Cisco 7609 User Manual

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Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
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Chapter 32 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 type
1
slot/port
Verifies the configuration.
1. type = fastethernet, gigabitethernet, or tengigabitethernet
Command Purpose
Command Purpose
Step 1
Router(config)# interface type
1
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 type
1
slot/port
Verifies the configuration.

Cisco 7609 Specifications

General

Chassis Slots	9
Switch Fabric Capacity	720 Gbps
Power Supply Options	AC or DC
Product Type	Router
Form Factor	Rack-mountable
Supported Line Cards	Various Cisco 7600 Series line cards
Operating System	Cisco IOS
Management	CLI, SNMP
Forwarding Performance	400 Mpps
Maximum Power Consumption	4000 Watts
Redundancy	Yes
Interfaces/Ports	Various, depending on line cards installed