340
C
HAPTER
16: C
ONFIGURING
Q
UALITY
OF
S
ERVICE
In this example, the MAP places the packet in the Voice forwarding
queue. The Voice queue has statistically more access to the air than
the other queues, so the user’s voice traffic receives priority treatment.
SVP QoS Mode
The SVP QoS mode optimizes forwarding of SVP traffic by setting the
random wait time a MAP radio waits before transmitting the traffic to 0
microseconds.
Normally, a MAP radio waits an additional number of microseconds
following the fixed wait time, before forwarding a queued packet or
frame. Each forwarding queue has a different range of possible random
wait times. The Voice queue has the narrowest range, whereas the
Background and Best Effort queues have the widest range. The random
wait times ensure that the Voice queue gets statistically more access to
the air than the other queues.
By setting the random wait time to 0 for SVP, the SVP QoS mode provides SVP
traffic the greatest possible access to the air, on a statistical basis. The QoS
mode affects forwarding of SVP traffic only. The random wait times for other
types of traffic are the same as those used when the QoS mode is WMM.
Call Admission
Control
Call Admission Control (CAC) is an optional feature that helps ensure that
high-priority clients have adequate bandwidth, by limiting the number of
active sessions MAP radios can have for an SSID. For example, you can
limit the number of active sessions on a VoIP SSID to ensure that each call
receives the bandwidth required for quality voice service.
You can use CAC with either QoS mode (WMM or SVP).
CAC is disabled by default. You can enable session-based CAC on a
service-profile basis. When enabled, CAC limits the number of active
sessions a radio can have to 14 by default. You can change the maximum
number of sessions to a value from 0 to 100.
CAC is configured on a service profile basis and limits association to
radios only for the service profile’s SSID. Association to the radios by
clients on other SSIDs is not limited. To ensure voice quality, do not map
other service profiles to the radio profile you plan to use for voice traffic.
(To configure CAC, see “Configuring Call Admission Control” on
page 343.)
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 ...