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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 41 Configuring PFC QoS
PFC QoS Default Configuration
8q8t Receive Queues
2q2t Transmit Queues
Feature Default Value
Standard receive queue 1
(lowest priority)
Threshold 1 CoS 0 and 1
Tail-drop Disabled; 70%
WRED-drop Enabled; 40% low, 70% high
Threshold 2 CoS 2 and 3
Tail-drop Disabled; 80%
WRED-drop Enabled; 40% low, 80% high
Threshold 3 CoS 4
Tail-drop Disabled; 90%
WRED-drop Enabled; 50% low, 90% high
Threshold 4 CoS 6 and 7
Tail-drop Disabled; 100%
WRED-drop Enabled; 50% low, 100% high
Thresholds 5–8 CoS None
Tail-drop Disabled; 100%
WRED-drop Enabled; 50% low, 100% high
Standard receive queues 2–7
(intermediate priorities)
Thresholds 1–8 CoS None
Tail-drop Enabled; 100%
WRED-drop Disabled; 100% low, 100% high
Standard receive queue 8
(highest priority)
Threshold 1 CoS 5
Tail-drop Enabled; 100%
WRED-drop Disabled; 100% low, 100% high
Thresholds 2–8 CoS None
Tail-drop Enabled; 100%
WRED-drop Disabled; 100% low, 100% high
Feature Default Value
Standard transmit queue 1
(low priority)
Threshold 1 CoS 0 and 1
Tail-drop 80%
WRED-drop Not supported
Threshold 2 CoS 2 and 3
Tail-drop 100%
WRED-drop Not supported
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