Policy Resources; Policy Resources Overview - Juniper POLICY MANAGEMENT - CONFIGURATION GUIDE V11.1.X Configuration Manual

Chapter 8

Policy Resources

Policy Resources Overview

This chapter provides information about configuring policy resources. The chapter
discusses the following topics:
Policy Resources Overview on page 159
FPGA Hardware Classifiers on page 161
CAM Hardware Classifiers Overview on page 162
Size Limit for IP and IPv6 CAM Hardware Classifiers on page 163
Creating and Attaching a Policy with IP Classifiers on page 168
Variable-Sized CAM Classification for IPv6 Policies Examples on page 171
Performance Impact and Salability Considerations on page 175
Software Classifiers Overview on page 178
Interface Attachment Resources Overview on page 179
CAM Hardware Classifiers and Interface Attachment Resources on page 180
Range Vector Hardware Classifiers and Interface Attachment
Resources on page 180
The maximum number of policies that you can attach to interfaces on an E Series
router depends on the classifier entries that make up the policy and the number of
attachment resources available on the interface. JUNOSe software allocates interface
attachment resources when you attach policies to interfaces. See "Interface
Attachment Resources Overview" on page 179 for information about attachment
resources.
An E Series router supports software and hardware classifiers. A policy can be made
up of any combination of software and hardware classifiers. You use the classifier-list
command to configure all classifiers.
There are two categories of hardware classifiers, depending on the type of line module
being used. OC48/STM16, GE-2, and GE-HDE line modules support
content-addressable memory (CAM) hardware classifiers all other line modules
support FPGA hardware classifiers. Table 17 on page 160 lists the classifiers supported
on OC48/STM16, GE-2, and GE-HDE line modules; Table 18 on page 161 lists the
classifiers supported on all other line modules.
Policy Resources Overview
159