Cisco WS-C6506 - Configuring the Standard Receive-Queue Tail-Drop Thresholds; Configuring the 2 Q2 T Port Standard Transmit-Queue Tail-Drop Thresholds

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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 enable microflow policing of the traffic in VLANs 1–20:
Console> (enable) set qos bridged-microflow-policing enable 1-20
QoS microflow policing is enabled for bridged packets on vlans 1-20.
Console> (enable)
Configuring the Standard Receive-Queue Tail-Drop Thresholds
To configure the standard receive-queue tail-drop thresholds on the switch, perform this task in
privileged mode:
For more information, see the “Receive Queues” section on page 52-13.
QoS maintains separate configurations for the 1q2t, 1q4t, and 1p1q4t ports. This command configures
the standard queue. Specify queue 1 (the threshold in the strict-priority queue, when present, is not
separately configurable; it uses threshold 4 as specified for queue 1).
The thresholds are all specified as percentages ranging from 1–100. A value of 10 indicates a threshold
when the buffer is 10 percent full.
This example shows how to configure the standard receive-queue tail-drop thresholds:
Console> (enable) set qos drop-threshold 1q4t rx queue 1 20 40 75 100
Receive drop thresholds for queue 1 set at 20% 40% 75% 100%
Console> (enable)
Note You cannot configure a drop threshold in a 1p1q0t receive queue.
Configuring the 2q2t Port Standard Transmit-Queue Tail-Drop Thresholds
To configure the standard transmit-queue tail-drop thresholds on all 2q2t ports, perform this task in
privileged mode:
Queue number 1 is the low-priority transmit queue, and queue number 2 is high priority. In each queue,
the low-priority threshold number is 1 and the high-priority threshold number is 2.
The thresholds are all specified as percentages ranging from 1–100. A value of 10 indicates a threshold
when the buffer is 10 percent full.
Task Command
Configure the standard receive-queue tail-drop
thresholds.
set qos drop-threshold port_type rx queue 1 thr1
thr2 thr3 thr4
Task Command
Configure the standard transmit-queue tail-drop
thresholds on all 2q2t ports.
set qos drop-threshold port_type tx queue q#
thr1 thr2