Cisco Cisco Access Registrar 4.2 Specifikace stáhnout pdf (Strana 330)

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Cisco Wireless LAN Controller Configuration Guide

OL-13826-01

Chapter 7 Controlling Lightweight Access Points

Cisco Aironet 1510 Series Lightweight Outdoor Mesh Access Points

Note If you upgrade to software release 4.0 or later from a previous release, your root access points

default to the meshAP role. You must reconfigure them for the rootAP role.

Step 3 To assign this AP1510 to a bridge group, enter this command:

config ap bridgegroupname set groupname Cisco_AP

Step 4 To specify the rate (in Kbps) at which data is shared between access points on the backhaul interface,

enter this command:

config ap bhrate rate Cisco_AP

The default value is 18 Kbps for the 802.11a backhaul interface.

Step 5 To save your settings, enter this command:

save config

Configuring Voice and Video Parameters in Mesh Networks

You can configure call admission control (CAC) on the controller to manage voice and video quality on

the mesh network. CAC enables an access point to maintain controlled quality of service (QoS) when

the wireless LAN is experiencing congestion. The Wi-Fi Multimedia (WMM) protocol deployed in

CCXv3 ensures sufficient QoS as long as the wireless LAN is not congested. However, in order to

maintain QoS under differing network loads, CAC in CCXv4 or later is required.

Note CAC is supported in Cisco Compatible Extensions (CCX) v4 or later. See the “Configuring Cisco Client

Extensions” section on page 6-19 for more information on CCX.

Two types of CAC are available for lightweight access points: bandwidth-based CAC and load-based

CAC. All calls on a mesh network are bandwidth-based, so mesh access points use only bandwidth-based

CAC. Bandwidth-based, or static, CAC enables the client to specify how much bandwidth or shared

medium time is required to accept a new call. Each access point determines whether it is capable of

accommodating a particular call by looking at the bandwidth available and compares it against the

bandwidth required for the call. If there is not enough bandwidth available to maintain the maximum

allowed number of calls with acceptable quality, the access point rejects the call.

Note When voice is operating on a mesh network, calls should not traverse more than three hops.

The QoS setting for a WLAN determines the level of bandwidth-based CAC support. To use

bandwidth-based CAC with voice applications, the WLAN must be configured for Platinum QoS. To use

bandwidth-based CAC with video applications, the WLAN must be configured for Gold QoS. Also,

make sure that WMM is enabled for the WLAN. See the “Configuring 802.3 Bridging” section on page

4-14 for QoS and WMM configuration instructions.

Note You must enable admission control (ACM) for CCXv4 or v5 clients that have WMM enabled. Otherwise,

bandwidth-based CAC does not operate properly.

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