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Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
78-14064-04
Chapter 32 Configuring PFC QoS
Configuring PFC QoS
When mapping CoS values to the strict-priority queues, note the following:
• The queue number is always 1.
• You can enter up to 8 CoS values to map to the queue.
This example shows how to map CoS value 7 to the strict-priority queues on Gigabit Ethernet port 1/1:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface gigabitethernet 1/1
Router(config-if)# priority-queue cos-map 1 7
Router(config-if)# end
Router#
This example shows how to verify the configuration:
Router# show queueing interface gigabitethernet 1/1
<...Output Truncated...>
Transmit queues [type = 1p2q2t]:
<...Output Truncated...>
queue thresh cos-map
---------------------------------------
1 1 0 1
1 2 2 3
2 1 4
2 2 6
3 1 5 7
Receive queues [type = 1p1q4t]:
<...Output Truncated...>
queue thresh cos-map
---------------------------------------
1 1 0 1
1 2 2 3
1 3 4
1 4 6
2 1 5 7
<...Output Truncated...>
Router#
Mapping CoS Values to Tail-Drop Thresholds on 1q4t/2q2t LAN Ports
Note Enter the show queueing interface {ethernet | fastethernet | gigabitethernet | tengigabitethernet}
slot/port | include type command to see the queue structure of a port.
On 1q4t/2q2t LAN ports, the receive- and transmit-queue tail-drop thresholds have this relationship:
• Receive queue 1 (standard) threshold 1 = transmit queue 1 (standard low priority) threshold 1
• Receive queue 1 (standard) threshold 2 = transmit queue 1 (standard low priority) threshold 2
• Receive queue 1 (standard) threshold 3 = transmit queue 2 (standard high priority) threshold 1
• Receive queue 1 (standard) threshold 4 = transmit queue 2 (standard high priority) threshold 2
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