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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-30644-01
Chapter 17 Configuring CDP
Monitoring and Maintaining CDP
Monitoring and Maintaining CDP
To monitor and maintain CDP on your device, perform one or more of these tasks, beginning in
privileged EXEC mode.
Below are six examples of output from the CDP show privileged EXEC commands:
AP# show cdp
Global CDP information:
Sending CDP packets every 50 seconds
Sending a holdtime value of 120 seconds
AP# show cdp entry *
-------------------------
Device ID: AP
Entry address(es):
IP address: 10.1.1.66
Platform: cisco WS-C3550-12T, Capabilities: Switch IGMP
Interface: GigabitEthernet0/2, Port ID (outgoing port): GigabitEthernet0/2
Holdtime : 129 sec
Version :
Cisco Internetwork Operating System Software
IOS (tm) C3550 Software (C3550-I5Q3L2-M), Experimental Version 12.1(20010612:021
316) [jang-flamingo 120]
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Fri 06-Jul-01 18:18 by jang
advertisement version: 2
Command Description
clear cdp counters Reset the traffic counters to zero.
clear cdp table Delete the CDP table of information about neighbors.
show cdp Display global information, such as frequency of transmissions and the holdtime
for packets being sent.
show cdp entry
entry-name
[protocol
| version]
Display information about a specific neighbor.
You can enter an asterisk (*) to display all CDP neighbors, or you can enter the
name of the neighbor about which you want information.
You can also limit the display to information about the protocols enabled on the
specified neighbor or information about the version of software running on the
device.
show cdp interface [type number] Display information about interfaces where CDP is enabled.
You can limit the display to the type of interface or the number of the interface
about which you want information (for example, entering gigabitethernet 0/1
displays information only about Gigabit Ethernet port 1).
show cdp neighbors [type number]
[detail]
Display information about neighbors, including device type, interface type and
number, holdtime settings, capabilities, platform, and port ID.
You can limit the display to neighbors on a specific type or number of interface
or expand the display to provide more detailed information.
show cdp traffic Display CDP counters, including the number of packets sent and received and
checksum errors.