Configuring The Transmit-Queue Size Ratio - Cisco 7604 Configuration Manual

Configuring PFC QoS

Configuring the Transmit-Queue Size Ratio

To configure the transmit-queue size ratio, perform this task:
Command
Step 1
Router(config)# interface type
Step 2
Router(config-if)# wrr-queue queue-limit
low_priority_queue_weight
[ intermediate_priority_queue_weights ]
high_priority_queue_weight
Step 3
Router(config-if)# priority-queue queue-limit
strict_priority_queue_weight
Step 4
Router(config-if)# end
Step 5
Router# show queueing interface type
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
When configuring the transmit-queue size ratio between transmit queues, note the following
information:
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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
41-112
1
slot/port
1
slot/port
The wrr-queue queue-limit command is not supported on 1p3q1t ports.
For ports that have an egress strict priority queue:
With Release 12.2(18)SXF2 and later releases, you can enter the priority-queue queue-limit
–
interface command to set the size of the egress strict priority queue on these switching modules:
—WS-X6502-10GE (1p2q1t)
—WS-X6148A-GE-TX (1p3q8t)
—WS-X6148-RJ-45 (1p3q8t)
—WS-X6148-FE-SFP (1p3q8t)
—WS-X6748-SFP (1p3q8t)
—WS-X6724-SFP (1p3q8t)
—WS-X6748-GE-TX (1p3q8t)
—WS-X6704-10GE (1p7q4t)
—WS-SUP32-10GE-3B (1p3q8t)
—WS-SUP32-GE-3B (1p3q8t)
—WS-X6708-10GE (1p7q4t)
With releases earlier than Release 12.2(18)SXF2 and for other modules, PFC QoS sets the
–
egress strict-priority queue size equal to the high-priority queue size.
Estimate the mix of low priority-to-high priority traffic on your network (for example, 80 percent
low-priority traffic and 20 percent high-priority traffic).
Use the estimated percentages as queue weights.
You must enter weights for all the standard transmit queues on the interface (2, 3, or 7 weights).
Valid values are from 1 to 100 percent, except on 1p2q1t egress LAN ports, where valid values for
the high priority queue are from 5 to 100 percent.
Purpose
Selects the interface to configure.
Configures the queue size ratio between transmit queues.
Configures the strict priority queue size.
Not supported on all switching
Note
Exits configuration mode.
Verifies the configuration.
Chapter 41 Configuring PFC QoS
modules.
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