Understanding Cdp; Configuring Cdp; Default Cdp Configuration; Configuring The Cdp Characteristics - Cisco Aironet 1100 Series Installation And Configuration Manual

Understanding CDP

Understanding CDP
Cisco Discovery Protocol (CDP) is a device-discovery protocol that runs on all Cisco network
equipment. Each device sends identifying messages to a multicast address, and each device monitors the
messages sent by other devices. Information in CDP packets is used in network management software
such as CiscoWorks2000.
CDP is enabled on the access point's Ethernet port by default. However, CDP is enabled on the access
point's radio port only when the radio is associated to another wireless infrastructure device, such as an
access point or a bridge.

Configuring CDP

This section contains CDP configuration information and procedures:
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Default CDP Configuration

Table 16-1
Table 16-1 Default CDP Configuration
Feature
CDP global state
CDP interface state
CDP holdtime (packet holdtime in seconds)
CDP timer (packets sent every x seconds)

Configuring the CDP Characteristics

You can configure the CDP holdtime (the number of seconds before the access point discards CDP
packets) and the CDP timer (the number of seconds between each CDP packets the access point sends).
Beginning in Priveleged Exec mode, follow these steps to configure the CDP holdtime and CDP timer.
Command
Step 1 configure terminal
Step 2 cdp holdtime seconds
Cisco Aironet 1100 Series Access Point Installation and Configuration Guide
16-2
Default CDP Configuration, page 16-2
Configuring the CDP Characteristics, page 16-2
Disabling and Enabling CDP, page 16-3
Disabling and Enabling CDP on an Interface, page 16-4
lists the default CDP settings.
Default Setting
Enabled
Enabled
180
60
Purpose
Enter global configuration mode.
(Optional) Specify the amount of time a receiving device should
hold the information sent by your device before discarding it.
The range is from 10 to 255 seconds; the default is 180 seconds.
Chapter 16 Configuring CDP
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