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## Software Classifiers Overview

An E-series router supports a variety of software classifiers, depending on the type of interface. Table 17 and Table 18 list the supported software classifiers for each interface type.

A line module supports 16,383 software classifiers. Software classifiers are consumed at a rate of one resource per classifier category per policy. For example, if you configure a policy that has three different destination route class rules, then because all three rules are for the same classifier category, that policy consumes only one software classifier resource. However, if you configure a policy that requires classification on three different classifier categories, such as ToS, color, and TCP flags, then that policy consumes three of the available 16,383 software classifier resources.

| Note: Policy consumption is per policy definition per line module.

In this example, the policy list named polWestford5 references four classifier lists with a combination of software and hardware classifiers.

`

host1(config)#ip classifier-list clacl100 color red ip any any
host1(config)#ip classifier-list clacl200 color yellow user-packet-class 6 ip host 10.1.1.1 host 10.1.1.2
host1(config)#ip classifier-list clacl300 color green user-packet-class 5 ip any any
host1(config)#ip classifier-list clacl400 color red ip host 10.1.1.10 any
host1(config)#ip policy-list polWestford5
host1(config-policy-list)#classifier-group clacl100
host1(config-policy-list-classifier-group)#forward
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#classifier-group clacl200
host1(config-policy-list-classifier-group)#forward
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#classifier-group clacl300
host1(config-policy-list-classifier-group)#forward
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#classifier-group clacl400
host1(config-policy-list-classifier-group)#forward
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#classifier-group *
host1(config-policy-list-classifier-group)#filter
host1(config-policy-list-classifier-group)#exit
host1(config-policy-list)#exit

`

For a given line module, the policy list named polWestford5 consumes a total of one FPGA hardware classifier resource and two software classifier resources, as indicated in Table 25.

Table 25: Resource Consumption

Number of Resources Consumed | Classifier Category
--- | ---
1 hardware | Protocol Destination address Source address
1 software | Color
1 software | User-packet-class

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