Enables WFQ

© 2004 Cisco Systems, Inc. All rights reserved. bcran v2.1—10-6

The fair-queue command enables WFQ on an interface.

fair-queue Command

Command

Description

congestive -discard-threshold

The number of messages creating a congestion threshold after which messages for high-volume traffic will no longer be queued. It is the maximum number of packets in a conversation held in a queue before they are discarded. Valid values are 1 to 512, inclusive. The default is 64 messages. The fair-queue 128 command sets the congestive-discard-threshold to 128.

congestive-discard-threshold is an optional command. It is not required, as indicated by the braces {} in the figure.

The congestive discard policy applies only to high-volume conversations that have more than one message in the queue. The discard policy tries to control conversations that would monopolize the link. If an individual conversation queue contains more messages than the congestive discard threshold, that conversation will not have any new messages queued until the content of that queue drops below one-fourth of the congestive discard value.

Note WFQ is used by default on serial interfaces at E1 speeds (2.048 Mbps) and below. WFQ is disabled on serial interfaces using X.25 or compressed PPP. LAN interfaces and serial lines operating at E3 or T3 speeds do not support WFQ.

This topic describes WFQ being used on a Frame Relay network to enable interactive traffic to flow during times of congestion.

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