HP UX IPQos Software manual Example 2 Trusted Applications and Dscp

HP-UX IPQoS Configuration File Examples

Example 2: Trusted Applications and DSCP

Example 2: Trusted Applications and DSCP

This example shows how to avoid overwriting the DSCP field of traffic from an originating application that sets a DSCP value. Use this type of configuration for trusted applications that include their own DSCP setting.

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#Sample file for protecting DSCP on trusted applications

filter dscp_set { # recognize traffic that already has dscp set dscplo 1

dscphi 63 priority 1

}

filter no_dscp_set { # recognize traffic that does not have dscp set dscplo 0

dscphi 0 priority 2

}

policy allowthru { # don’t change anything about the dscp field uses dscp_set

}

policy setdscp { # set the dscp field for traffic with no previous dscp setting uses no_dscp_set

dscp 10

}

adapter lan0 {

uses allowthru, setdscp

}

#

#

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This example illustrates how to avoid overwriting DSCP fields for application traffic that controls its own DSCP fields. Additionally, you can create several classes of traffic, then use different policies to set the DSCP field for each traffic class to an appropriate value for each class.

Appendix B 121