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26-1
Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
26
Configuring CDP
This chapter describes how to configure Cisco Discovery Protocol (CDP) on the Catalyst 4500 series
switch. It also provides guidelines, procedures, and configuration examples.
This chapter includes the following major sections:
• About CDP, page 26-1
• Configuring CDP, page 26-2
Note For complete syntax and usage information for the Cisco IOS commands used in this chapter, refer to the
Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.4:
http://www.cisco.com/en/US/docs/ios/fundamentals/configuration/guide/12_4/cf_12_4_book.html
and the Cisco IOS Configuration Fundamentals Command Reference, Release 12.2:
http://www.cisco.com/en/US/docs/ios/12_2/configfun/command/reference/ffun_r.html
Note For complete syntax and usage information for the switch commands used in this chapter, look at the
Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:
http://www.cisco.com/en/US/products/hw/switches/ps4324/index.html
If the command is not found in the Catalyst 4500 Command Reference, it is located in the larger Cisco
IOS library. Refer to the Cisco IOS Command Reference and related publications at this location:
http://www.cisco.com/en/US/products/ps6350/index.html
About CDP
CDP is a protocol that runs over Layer 2 (the data link layer) on all Cisco routers, bridges, access servers,
and switches. CDP allows network management applications to discover Cisco devices that are
neighbors of already known devices, in particular, neighbors running lower-layer, transparent
protocols.With CDP, network management applications can learn the device type and the SNMP agent
address of neighboring devices. CDP enables applications to send SNMP queries to neighboring devices.
CDP runs on all LAN and WAN media that support Subnetwork Access Protocol (SNAP).