Juniper JUNOSE 11.2.X BGP AND MPLS, Configuration Manual

Page: 349 / 742

Example Traffic Class Configuration for Differentiated Services
The commands in this example illustrate a partial network configuration that supports
four differentiated service classes on a particular tunnel: a best-effort class, two assured
forwarding classes, and an expedited forwarding class. Table 59 on page 313 presents
the mapping between EXP bits, PHB, PHB ID, and traffic class/color combination.
Table 59: Differentiated Services Mapping
Traffic
Class/Color
6-bit PHB ID PHB ID PHB EXP
best-effort/green 00 0x0000 BE 000
af1/green 10 0x2800 AF11 001
af1/yellow 12 0x3000 AF12 010
af1/red 14 0x3800 AF13 011
af2/green 18 0x4800 AF21 100
af2/yellow 20 0x5000 AF22 101
af2/red 22 0x5800 AF23 110
ef/green 46 0xb800 EF 111
NOTE: This example includes both MPLS and policy configuration commands, and
assumes that you are thoroughly familiar with the information and commands presented
in the JunosE Policy Management Configuration Guide.
The four traffic classes are configured to allocate fabric resources and allow global
synchronization of the three segments of the data path through an E Series router: ingress,
fabric, and egress. The JunosE Software automatically creates the best-effort traffic
class, with a default weight of eight. You must define the remaining three classes, af1,
af2, and ef. In this example, the af1 class has twice as much fabric bandwidth as the
best-effort class, and the af2 class has twice as much fabric bandwidth as the af1 class.
The expedited forwarding traffic (the ef class) requires strict-priority queuing.
host1(config)# traffic-class af1
host1(config-traffic-class)# fabric-weight 16
host1(config)# traffic-class af2
host1(config-traffic-class)# fabric-weight 32
host1(config)# traffic-class ef
host1(config-traffic-class)# fabric-strict-priority
Define two scheduler profiles for the af1 and af2 classes on the egress line modules:
host1(config)# scheduler-profile af1-scheduler-profile
313 Copyright © 2010, Juniper Networks, Inc.
Chapter 4: Configuring MPLS