Owners manual
By customizing WMM AC mappings, all packets received are matched against the entries in the mapping table and
prioritized accordingly. The mapping table contains information for upstream (client to IAP) and downstream (IAP to
client) traffic.
You can configure different WMM to DSCP mapping values for each WMM AC when configuring an SSID profile
either in the Instant UI or CLI.
In the Instant UI
1. Navigate to the WLAN wizard (click Network>New or Network> Select the WLAN SSID>edit).
2. Click Show advanced options under WLAN Settings.
3. Specify the appropriate DSCP mapping value within a range of 0-63 for the following access categories in the
DSCP mapping field:
l Background WMM — DSCP mapping for the background traffic.
l Best effort WMM — DSCP mapping for the best-effort traffic.
l Video WMM — DSCP mapping for the video traffic.
l Voice WMM — DSCP mapping for the voice traffic.
4. Click Next and complete the configuration as required.
In the CLI
(Instant AP)(config)# wlan ssid-profile <name>
(Instant AP)(SSID Profile <name>)# wmm-background-dscp <dscp>
(Instant AP)(SSID Profile <name>)# wmm-best-effort-dscp <dscp>
(Instant AP)(SSID Profile <name>)# wmm-video-dscp <dscp>
(Instant AP)(SSID Profile <name>)# wmm-voice-dscp <dscp>
(Instant AP)(SSID Profile <name>)# end
(Instant AP)# commit apply
You can configure up to 8 DSCP mappings values within the range of 0-63. You can also configure a combination of
multiple values separated by a comma, for example, wmm-voice-dscp 46,44,42,41.
QoS for Microsoft Office OCS and Apple Facetime
Voice and video devices use a signaling protocol to establish, control, and terminate voice and video calls. These
control or signaling sessions are usually permitted using pre-defined ACLs. If the control signaling packets are
encrypted, the IAP cannot determine the dynamic ports are used for voice or video traffic. In these cases, the IAP
has to use an ACL with the classify-media option enabled to identify the voice or video flow based on a deep packet
inspection and analysis of the actual traffic. Instant identifies and prioritizes voice and video traffic from applications
such as Microsoft Office Communications Server (OCS) and Apple Facetime.
Microsoft OCS
Microsoft Office Communications Server (OCS) uses Session Initiation Protocol (SIP) over TLS to establish,
control, and terminate voice and video calls.
Apple Facetime
When an Apple device starts a Facetime video call, it initiates a TCP session to the Apple Facetime server over port
5223, then sends SIP signaling messages over a non-default port. When media traffic starts flowing, audio and video
data are sent through that same port using RTP. (The audio and video packets are interleaved in the air, though
individual the sessions can be uniquely identified using their payload type and sequence numbers.) The RTP header
and payload also get encapsulated under the TURN ChannelData Messages. The Facetime call is terminated with a
SIP BYE message that can be sent by either party.
Aruba Instant 6.4.0.2-4.1 | User Guide Voice and Video | 254