Blade ICE G8000 manual Queuing and Scheduling, 802.1p configuration example

RackSwitch G8000 Application Guide

802.1p configuration example

1.Configure a port’s default 802.1p priority value to 2.

RS G8000 (config)# interface port 1

RS G8000 (config-if)# dot1p 2

RS G8000 (config-if)# exit

2.Map the 802.1p priority value to a COS queue and set the COS queue scheduling weight.

RS G8000 (config)# qos transmit-queue mapping 1 0

RS G8000 (config)# qos transmit-queue weight-cos 10

Queuing and Scheduling

The G8000 has up to eight output Class of Service (COS) queues per port, into which each packet is placed. Each packet’s 802.1p priority determines its COS queue.

Each COS queue uses Weighted Round Robin (WRR) scheduling, with user configurable weight from 1 to 15. The weight of 0 (zero) indicates strict priority, which might starve the low priority queues.

You can configure the following attributes for COS queues:

„Map 802.1p priority value to a COS queue, as follows:

RS G8000 (config)# qos transmit-queue mapping <802.1p priority value (0-7)> <COS queue (0-7)>

„Define the number of COS queues, as follows:

RS G8000 (config)# qos transmit-queue number-cos <1-8>

„Define the scheduling weight of each COS queue, as follows:

RS G8000 (config)# qos transmit-queueweight-cos<COS queue (0-7)> <scheduling weight (0-15)>

112 „ Chapter 6: Quality of Service BMD00041, November 2008