Juniper JUNOS OS 10.3 - SOFTWARE, Manual

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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
Requirements
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).
Overview and Topology
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
3189 Copyright © 2010, Juniper Networks, Inc.
Chapter 108: Examples: CoS Configuration