Juniper JUNOS OS 10.3 - SOFTWARE Manual page 3285

Requirements
Overview and Topology
Copyright © 2010, Juniper Networks, Inc.
MPLS services are often used to ensure better performance for low-latency applications
such as VoIP and other business-critical functions. These applications place specific
demands on a network for successful transmission. CoS gives you the ability to control
the mix of bandwidth, delay, jitter, and packet loss while taking advantage of the MPLS
labeling mechanism.
This example shows how to configure CoS on an MPLS network that is using a
unidirectional circuit cross-connect (CCC) from the ingress provider edge (PE) switch to
the egress PE switch. for the customer-edge interface of the ingress provider edge (PE)
switch. It describes adding the configuration of CoS components to the ingress PE switch,
the egress PE switch, and the core provider switches of the existing MPLS network.
Because of the unidirectional configuration, the DSCP classifier needs to be configured
only on the ingress PE switch.
Requirements on page 3189
Overview and Topology on page 3189
Configuring the Local PE Switch on page 3191
Configuring the Remote PE Switch on page 3193
Configuring the Provider Switch on page 3194
Verification on page 3195
This example uses the following hardware and software components:
Junos OS Release 10.1 or later for EX Series switches
Three EX Series switches
Before you configure CoS with MPLS, be sure you have:
Configured an MPLS network with two PE switches and one provider switch. See
"Example: Configuring MPLS on EX Series Switches" on page 3365. This example assumes
that an MPLS network has been configured using a cross circuit-connect (CCC).
This example describes adding custom classifiers and custom rewrite rules to switches
in an MPLS network that is using MPLS over CCC.
It is a unidirectional configuration. Therefore, you need to configure custom classifiers
and custom rewrite rules as follows:
On the ingress PE switch: custom DSCP classifier and custom EXP rewrite rule
On the egress PE switch: custom EXP classifier
On the provider switch: customer EXP classifier and custom EXP rewrite rule
Chapter 108: Examples: CoS Configuration
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