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Client Quality of Service
Class Map
Cisco Small Business WAP121 and WAP321 Wireless-N Access Point with PoE 124
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Class Map
The Client QoS feature contains Differentiated Services (DiffServ) support that
allows traffic to be classified into streams and given a certain QoS treatment in
accordance with defined per-hop behaviors.
Standard IP-based networks are designed to provide best-effort data delivery
service. Best-effort service implies that the network delivers the data in a timely
fashion, although there is no guarantee that it will. During times of congestion,
packets may be delayed, sent sporadically, or dropped. For typical Internet
applications, such as email and file transfer, a slight degradation in service is
acceptable and in many cases unnoticeable. However, on applications with strict
timing requirements, such as voice or multimedia, any degradation of service has
undesirable effects.
A DiffServ configuration begins with defining class maps, which classify traffic
according to their IP protocol and other criteria. Each class map can then be
associated with a policy map, which defines how to handle the traffic class.
Classes that include time-sensitive traffic can be assigned to policy maps that
give precedence over other traffic.
You can use the Class Map page to define classes of traffic. Use the Policy Map
page to define policies and associate class maps to them.
Adding a Class Map
To add a class map:
STEP 1 Select Client QoS > Class Map in the navigation pane.
STEP 2 Enter a Class Map Name. The name can contain from 1 to 31 alphanumeric and
special characters. Spaces are not allowed.
STEP 3 Select a value from the Match Layer 3 Protocol list:
• IPv4—The class map applies only to IPv4 traffic on the WAP device.
• IPv6—The class map applies only to IPv6 traffic on the WAP device.
The Class Map page appears with additional fields, depending on the Layer 3
protocol selected: