Allied Telesis management software layer 2+ fast ethernet switches manual SET QOS Scheduling

Chapter 21: Class of Service (CoS) Commands

SET QOS SCHEDULING

Syntax

set qos scheduling=strictwrr weights=weights

Parameters
scheduling	Specifies the type of scheduling. The options are:
	strict	Strict priority. A port transmits all packets
		out of the higher priority queues before it
		transmits any from the low priority queues.
		This is the default.
	wrr	Weighted round robin. A port transmits a
		set number of packets from each queue in a
		round robin manner.
weights	Specifies the weight given to each of a port’s four
	egress priority queues. You must specify the weights if

scheduling will be weighted round robin. The range for each queue is 0 to 255 packets, and the default is 0. The weights are specified in the following order: Q0, Q1, Q2, Q3. For example, to give Q0 a weight of 1, Q1 a weight of 10, Q2 a weight of 20, and Q3 a weight of 30, you would enter this parameter as weights=1,10,20,30. The parameter must include all four queues.

Description

This command sets the QoS scheduling method and the weights for round robin scheduling. Scheduling and queue weights are set at the switch level. You cannot set this at a per-port basis.

Examples

The following command sets the scheduling to strict:

set qos scheduling=strict

The following command sets the scheduling to weighted round robin and gives egress priority queue Q0 a weight of 1, Q1 a weight of 5, Q2 a weight of 10, and Q3 a weight of 15:

set qos scheduling=wrr weights=1,5,10,15

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