WMM QoS Mode
337
You also can use ACLs to override marking for specific packets. Configure
ACEs that use the
dscp
option to match on ingress DSCP value, and use
the
cos
option to mark CoS. A CoS value assigned by an ACE overrides
the internal CoS value. (For information, see “Using ACLs to Change
CoS” on page 399.)
WMM QoS on a MAP
MAPs use forwarding queues to prioritize traffic for wireless clients.
For a packet received by the MAP from a client, the MAP classifies the
packet based on the service type in the 802.11 header and maps the
service type value to an internal CoS value. The MAP then marks the
DSCP value in the IP tunnel header to the WX switch based on the
internal CoS value.
For a packet received from a WX switch and addressed to a client, the
MAP classifies the packet by mapping the DSCP value in the IP tunnel
header to an internal CoS value. The MAP then assigns the packet to a
forwarding queue based on the internal CoS value. The MAP also marks
the service type in the 802.11 header based on the internal CoS value.
A MAP uses the DSCP-to-CoS and CoS-to-DSCP mappings of the WX
switch that is managing it. If you change mappings on a WX switch, the
change also applies to the MAP. Likewise, if a MAP changes to another
WX switch (for example, after a MAP restart), the MAP uses the
mappings in effect on the new WX.
If the
use-client-dscp
option is enabled for a service profile, WMM QoS
is ignored, and the QoS level is classified based on the DSCP value.
802.11 data packets without WMM are classified as QoS level 0 unless
static CoS is enabled or the
use-client-dscp
option is enabled.
Table 28 lists the default mappings between a MAP’s internal CoS values
and its forwarding queues.
Table 28
Default CoS-to-MAP-Forwarding-Queue Mappings
CoS
MAP Forwarding Queue
1 or 2
Background
0 or 3
Best Effort
4 or 5
Video
6 or 7
Voice
Summary of Contents for 3CRWX120695A
Page 138: ...138 CHAPTER 6 CONFIGURING AND MANAGING IP INTERFACES AND SERVICES ...
Page 272: ...272 CHAPTER 11 CONFIGURING RF LOAD BALANCING FOR MAPS ...
Page 310: ...310 CHAPTER 13 CONFIGURING USER ENCRYPTION ...
Page 322: ...322 CHAPTER 14 CONFIGURING RF AUTO TUNING ...
Page 350: ...350 CHAPTER 16 CONFIGURING QUALITY OF SERVICE ...
Page 368: ...368 CHAPTER 17 CONFIGURING AND MANAGING SPANNING TREE PROTOCOL ...
Page 412: ...412 CHAPTER 19 CONFIGURING AND MANAGING SECURITY ACLS ...
Page 518: ...518 CHAPTER 21 CONFIGURING AAA FOR NETWORK USERS ...
Page 530: ...530 CHAPTER 22 CONFIGURING COMMUNICATION WITH RADIUS ...
Page 542: ...542 CHAPTER 23 MANAGING 802 1X ON THE WX SWITCH ...
Page 598: ...598 CHAPTER 26 ROGUE DETECTION AND COUNTERMEASURES ...
Page 706: ...706 GLOSSARY ...