Enterprise to Service Provider QoS Class Mapping Example

Application

Application

SP Service Classes

EF

Controlled

Latency

CS5

Controlled Load 1

CS3 43%

CS6 AF31

Controlled Load 1

CS3 43%

Scavenger

CS1

Best Effort

0

I-►

AF21 Controlled Load 2 15%

Best Effort 7%

The figure illustrates how the different enterprise traffic classes can be mapped into the four traffic classes offered by a service provider. In the example, there is no streaming video traffic. The following four traffic classes are offered by the service provider:

■ Controlled Latency: A traffic class for all real-time traffic. The controlled latency class admits packets marked with CS5 and Expedited Forwarding (EF).

■ Controlled Load 1: A traffic class for all highly bursty traffic. The controlled load 1 class admits packets marked with CS3, AF31, and CS6.

■ Controlled Load 2: A traffic class for the less bursty traffic. The controlled load 2 class admits packets marked with AF21.

■ Best Effort: A traffic class for the best-effort traffic. All other traffic is assigned to the best-effort class.

The figure also shows an example of bandwidth allocation between the four traffic classes where 35 percent of the link bandwidth is allocated for the controlled latency traffic class, 43 percent for controlled load 1 traffic class, 15 percent for controlled load 2 traffic class, and 7 percent for best-effort traffic class.

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