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Cisco Wireless LAN Controller Configuration Guide
OL-13826-01
Chapter 4 Configuring Controller SettingsWireless Device Access
Configuring Voice and Video Parameters
Step 4 To save your changes, enter this command:
save config
Step 5 To see a list of the current QoS roles and their bandwidth parameters, enter this command:
show netuser guest-roles
Information similar to the following appears:
Role Name........................................ Contractor
Average Data Rate........................... 10
Burst Data Rate............................. 10
Average Realtime Rate....................... 100
Burst Realtime Rate......................... 100
Role Name........................................ Vendor
Average Data Rate........................... unconfigured
Burst Data Rate............................. unconfigured
Average Realtime Rate....................... unconfigured
Burst Realtime Rate...................... unconfigured
Configuring Voice and Video Parameters
Three parameters on the controller affect voice and/or video quality:
• Call admission control
• Expedited bandwidth requests
• Unscheduled automatic power save delivery
Each of these parameters is supported in Cisco Compatible Extensions (CCX) v4 and v5. See the
“Configuring Cisco Client Extensions” section on page 6-35 for more information on CCX.
Note CCX is not supported on the AP1030.
Traffic stream metrics (TSM) can be used to monitor and report issues with voice quality.
Call Admission Control
Call admission control (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 is required. Two types of CAC are
available: bandwidth-based CAC and load-based CAC.
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 and in turn enables the access point to determine whether it is
capable of accommodating this particular call. The access point rejects the call if necessary in order to
maintain the maximum allowed number of calls with acceptable quality.
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