Cisco 7604 User Manual

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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 41 Configuring PFC QoS
Configuring PFC QoS
Setting the Receive-Queue Size Ratio
You can set the size ratio between the standard receive queues on 2q8t, 8q4t, and 8q8t ports and between
the strict-priority and standard receive queues on 1p1q0t or 1p1q8t ports.
To set the size ratio between the receive queues, perform this task:
When setting the receive-queue size ratio, note the following information:
• The rcv-queue queue-limit command configures ports on a per-ASIC basis.
• Estimate the mix of differing priority traffic on your network (for example, 80 percent standard
traffic and 20 percent strict-priority traffic).
• Use the estimated percentages as queue weights.
• Valid values are from 1 to 100 percent, except on 1p1q8t ports, where valid values for the strict
priority queue are from 3 to 100 percent.
This example shows how to set the receive-queue size ratio for Fast Ethernet port 2/2:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface fastethernet 2/2
Router(config-if)# rcv-queue queue-limit 75 15
Router(config-if)# end
Router#
This example shows how to verify the configuration:
Router# show queueing interface fastethernet 2/2 | include queue-limit
queue-limit ratios: 75[queue 1] 15[queue 2]
Router#
Command Purpose
Step 1
Router(config)# interface {fastethernet |
tengigabitethernet}
slot/port
Selects the interface to configure.
Step 2
Router(config-if)# rcv-queue queue-limit
low_priority_queue_weight
[
intermediate_priority_queue_weights ]
high_priority_queue_weight
Or:
Router(config-if)# rcv-queue queue-limit
standard_queue_weight
strict_priority_queue_weight
Sets the size ratio between the receive queues.
Router(config-if)# no rcv-queue queue-limit
Reverts to the default size ratio.
Step 3
Router(config-if)# end
Exits configuration mode.
Step 4
Router# show queueing interface {fastethernet |
tengigabitethernet}
slot/port
Verifies the configuration.

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English