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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 42 Configuring PFC QoS
Configuring PFC QoS
To configure the CoS value for an ingress LAN port, perform this task:
This example shows how to configure the CoS value 5 on Fast Ethernet port 5/24 and verify the
configuration:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface fastethernet 5/24
Router(config-if)# mls qos cos 5
Router(config-if)# end
Router# show queueing interface fastethernet 5/24 | include Default COS
Default COS is 5
Router#
Configuring Standard-Queue Drop Threshold Percentages
These sections describe configuring standard-queue drop threshold percentages:
• Configuring a Tail-Drop Receive Queue, page 42-93
• Configuring a WRED-Drop Transmit Queue, page 42-94
• Configuring a WRED-Drop and Tail-Drop Receive Queue, page 42-94
• Configuring a WRED-Drop and Tail-Drop Transmit Queue, page 42-95
• Configuring 1q4t/2q2t Tail-Drop Threshold Percentages, page 42-96
Note • Enter the show queueing interface {ethernet | fastethernet | gigabitethernet |
tengigabitethernet} slot/port | include type command to see the queue structure of a port.
• 1p1q0t ports have no configurable thresholds.
• 1p3q1t (transmit), 1p2q1t (transmit), and 1p1q8t (receive) ports also have nonconfigurable
tail-drop thresholds.
When configuring thresholds, note the following information:
• Queue number 1 is the lowest-priority standard queue.
• Higher-numbered queues are higher priority standard queues.
Command Purpose
Step 1
Router(config)# interface {{type
1
slot/port} |
{port-channel number}}
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
Selects the interface to configure.
Step 2
Router(config-if)# mls qos cos port_cos
Configures the ingress LAN port CoS value.
Router(config-if)# no mls qos cos port_cos
Reverts to the default port CoS value.
Step 3
Router(config-if)# end
Exits configuration mode.
Step 4
Router# show queuing interface {ethernet |
fastethernet | gigabitethernet} slot/port
Verifies the configuration.