Cisco – How to tag traffic with a DSCP value on an ASA

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I have a SIP Server that does not put a DSCP code on it's traffic. This server is behind an ASA, and I want to prioritize its traffic passing through an ASA from the private to public network.

I am using the ASA shape feature, and have it set to prioritize "EF AF31" DSCP.

I am assuming I would use and ACL to match the traffic, but then would I use a class map / policy map to mark the traffic on the inside, before it passes
through the shaper?

Best Answer

To my knowledge, the ASA platform is only able to classify based on existing DSCP markings, not apply or change them.

It does preserve existing markings, though.

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