Juniper E Series Configuration Guide

JUNOSe 7.2.x Policy Management Configuration Guide
110 ! CAM Hardware Classifiers
FPGA hardware classifiers are supported on all line modules except the
OC48/STM16, GE-2, and GE-HDE line modules. Ta b l e 1 5 lists the FPGA classifiers
and software classifiers supported for each interface type.
An E-series router supports two versions of policies that are based on FPGA
hardware classifiers. One version has a maximum of 16 classifier entries per policy,
and the second version has 17 to 32 classifier entries per policy. The line module
supports 16,255 policies when all policies have 16 hardware classifier entries or
fewer, and supports 8127 policies when all policies have 17 to 32 hardware
classifier entries.
You can configure a combination of the two versions of FPGA hardware
classifier-based policies—you can have some that contain 16 or fewer classifier
entries and others with more than 16 entries. In this case, between 8127 and
16,255 policies are supported, depending on the actual configuration.
You can also configure hardware classifier-based policies that have more than 32
classifier entries. The router groups the classifiers into blocks of 32. For example, if
you configure a policy with 100 classifier entries, the router groups these as 3
policies that have 32 classifier entries and 1 policy with 4 classifier entries. The
group with 4 classifier entries actually consumes 16 classifier resources, which is
the minimum number consumed for a group in a mixed-mode hardware classifier
configuration.
Unlike policies that are based on software classifiers, policies that are based on
FPGA hardware classifiers consume resources at a rate of one resource per policy,
regardless of the number of different hardware classifier categories in the policy.
For example, if a classifier list has three hardware classifiers, such as destination
address, source address, and protocol, the policy referencing that classifier list
consumes only a single hardware classifier resource.
The same is true when multiple policy rules reference the classifier list. For
example, if four policy rules reference the same classifier list (which contains three
hardware classifiers), then still only one classifier entry is consumed.
CAM Hardware Classifiers
CAM hardware classifiers are supported on the OC48/STM16, GE-2, and GE-HDE
line modules. Ta b l e 1 4 lists CAM hardware classifiers and the software classifiers
supported for each interface type.
The OC48/STM16 line module supports 128,000 CAM entries, and the GE-2 and
GE-HDE line modules support 64,000 CAM entries. For most configurations, each
classifier entry in a policy consumes one CAM entry. However, a policy that has only
the default classifier consumes no CAM resources.
Example In this example, the policy consumes a total of four CAM entries: two entries for
clacl1, one for clacl2, and one for the default classifier.
host1(config)#ip classifier-list clacl1 ip host 192.168.1.1 host 192.168.2.2 tos 1
host1(config)#ip classifier-list clacl1 ip host 192.168.1.1 host 192.168.2.2 tos 2
host1(config)#ip classifier-list clacl2 tcp any any tcp-flags "SYN"
host1(config)#ip policy-list policy1
host1(config-policy-list)#classifier-group clacl1

Juniper E Series Specifications

General

Brand	Juniper
Model	E Series
Category	Network Router
Language	English