Schedulers; Policer - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Complete Software Guide for Junos

Policer

Schedulers

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Documentation
3396
®
OS for EX Series Ethernet Switches, Release 10.4
Only one EXP rewrite rule (either default or custom) is supported on a switch. The switch
applies it to all the MPLS-enabled egress interfaces.
Policing helps to ensure that the amount of traffic forwarded through an LSP never
exceeds the requested bandwidth allocation. During periods of congestion (when the
total rate of queuing packets exceeds the rate of transmission), any new packets being
sent to an interface can be dropped because there is no place to store them. You should
configure a policer on the ingress PE switch:
If you are using MPLS with CCC, you bind the policer to the LSP. You cannot bind a
policer to a CCC interface.
If you are using IP over MPLS, you bind the policer to the
interface. You cannot bind a policer to the LSP when you are using IP over MPLS.
The schedulers for using CoS with MPLS are the same as for the other CoS configurations
on EX Series switches. Default schedulers are provided for
forwarding classes. If you are using
custom forwarding classes, we recommend that you configure a scheduler to support
that forwarding class. See "Understanding CoS Schedulers" on page 3387.
Junos OS MPLS for EX Series Switches Overview on page 3641
Understanding CoS Classifiers on page 3381
Understanding CoS Schedulers on page 3387
Example: Configuring CoS on EX Series Switches on page 3401
Configuring CoS on an MPLS Provider Edge Switch Using Circuit Cross-Connect (CLI
Procedure) on page 3451
Configuring CoS on an MPLS Provider Edge Switch Using IP Over MPLS (CLI Procedure)
on page 3450
Configuring Rewrite Rules for EXP Classifiers on MPLS Networks (CLI Procedure)
Configuring CoS on Provider Switches of an MPLS Network (CLI Procedure) on page 3690
Defining CoS Rewrite Rules (CLI Procedure) on page 3444
Configuring Policers to Control Traffic Rates (CLI Procedure) on page 3300
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