443
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see Bug Search Tool and the release notes for your platform and software release. To
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.
Information About CDP
CDP Overview
CDP is a device discovery protocol that runs over Layer 2 (the data-link layer) on all Cisco-manufactured
devices (routers, bridges, access servers, controllers, and switches) and allows network management applications
to discover Cisco devices that are neighbors of already known devices. With CDP, network management
applications can learn the device type and the Simple Network Management Protocol (SNMP) agent address
of neighboring devices running lower-layer, transparent protocols. This feature enables applications to send
SNMP queries to neighboring devices.
CDP runs on all media that support Subnetwork Access Protocol (SNAP). Because CDP runs over the data-link
layer only, two systems that support different network-layer protocols can learn about each other.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
431
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