699| Voice and Video DellPowerConnect W- Series ArubaOS 6.2 | User Guide
nDSCP mapping for WMMvoic e AC—DSCP used to map voice traffic
nDSCP mapping forWMM video AC—DSCP used to map video traffic
nDSCP mapping forWMM best-effort AC—DSCP used to map best-efforttraffic
nDSCP mapping for WMMbackground AC—DSCP used to map background traffic
7. Click A pply.
The followingenhancements have been made to the WMM-DSCP mapping functionality:
lWhena controller is upgraded to 6.2 version from an older version,the default as well as the user configured
WMM-DSCP mappingsi n the existing SSID profiles are retained.
lDefault mappingsare not there for a newly created SSID profile and for a factory default controllerrunning 6.2
image.
lIf the mappinghas no value, the original DSCP for upstream traffic is retained.
lThe maximumnumber of values that can be configured for WMM-DSCP is 8.
lFor the upstreamtraffic, if the mapping exists and incoming DSCP value matches one of the mapped values
then the DSCP value is retained
lFor the upstreamtraffic, if the mapping exists and incoming DSCP value does not match any of the mapped
valuest henthe DSCP value is overwritten wi th the first valuein the WMM- DSCP list
lFor Wirelessto Wireless Traffic:If the A C of the incoming packet hasno mapping and the incoming DSCP
valuei s mappedto a different AC, then the DSCP value is retained andWMM priority is changed to the
correspondingAC where incoming DSCP is mapped.

Using the CLI to map betweenWMM AC and DSCP

wlan ssid-profile <profile>
wmm-be-dscp <best-effort>
wmm-bk-dscp <background>
wmm-vi-dscp <video>
wmm-vo-dscp <voice>
Configuring DSCP Prioriti es
You can configureD SCP priorities for WMM packets in the following ways:
lConfigurethe DSCP mappings in the SSID profile
lSet a ToS value in the ACL
lSet the ToS valueas well as the 802 .1pprio rity in the ACL
Setting a ToS valuei nt heA CL overridest hedefault DSCP mappings configured in the SSID profile. Configuringa
DSCP priority in both the L2 and L3 header prioritizes the WMM packets with the higher value.
For example,we can have different ToS valuesset for different voice traffic in a network. To prioritize allo fthem in
the voice queue,we can set the 802.1p priority to voic e.
Consider a deployment whereCi sco Softphone, Lync, and Scopia are configuredwi th the following DSCP :
lCisco Softphone - DSCP 46
lLync - DSCP 44
lScopia - DSCP 42
In the absence of doing anything,all of the DSCP above would map into the Video queue. To map all the traffic
into Voice queue you can do the following ACL configuration:
wlan ssid-profile VOICE
wmm-vo-dscp 46
ip access-list session VOICE