Cisco Systems 6500, EA6500 Configuring a WRED-Drop and Tail-Drop Transmit Queue

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Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
78-14099-04
Chapter 31 Configuring PFC QoS
Configuring PFC QoS
Configuring a WRED-Drop and Tail-Drop Transmit Queue
1p3q1t ports have both WRED-drop and tail-drop thresholds in their transmit queues.
To configure the drop thresholds, perform this task:
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#
Step 3 Router(config-if)# wrr-queue random-detect
max-threshold queue_id thr1% [thr2%]
Configures the high WRED-drop thresholds.
Router(config-if)# no wrr-queue random-detect
max-threshold [queue_id]
Reverts to the default high WRED-drop thresholds.
Step 4 Router(config-if)# end Exits configuration mode.
Step 5 Router# show queueing interface type1 slot/port Verifies the configuration.
1. type = fastethernet, gigabitethernet, or tengigabitethernet
Command Purpose
Command Purpose
Step 1 Router(config)# interface type1 slot/port
1. type = fastethernet, gigabitethernet, or tengigabitethernet
Selects the interface to configure.
Step 2 Router(config-if)# wrr-queue threshold queue_id
thr1% [thr2% thr3% thr4% thr5% thr6% thr7% thr8%]
Configures the tail-drop thresholds.
Router(config-if)# no wrr-queue threshold
[queue_id]
Reverts to the default tail-drop thresholds.
Step 3 Router(config-if)# wrr-queue random-detect
min-threshold queue_id thr1% [thr2% thr3% thr4%
thr5% thr6% thr7% thr8%]
Configures the low WRED-drop thresholds.
Router(config-if)# no wrr-queue random-detect
min-threshold [queue_id]
Reverts to the default low WRED-drop thresholds.
Step 4 Router(config-if)# wrr-queue random-detect
max-threshold queue_id thr1% [thr2% thr3% thr4%
thr5% thr6% thr7% thr8%]
Configures the high WRED-drop thresholds.
Router(config-if)# no wrr-queue random-detect
max-threshold [queue_id]
Reverts to the default high WRED-drop thresholds.
Step 5 Router(config-if)# wrr-queue random-detect
queue_id
Enables WRED-drop thresholds .
Router(config-if)# no wrr-queue random-detect
[queue_id]
Enables tail-drop thresholds.
Step 6 Router(config-if)# end Exits configuration mode.
Step 7 Router# show queueing interface type1 slot/port Verifies the configuration.