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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 52 Configuring QoS
Configuring QoS on the Switch
This example shows how to configure the low-priority transmit-queue tail-drop thresholds:
Console> (enable) set qos drop-threshold 2q2t tx queue 1 40 100
Transmit drop thresholds for queue 1 set at 40% 100%
Console> (enable)
Note You cannot configure the tail-drop thresholds in 1p3q1t transmit queues.
Configuring the Standard Queue WRED-Drop Thresholds
The 1p1q8t ports have weighted random early detection (WRED)-drop thresholds in their standard
receive queue.
The 1p2q2t, 1p3q1t, 1p2q1t, 1p3q8t, and 1p7q8t ports have WRED-drop thresholds in their standard
transmit queues.
Note The 1p7q8t (transmit), 1p3q1t (transmit), 1p2q1t (transmit), and 1p1q8t (receive) ports also have
nonconfigurable tail-drop thresholds.
To configure the standard queue WRED-drop thresholds on all ports of each type, perform this task in
privileged mode:
When configuring the 1p1q8t ports, note the following:
• Queue 1 is the single standard receive queue.
• When you configure the single standard receive queue, note the following:
–
The first percentage that you enter sets the lowest-priority threshold.
–
The second percentage that you enter sets the next highest-priority threshold.
–
The eighth percentage that you enter sets the highest-priority threshold.
Task Command
Configure the standard queue WRED-drop
thresholds on all ports of a given type.
set qos wred 1p1q8t rx queue q# [thr1Lo:]thr1Hi
[thr2Lo:]thr2Hi [thr_n_Lo:]thr_n_Hi...
[thr8Lo:]thr8Hi
set qos wred 1p7q8t tx queue q# [thr1Lo:]thr1Hi
[thr2Lo:]thr2Hi [thr_n_Lo:]thr_n_Hi...
[thr8Lo:]thr8Hi
set qos wred 1p3q8t tx queue q# [thr1Lo:]thr1Hi
[thr2Lo:]thr2Hi [thr_n_Lo:]thr_n_Hi...
[thr8Lo:]thr8Hi
set qos wred 1p2q2t tx queue q# [thr1Lo:]thr1Hi
[thr2Lo:]thr2Hi
set qos wred 1p3q1t tx queue q# [thr1Lo
:]thr1Hi
set qos wred 1p2q1t tx queue q# [thr1Lo:]thr1Hi
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