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    Software Classifiers Overview

    An E Series router supports a variety of software classifiers, depending on the type of interface. Policy Resources Overview lists 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 10.1.1.2host1(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 1.

    Table 1: 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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    Published: 2014-08-14