Policy Resources Overview

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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 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 13 lists the classifiers supported on OC48/STM16, GE-2, and GE-HDE line modules; Table 14 lists the classifiers supported on all other line modules.

Table 13: Classifier Support (OC48/STM16, GE-2, and GE-HDE Line Modules)

Interface Type	Hardware Classifier	Software Classifier
All interface types (except IP and IPv6)	–	Color Traffic class User packet class
Frame Relay	Not supported	DE bit
GRE tunnels	Not supported	ToS
IP	Color Destination address Destination port Destination route class ICMP type and code IGMP type IP flags IP fragmentation Local Protocol Source address Source port Source route class TCP flags ToS Traffic class User packet class	Not supported
IPv6	Color Destination address Destination port Destination route class ICMPv6 type and code Local Protocol Source address Source port Source route class TC flags TCP flags Traffic class User packet class	Not supported
MPLS	Not supported	EXP
VLAN	Not supported	User priority

Table 14: Classifier Support (All Line Modules Except OC48/STM16, GE-2, and GE-HDE)

Interface Type	Hardware Classifier	Software Classifier
All interface types	–	Color Traffic class User packet class
Frame Relay	Not supported	DE bit
GRE tunnels	Not supported	ToS
IP	Destination address Destination port ICMP type and code IGMP type Protocol Source address Source port	Destination route class IP flags IP fragmentation Local Source route class TCP flags ToS
IPv6	Destination address Destination port ICMPv6 type and code Protocol Source address Source port	Destination route class Local Source route class TC field TCP flags
MPLS	Not supported	EXP
VLAN	Not supported	User priority

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