I am using 3750 as a L2 switch in between MPLS PE and MPLS P router. The ports (on 3750M) connecting to MPLS devices are just L2 ports no IP or no LDP. I want to know if I can configure QOS on L2 ports of 3750. Can I map MPLS EXP to COS on switch?
You will not be able to do this, as the switches look at the layer 2 or 3 cos markings, whilst the MPLS exp value is at layer 2.5, between the IP and MAC layers.
But if the MPLS exp value has been set from that of the IP precedence/DSCP from the CE packet, aka uniform mode MPLS QOS, then you can just use your cos maps to match the ip dscp/precendence to cos etc.
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