RSPAN clearing DSCP settings

Answered Question
Feb 13th, 2007

Hi,

I am generating traffic with a few different DSCP values (Voice, Signaling, other)

When I SPAN the ports of devices in the path I can see the correct DSCP values at each point.

When I RSPAN the same devices & interfaces the DSCP values are all set to 0.

What do I have to do to make sure RSPAN passes the same DSCP value as SPAN would?

Regards, MH

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Correct Answer by bwilmoth about 9 years 7 months ago

The rewrite only occurs during an RSPAN session where there is an untrusted port.Trusting dscp on the ingress interface and having the client set dscp. In this condition, the dscp value will not be rewritten through the rspan session

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Correct Answer
bwilmoth Mon, 02/19/2007 - 13:49

The rewrite only occurs during an RSPAN session where there is an untrusted port.Trusting dscp on the ingress interface and having the client set dscp. In this condition, the dscp value will not be rewritten through the rspan session

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