Cisco 6500 Series Software Configuration Manual page 398

Understanding How PFC QoS Works
Figure 31-4 PFC Classification, Marking, and Policing
Received
Layer 3
ToS byte
Received
Layer 2
CoS
Untrusted Ingress LAN Port
Received
Layer 3
ToS byte
Received
Layer 2
CoS
No received Layer 2
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
31-8
Trusted Ingress
LAN Port
Layer 2
CoS drop
thresholds
Always apply
Layer 2 CoS
Ingress
OSM Port
Received
Layer 3
ToS byte
QoS labels
PFC QoS Features
Trust CoS
Policer
DSCP DSCP
Marker
Map Map
CoS
CoS*
Trust DSCP
Policer
DSCP DSCP
Marker
Map
CoS*
Trust IP Precedence
IP
Precedence
Policer
DSCP
Marker
Map
Untrusted
(Only From Untrusted Port)
Policer
DSCP
Marker
Map
CoS*
*LAN ports only
Chapter 31 Configuring PFC QoS
Egress Interface
Write
Layer 3
ToS byte
Write
Layer 2
CoS*
DSCP
Map
CoS*
Layer 2
CoS drop
thresholds*
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