QoS - Config verification

tckoon · ‎08-07-2008

Refer to below class-map, for MPLS network.

If the MPLS label which have EXP bit set to 2 and the IP packet reside in the MPLS packet, have DSCP 34.

Will this match ?

class-map match-any GOLD

match ip dscp 34

match mpls experimental 4

lee.reade · ‎08-08-2008

Hi,

When you are doing MPLS label forwarding, the IP packet does not get inspected at all at any point during the MPLS switching.

So if you are looking to offer QOS inside an MPLS core then you need to match on MPLS EXP values.

Once the MPLS label has been popped off you can then match on IP DSCP again.

HTH

LR

tckoon · ‎08-08-2008

But the problem is when I show policy-map interface, on DSCP counter I saw counter increased what ever the EXP counter did. But number is not identical but close to.

Regards