Wred based on MPLS exp bits on 12000

Question

I want to use WRED with MQC on 12000 but there is no mpls/exp-bits statment on the "random-detect" command.
I found this note at cisco documentation:
Note: The legacy CLI also uses the precedence syntax for Multiprotocol Label Switching (MPLS) traffic. The router treats the MPLS bits as though they are IP Type of Service (ToS) bits and puts the appropriate packets into the correct queues. This is not at all true for MQC.
so, is there a way to use WRED with MPLS EXP-bits on MQC?

Answer 1

Hi,
As fas as I know the solution is as follows:
1. Use MQC on the inbound interface of your P/PE LSR to match your desired traffic and set discard-class
2. Use MQC on the outbound interface of your P/PE
LSR to set desired WRED policy based on discard-class you marked in previous step. You also need to mark WRED as "discard-class-based"
Here is an example:
Inbound:
class-map class1
match XXXXX
class-map class2
match YYYYY
policy-map in-policy
class class1
set discard-class 0
class class2
set discard-class 1
Outbound:
policy-map out-policy
class class-default
random-detect discard-class-based
random-detect discard-class 0 10 20 5
random-detect discard-class 1 20 30 5
Hope that helped.
David