42-96

Chapter 42 Configuring PFC QoS

Configuring PFC QoS

	Command	Purpose
Step 4
Step 4	Router(config-if)#wrr-queue random-detect	Configures the high WRED-drop thresholds.
	max-thresholdqueue_id thr1% [thr2% thr3% thr4%
	thr5% thr6% thr7% thr8%]
	Router(config-if)#no wrr-queue random-detect	Reverts to the default high WRED-drop thresholds.
	max-threshold [queue_id]
Step 5
Step 5	Router(config-if)#wrr-queue random-detect	Enables WRED-drop thresholds.
	queue_id
	Router(config-if)#no wrr-queue random-detect	Enables tail-drop thresholds.
	[queue_id]
Step 6
Step 6	Router(config-if)# end	Exits configuration mode.
Step 7
Step 7	Router# show queueing interface type1 slot/port	Verifies the configuration.

1.type = fastethernet, gigabitethernet, or tengigabitethernet

This example shows how to configure the low-priority transmit queue high-WRED-drop thresholds for 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)#wrr-queue random-detect max-threshold 1 70 70

Router(config-if)# end

Router#
This example shows how to verify the configuration:
Router# show queueing interface gigabitethernet 1/1 begin Transmit queues
Transmit queues [type = 1p2q2t]:
Queue Id	Scheduling	Num of thresholds
-----------------------------------------
1	WRR low	2
2	WRR high	2
3	Priority	1
queue random-detect-max-thresholds
----------------------------------

140[1] 70[2]

240[1] 70[2]

<...Output Truncated...>

Router#

Configuring 1q4t/2q2t Tail-Drop Threshold Percentages

On 1q4t/2q2t ports, the receive- and transmit-queue 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

	Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
42-96	OL-4266-08

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Cisco Systems OL-4266-08 manual Configuring 1q4t/2q2t Tail-Drop Threshold Percentages, 42-96

Models: OL-4266-08

Command

This example shows how to verify the configuration:

Configuring 1q4t/2q2t Tail-Drop Threshold Percentages

OL-4266-08 specifications