Chapter 42 Configuring PFC QoS

Configuring PFC QoS

When mapping DSCP values to the strict-priority queue, note the following information:

•The queue number is always 1.

•You can enter up to 8 DSCP values to map to the queue.

•You can enter multiple commands to map additional DSCP values to the queue.

This example shows how to map DSCP value 7 to the strict-priority queue on 10 Gigabit Ethernet port 6/1:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# interface tengigabitethernet 6/1

Router(config-if)#priority-queue dscp-map 1 7

Router(config-if)# end

 

 

Router#

 

 

 

 

 

 

 

Note

The strict priority queue is queue 8 in the output of the show queueing interface command.

 

 

 

 

 

This example shows how to verify the configuration:

 

 

 

Router# show queueing interface tengigabitethernet 6/1 begin queue thresh dscp-map

 

 

 

queue thresh dscp-map

 

 

 

---------------------------------------

 

 

<

...Output Truncated...

>

 

 

 

8

1

7

40

46

 

 

<

...Output Truncated...

>

 

 

Router#

 

 

 

 

Configuring CoS-Based Queue Mapping

These sections describe how to configure CoS-based queue mapping:

•Mapping CoS Values to Standard Receive-Queue Thresholds, page 42-104

•Mapping CoS Values to Standard Transmit-Queue Thresholds, page 42-105

•Mapping CoS Values to Strict-Priority Queues, page 42-106

•Mapping CoS Values to Tail-Drop Thresholds on 1q4t/2q2t LAN Ports, page 42-107

Mapping CoS Values to Standard Receive-Queue Thresholds

To map CoS values to the standard receive-queue thresholds, perform this task:

 

Command

 

Purpose

Step 1

 

 

Router(config)# interface type1 slot/port

Selects the interface to configure.

Step 2

 

 

 

Router(config-if)#

rcv-queue cos-map queue_#

Maps CoS values to the standard receive queue

 

threshold_# cos1 [cos2 [cos3 [cos4 [cos5 [cos6

thresholds.

 

[cos7 [cos8]]]]]]]

 

 

 

Router(config-if)#

no rcv-queue cos-map

Reverts to the default mapping.

Step 3

 

 

 

Router(config-if)#

end

Exits configuration mode.

Step 4

 

 

Router# show queueing interface type1 slot/port

Verifies the configuration.

 

 

 

 

1.type = fastethernet, gigabitethernet, or tengigabitethernet

 

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

42-104

OL-4266-08

Page 103 Page 105
Page 104
Image 104
Cisco Systems OL-4266-08 Configuring CoS-Based Queue Mapping, Mapping CoS Values to Standard Receive-Queue Thresholds
Page 103 Page 105

OL-4266-08 specifications

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