Configuring Class Of Service; Configuring Cos Classifiers (Nsm Procedure) - Juniper NETWORK AND SECURITY MANAGER - NSM CONFIGURATION GUIDE FOR EX SERIES DEVICES REV 3 Configuration Manual

CHAPTER 3

Configuring Class of Service

Configuring CoS Classifiers (NSM Procedure)

Copyright © 2010, Juniper Networks, Inc.
This section contains the following:
Configuring CoS Classifiers (NSM Procedure) on page 15
Configuring CoS Code Point Aliases (NSM Procedure) on page 17
Configuring CoS Drop Profile (NSM Procedure) on page 19
Configuring CoS Forwarding Classes (NSM Procedure) on page 21
Configuring CoS Interfaces (NSM Procedure) on page 22
Configuring CoS Rewrite Rules (NSM Procedure) on page 28
Configuring CoS Schedulers (NSM Procedure) on page 31
Configuring CoS and Applying Scheduler Maps (NSM Procedure) on page 32
Packet classification associates incoming packets with a particular class-of-service
(Cos) servicing level. Classifiers associate packets with a forwarding class and loss priority
and, based on the associated forwarding class, assign packets to output queues. JUNOS
software supports two general types of classifiers:
Behavior aggregate or CoS value traffic classifiers—Examines the CoS value in the
packet header. The value in this single field determines the CoS settings applied to the
packet. BA classifiers allow you to set the forwarding class and loss priority of a packet
based on the Differentiated Services code point (DSCP) value, IP precedence value,
and IEEE 802.1p value. The default classifier is based on the DSCP value.
Multifield traffic classifiers—Examines multiple fields in the packet such as source and
destination addresses and source and destination port numbers of the packet. With
multifield classifiers, you set the forwarding class and loss priority of a packet based
on firewall filter rules.
To configure and apply behavior aggregate classifiers for the switch:
In the navigation tree, select Device Manager > Devices.
1.
Click the Device Tree tab, and then double-click the device for which you want to
2.
configure and apply behavior aggregate classifiers.
Click the Configuration tab. In the configuration tree expand Class of Service.
3.
15