Cisco 7604 User Manual

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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 41 Configuring PFC QoS
Configuring PFC QoS
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
To map CoS values to tail-drop thresholds, perform this task:
When mapping CoS values to a tail-drop threshold, note the following information:
• Use the transmit queue and threshold numbers.
• Queue 1 is the low-priority standard transmit queue.
• Queue 2 is the high-priority standard transmit queue.
• There are two thresholds in each queue.
• Enter up to 8 CoS values to map to the threshold.
This example shows how to map the CoS values 0 and 1 to standard transmit queue 1/threshold 1 for Fast
Ethernet port 5/36:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface fastethernet 5/36
Router(config-if)# wrr-queue cos-map 1 1 0 1
Router(config-if)# end
Router#
This example shows how to verify the configuration:
Router# show queueing interface fastethernet 5/36 | begin queue thresh cos-map
queue thresh cos-map
---------------------------------------
1 1 0 1
1 2 2 3
2 1 4 5
2 2 6 7
<...Output Truncated...>
Router#
Command Purpose
Step 1
Router(config)# interface type
1
slot/port
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
Selects the interface to configure.
Step 2
Router(config-if)# wrr-queue cos-map
transmit_queue_# threshold_# cos1 [
cos2 [ cos3
[
cos4 [ cos5 [ cos6 [ cos7 [ cos8 ]]]]]]]
Maps CoS values to a tail-drop threshold.
Step 3
Router(config-if)# no wrr-queue cos-map
Reverts to the default mapping.
Step 4
Router(config-if)# end
Exits configuration mode.
Step 5
Router# show queueing interface type
1
slot/port
Verifies the configuration.

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English