Administrator Guide

Table Of Contents
Changes to Call Admission Control
In ArubaOS 6.4.x,CAC is not applied for Lync calls. Lync calls are allowed to flow with high priority irrespective
of the call count or bandwidth based CAC limit. This applies to calls prioritized by both media classification and
SDN API based Lync ALG. CAC configured under wlan voip-cac-profile and Virtual AP (VAP) based bandwidth
limitation under wlan traffic-management-profile does not apply to Lync calls.
Troubleshooting and Log Messages
When you report any UCC related issues, collect the STM, UCM, and tech-support logs.
To enable VoIP ALG related debug logs:
(host) (config) # logging level debugging user process stm subcat voice
To enable UCM related debug logs:
(host) (config) #logging level debugging user process ucm
(host) (config) #logging level debugging system process ucm
Collect the output of the following commands:
l show datapath session table
The RTP sessions are tagged with the Q flag indicating real time analysis is computed for the session.
l show datapath application
l show datapath user
l show rights
l show datapath acl <id>
l show datapath session
l show voice real-time-config
Verify the RTP analysis for an active call by issuing the following command:
(host)#show voice real-time-analysis
While a Lync call is active, the output of this command displays the current delay, jitter, packet loss, and UCC
score of the client. This command displays any data only if the client is on an active call.
UCC Limitations
l Voice ALGs should not be enabled when voice clients are behind a NAT.
l Media classification does not work when user VLAN has IP NAT configured.
l When using media classification, UCC score, jitter, delay, and packet loss is calculated only for voice RTP
streams. These metrics are not available for video streams.
l Media classification does not work in split-tunnel forwarding mode.
l When VoIP calls are prioritized using media classification, end-to-end call quality metrics such as Mean
Opinion Score (MOS), delay, jitter, and packet loss are not available.
l UCC score is calculated for voice calls and desktop-sharing sessions only.
l For Lync calls, MOS is generated only for voice calls. Lync server does not generate MOS for video calls,
desktop-sharing, and file-transfer sessions.
Understanding Extended Voice and Video Features
This section describes the other voice and video-related functionalities that are available on the controller.
Dell Networking W-Series ArubaOS 6.4.x | User Guide Voice and Video | 1001