Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual page 710

Understanding How QoS Works
Figure 41-2 Ethernet ingress Port Classification, Marking, Scheduling, and Congestion Avoidance
Port set to
untrusted?
No
802.1Q?
Yes
Port set to
trust-ipprec?
No
Port set to
trust-dscp?
No
Port is set to
trust-cos
(Default values
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
41-4
Frame
enters
switch
Yes
Apply
port
CoS
Apply
No
ISL or
port
CoS
Yes
Yes
1q4t port
(tail-drop thresholds)
100% for CoS 6 and 7
80% for CoS 4 and 5
60% for CoS 2 and 3
50% for CoS 0 and 1
1p1q4t
(tail-drop thresholds)
Strict pr iority queue
100% for CoS 5
shown) Standard queue
100% for CoS 6 and 7
80% for CoS 4
60% for CoS 2 and 3
50% for CoS 0 and 1
(tail-drop thresholds)
Strict priority queue
100% for CoS 5
Standard queue
100% for CoS 0, 1, 2, 3, 4, 6, 7
Ethernet ingress port classification, marking,
scheduling, and congestion avoidance
1p1q0t port
Chapter 41 Configuring QoS
To
switching engine
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