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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 42 Configuring PFC QoS
Understanding How PFCQoS Works
Port-Based PFC QoS and VLAN-Based PFC QoS
You can configure each ingress LAN port for either physical port-based PFC QoS (default) or
VLAN-based PFC QoS and attach a policy map to the selected interface.
On ports configured for port-based PFC QoS, you can attach a policy map to the ingress LAN port as
follows:
• On a nontrunk ingress LAN port configured for port-based PFC QoS, all traffic received through the
port is subject to the policy map attached to the port.
• On a trunking ingress LAN port configured for port-based PFC QoS, traffic in all VLANs received
through the port is subject to the policy map attached to the port.
On a nontrunk ingress LAN port configured for VLAN-based PFC QoS, traffic received through the port
is subject to the policy map attached to the port’s VLAN.
On a trunking ingress LAN port configured for VLAN-based PFC QoS, traffic received through the port
is subject to the policy map attached to the traffic’s VLAN.
PFC QoS Egress Port Features
These sections describe PFC QoS egress port features:
• Flowchart of PFC QoS Egress LAN Port Features, page 42-13
• Egress CoS Values, page 42-13
• Egress DSCP Mutation with a PFC3, page 42-14
• Egress ToS Byte, page 42-14
• Egress PFC QoS Interfaces, page 42-14
• Egress ACL Support for Remarked DSCP, page 42-14
• Marking on Egress OSM Ports, page 42-15