Cisco 7604 User Manual

41-8
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 41 Configuring PFC QoS
Understanding How PFC QoS Works
Flowchart of Ingress LAN Port PFC QoS Features
Figure 41-5 shows how traffic flows through the ingress LAN port PFC QoS features.
Figure 41-5 Ingress LAN Port PFC QoS Features
Note • Ingress CoS mutation is supported only on 802.1Q tunnel ports.
• Release 12.2(18)SXF5 and later releases support the ignore port trust feature.
• DSCP-based queue mapping is supported only on WS-X6708-10GE ports.
154684
Ye s
Frame
enters
switch
Port set to
untrusted?
ISL or
802.1Q?
No
No
No
Port set to
trust-ipprec?
Port set to
trust-dscp?
Ingress
CoS
Mutation?
IP
traffic with
recognizable
ToS byte?
IP
traffic with
recognizable
ToS byte?
Ignore
port trust
enabled?
DSCP-based
queue mapping
enabled?
No
No
No
No
No
No
Port is set to
trust-cos
To
PFC
Apply
port
CoS
Apply
port
CoS
Ye s Ye s Ye s
Ye s
Ye s
Mutate
CoS
Ingress queues and
drop thresholds
DSCP-to-queue
map
CoS-to-queue
map
Yes
Yes

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English