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System Administration Guide: IP Services

ProcedureHow to Define Filters in the IPQoS Configuration File

The next procedure shows how to define filters for a class in the IPQoS configuration file.

Before You Begin

The procedure assumes that you have already started file creation and have defined classes. The steps continue building the /var/ipqos/Goldweb.qos file that is created in How to Create the IPQoS Configuration File and Define Traffic Classes.

Note –

As you create the IPQoS configuration file, be very careful to start and end each class clause and each filter clause with curly braces ({ }). For an example of the use of braces, use Example 28–1.

  1. Open the IPQoS configuration file, and locate the end of the last class that you defined.

    For example, on the IPQoS-enabled server Goldweb, you would start after the following class clause in /var/ipqos/Goldweb.qos:


    class {
        name video
        next_action markEF
        enable_stats FALSE
    }

  2. Define a filter clause to select outgoing traffic from the IPQoS system.


        filter {
        name webout
        sport 80
        direction LOCAL_OUT
        class goldweb
    }
    name webout

    Gives the name webout to the filter.

    sport 80

    Selects traffic with a source port of 80, the well-known port for HTTP (web) traffic.

    direction LOCAL_OUT

    Further selects traffic that is outgoing from the local system.

    class goldweb

    Identifies the class to which the filter belongs, in this instance, class goldweb.

    For syntactical and detailed information about the filter clause in the IPQoS configuration file, refer to filter Clause.

  3. Define a filter clause to select streaming video traffic on the IPQoS system.


        filter {
        name videoout
        sport videosrv
        direction LOCAL_OUT
        class video
    }
    name videoout

    Gives the name videoout to the filter.

    sport videosrv

    Selects traffic with a source port of videosrv, a previously defined port for the streaming video application on this system.

    direction LOCAL_OUT

    Further selects traffic that is outgoing from the local system.

    class video

    Identifies the class to which the filter belongs, in this instance, class video.

See Also