Configuring Quality Of Service Profiles - Cisco SD2008T-NA Configuration Manual

Chapter 6 Configuring WLANsWireless Device Access
Note
Enabling 7920 Support Mode
The 7920 support mode contains two options:
•
•
Note
Enter this command to enable 7920 support mode for phones that require client-controlled CAC:
config wlan 7920-support client-cac-limit {enabled | disabled} wlan-id
Note
Enter this command to enable 7920 support mode for phones that require access point-controlled CAC:
config wlan 7920-support ap-cac-limit {enabled | disabled} wlan-id
QBSS Information Elements Sometimes Degrade 7920 Phone Performance
If your WLAN contains both 1000 series access points and Cisco 7920 wireless phones, do not enable
the WMM or AP-CAC-LIMIT QBSS information elements. Do not enter either of these commands:
config wlan 7920-support ap-cac-limit enable wlan-id
config wlan wmm [allow | require] wlan-id
The information sent by 1000 series access points in the WMM and AP-CAC-LIMIT QBSS information
elements is inaccurate and could result in degradation of voice quality 7920 wireless phones. This issue
does not affect the CLIENT-CAC-LIMIT QBSS IE, which you enable using this command:
config wlan 7920-support client-cac-limit enable wlan-id
The CLIENT-CAC-LIMIT QBSS IE is the only QBSS IE that should be used in networks containing
both 1000 series access points and 7920 wireless phones.

Configuring Quality of Service Profiles

You can use the GUI or CLI to configure the Platinum, Gold, Silver, and Bronze QoS profiles.
Using the GUI to Configure QoS Profiles
To configure the Platinum, Gold, Silver, and Bronze QoS profiles using the GUI, follow these steps.
Disable the 802.11a and 802.11b/g networks so that you can configure the QoS profiles.
Step 1
OL-1926-06OL-9141-03
When the controller is in Layer 2 mode and WMM is enabled, you must put the access points on
a trunk port in order to allow them to join the controller.
Support for 7920 phones that require call admission control (CAC) to be configured on and
advertised by the client device (these are typically older 7920 phones)
Support for 7920 phones that require CAC to be configured on and advertised by the access point
(these are typically newer 7920 phones)
When access point-controlled CAC is enabled, the access point sends out a Cisco proprietary
CAC Information Element (IE) and does not send out the standard QBSS IE.
You cannot enable both WMM mode and client-controlled CAC mode on the same WLAN.
Cisco Wireless LAN Controller Configuration Guide
Configuring WLANs
6-19