[c-nsp] ME3400 odd DSCP bit issue

[Sigurbjörn Birkir Lárusson]

You need to have mls qos trust dscp on the port on the 3560 facing the
computer, is that in place?

Kind regards,
Sibbi

On 21.5.2012 14:42, "Lee Starnes" <lee.t.starnes at gmail.com> wrote:

>Hello all,
>
>Previously I had an issue where we were stripping the dscp bits coming
>into
>our switch and this was solved with the policy-map that does a set dscp
>dscp. I can send a packet from a laptop with the bits market and see these
>bits make it all the way through our network. However, what is happening
>is
>our customer is setting the dscp value on their switch and not from the
>device sending the packets. When they do this, the bits get set to 0. If
>they disconnect their switch and connect a laptop in place of the link to
>them from us, they see the marked packets.
>
>So, my question is what causes these dscp bits to change based on the
>customer's switch setting them and a computer setting them?
>
>Computer <---> 3560 <---> ME3400 (3560 sets the dscp bit and we DON'T see
>it.)
>Computer <---> 3560 <---> ME3400 (computer sets the dscp bit and we DO see
>it.)
>
>Computer <---> 3560 <---> Computer (3560 sets the dscp bit and we see it.)
>
>Any insight on this would be greatly appreciated.
>
>Thanks,
>
>-Lee
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