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Platform Considerations ! 109

Chapter 4: Policy Resources

Platform Considerations

Policy services are supported on all E-series routers.

For information about the modules supported on E-series routers:

! See the ERX Module Guide for modules supported on ERX-7xx models,

ERX-14xx models, and the ERX-310 router.

! See the E320 Module Guide for modules supported on the E320 router.

FPGA Hardware Classifiers

Classification is the process of taking a single data stream in and sorting it into

multiple output substreams. The classifier engine on an E-series router is a

combination of PowerPC processors, working with an FPGA for a hardware assist.

In the Differentiated Services (DiffServ) architecture, two basic types of classifiers

exist. The first classifier type is a multifield (MF) classifier. The MF classifier can

examine multiple fields in the IP datagram header to determine the service class to

which a packet belongs.

Table 15: 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

! 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

Brand	Juniper
Model	E320
Category	Network Router
Language	English

Juniper E320 User Manual

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Juniper E320 Specifications

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