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Signaling/QOS marking question.

Callmanager is marking signaling as PHB CS3 (DSCP 24). I have been instructed to ensure that this traffic gets into our MPLS Class 2 which matches on AF31.

My question is from a performance and best practice perspective, is it better to change the enterprise paramater in callmanager to mark signaling as AF31? or should I just re-mark in our 6500 or WAN routers? Any negative side affect to having CCM mark as AF31?

Regards,

  • IP Telephony
1 REPLY

Re: Signaling/QOS marking question.

Cisco recommends to do marking as close to source as possible, so I would do it on CM. CM is already doing it with different dscp value, so this will not have any side effect.

You can do it on your 6500 or router but this is additional overhead and can be done on CM.

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