Cisco Cisco Access Registrar 4.2 Specifikace stáhnout pdf (Strana 164)

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Cisco Wireless LAN Controller Configuration Guide

OL-13826-01

Chapter 4 Configuring Controller SettingsWireless Device Access

Configuring Cisco Discovery Protocol

Step 5 To enable or disable MAC optimization for voice, enter this command:

config advanced {802.11a | 802.11b} voice-mac-optimization {enable | disable}

This feature enhances voice performance by controlling packet retransmits and appropriately aging out

voice packets on lightweight access points, thereby improving the number of voice calls serviced per

access point. The default value is disabled.

Step 6 To re-enable the radio network, enter this command:

config {802.11a | 802.11b} enable network

Step 7 To save your settings, enter this command:

save config

Configuring Cisco Discovery Protocol

Cisco Discovery Protocol (CDP) is a device discovery protocol that runs on all Cisco-manufactured

equipment. A device enabled with CDP sends out periodic interface updates to a multicast address in

order to make itself known to neighboring devices.

The default value for the frequency of periodic transmissions is 60 seconds, and the default advertised

time-to-live value is 180 seconds. The second and latest version of the protocol, CDPv2, introduces new

time-length-values (TLVs) and provides a reporting mechanism that allows for more rapid error tracking,

thereby reducing down time.

CDPv1 and CDPv2 are supported on the following devices:

• 2000, 2100, and 4400 series controllers

Note CDP is not supported on the controllers that are integrated into Cisco switches and routers,

including those in the Catalyst 3750G Integrated Wireless LAN Controller Switch, the Cisco

WiSM, and the Cisco 28/37/38xx Series Integrated Services Router. However, you can use

the show ap cdp neighbors [detail] {Cisco_AP | all} command on these controllers in order

to see the list of CDP neighbors for the access points that are connected to the controller.

• LWAPP-enabled access points

• 1000 series access points that run VxWorks

• An access point connected directly to a 2000 or 2100 series controller

This support enables network management applications to discover Cisco devices.

These TLVs are supported by both the controller and the access point:

• Device-ID TLV: 0x0001—The host name of the controller, the access point, or the CDP neighbor.

• Address TLV: 0x0002—The IP address of the controller, the access point, or the CDP neighbor.

• Port-ID TLV: 0x0003—The name of the interface on which CDP packets are sent out.

• Capabilities TLV: 0x0004—The capabilities of the device. The controller sends out this TLV with

a value of Host: 0x10, and the access point sends out this TLV with a value of Transparent Bridge:

0x02.

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