User Manual User guide

Rockwell Automation Publication 1783-UM006A-EN-P - May 2014 499
Chapter 18
Configuring CDP
This chapter describes how to configure Cisco Discovery Protocol (CDP) on
your access point. If you are not going to use CDP, we recommend that you turn
the feature off.
For information about configuring CDP in Device Manager, see CDP Page
on
page 138.
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 Ethernet port by default. However, CDP is
enabled only on the access point radio port when the radio is associated to
another wireless infrastructure device, such as an access point or a bridge. CDP is
sent on the lowest VLAN number configured on the access point. When more
than on VLAN is used in a wireless network, We recommend that the lowest
VLAN number configured be used as the native VLAN
IMPORTANT
For complete syntax and usage information for the commands used in this
chapter, see these publications:
• Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges
• Cisco IOS Configuration Fundamentals Command Reference for Release
12.2
Topic Page
Understanding CDP 499
Configuring CDP 500
Monitoring and Maintaining CDP 503
Default CDP Configuration 500
Configuring the CDP Characteristics 500
Disabling and Enabling CDP 501
Disabling and Enabling CDP on an Interface 501
IMPORTANT
For best performance on your wireless LAN, disable CDP on all radio interfaces
and on sub-interfaces if VLANs are enabled on the access point.