addresses. Other factors such as source and destination MAC addresses, source and destination
port or socket numbers, data-link connection identifier (DLCI) in Frame Relay deployments,
Quality of Service (QoS) values, and Type of Service (ToS) values also provide discriminatory
criteria to the WFQ process. Figure 10-4 illustrates the WFQ concept.
constitute a higher volume of traffic. With WFQ, the low-volume traffic is given the priority on
the outbound interface. Therefore, the number 3 packet is given dispatch priority.
conversations from overwhelming the circuit, you can configure the maximum number of
records that any high-volume conversation allows into the queue. The default setting is 64
records (packets), but the supported range is from 14096. If a conversation reaches the queue
limit, no further records are queued for that conversation until the percentage of the entries in
the queue for that conversation drops. Essentially, all new packets for the over-queue-limit
conversation are dropped and lost.
an acknowledgement. A larger window size enables a higher transmission threshold.
Conversations using TCP that suffer a packet drop retransmit automatically as part of the Layer
4 flow control process. As a consequence, the communicating parties in the TCP conversation
are forced to reduce their window sizes.
discard threshold parameter. The command to configure WFQ is as follows:
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