Defining CoS Forwarding Classes (CLI Procedure)Forwarding classes allow you to group packets for transmission. Based on forwardingclasses, you assign packets to output queues.By default, four categories of forwarding classes are defined: best effort, assuredforwarding, expedited forwarding, and network control. J-EX Series switches support upto 16 forwarding classes.You can configure forwarding classes in one of the following ways:• Using class statement—You can configure up to 16 forwarding classes and you canmap multiple forwarding classes to single queue.• Using queue statement—You can configure up to 8 forwarding classes and you canmap one forwarding class to one queue.This example uses the class statement to configure forwarding classes.To configure CoS forwarding classes, map the forwarding classes to queues:[edit class-of-service forwarding-classes]user@switch# set class be queue—num 0user@switch# set class ef queue—num 1user@switch# set class af queue—num 2user@switch# set class nc queue—num 3user@switch# set class ef1 queue—num 4user@switch# set class ef2 queue—num 5user@switch# set class af1 queue—num 6user@switch# set class nc1 queue—num 7RelatedDocumentationDefining CoS Forwarding Classes (J-Web Procedure) on page 2918•• Example: Configuring CoS on J-EX Series Switches on page 2883• Assigning CoS Components to Interfaces (CLI Procedure) on page 2928• Monitoring CoS Forwarding Classes on page 2936• Understanding CoS Forwarding Classes on page 2870Defining CoS Forwarding Classes (J-Web Procedure)You can define CoS forwarding classes on a J-EX Series switch using the J-Web interface.Assigning a forwarding class to a queue number affects the scheduling and marking ofa packet as it transits a switch.To define forwarding classes:1. Select Configure > Class of Service > Forwarding Classes.2918Dell PowerConnect J-Series Ethernet Switch Complete Software Guide for Junos OS
