Cisco Cisco Aironet 1522 Lightweight Outdoor Mesh Access Point 디자인 가이드

If a wireless client is not associated with a WGB, use the following steps to troubleshoot the problem:

Verify the client configuration and ensure that client configuration is correct.

Check the show bridge command output in autonomous AP, and confirm that the AP is reading the 
client MAC address from the right interface.

Confirm that the subinterfaces corresponding to specific VLANs in different interfaces are mapped 
to the same bridge group.

If required, clear the bridge entry using the clear bridge command (remember that this command 
will remove all wired and wireless clients associated in WGB and make them associate again). 

Check the show dot11 association command output and confirm that the WGB is associated with 
the controller.

Ensure that the WGB has not exceeded its 20-client limitation.

In a normal scenario, if the show bridge and show dot11 association command outputs are as expected, 
wireless client association should be successful.

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

The indoor mesh access points (1130 and 1240) are 802.11e capable, and QoS is supported on the local 
2.4-GHz access radio and the 5-GHz backhaul radio. CAC is supported on the backhaul and the CCXv4 
clients (which provides CAC between the mesh access point and the client).

Voice is supported only on indoor mesh networks. Voice is supported on a best-effort basis in the 
outdoors in a mesh network.

CAC enables a mesh 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, to maintain QoS under differing 
network loads, CAC in CCXv4 or later is required.

CAC is supported in Cisco Compatible Extensions (CCX) v4 or later. See Chapter 6 of the Cisco Wireless 
LAN Controller Configuration Guide, Release 7.0 at 

Two types of CAC are available for 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 mesh access point rejects the call.