Cisco 7604 Configuration Manual page 616

Ios software configuration guide

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Understanding How PFC QoS Works

Flowchart of PFC QoS Egress LAN Port Features

Figure 41-7 Egress LAN Port Scheduling, Congestion Avoidance, and Marking

Egress CoS Values

For all egress traffic, PFC QoS uses a configurable map to derive a CoS value from the final

for use in classification and congestion avoidance and to be written into ISL and 802.1Q frames.

With Release 12.2(18)SXF5 and later releases, you can configure WS-X6708-10GE ports to use the final

internal DSCP value for egress LAN port classification and congestion avoidance (see the

DSCP-Based Queue Mapping" section on page

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

shows how traffic flows through the QoS features on egress LAN ports.

Egress queues and

drop thresholds

value associated with the traffic. PFC QoS sends the derived CoS value to the egress LAN ports

Configuring PFC QoS

"Configuring

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