CBWFQ Architecture

Supports multiple classes (depending on platform)

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Supports multiple classes (depending on platform)

All rights reserved

CBWFQ supports multiple class maps (the number depends upon the platform) to classify traffic into its corresponding FIFO queues. Tail drop is the default dropping scheme of CBWFQ. You can use weighted random early detection (WRED) in combination with CBWFQ to prevent congestion of a class.

The CBWFQ scheduler is used to guarantee bandwidth that is based on the configured weights.

Note Currently, except for the Cisco 7500 series router platform, all traffic classes (default traffic class excluded) only support FIFO queuing within the class. On all platforms, the default traffic class can support either FIFO or WFQ within the class. Check Cisco.com for the latest information on WFQ support within each traffic class.

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