Which description of this behavior is true?

In a L2VPN service, customer CE sends frames to PE1 using a CoS making value of 3. However, the remote CE receives those frames from PE2 with a CoS marking value of 0.

Which description of this behavior is true?
A . Egress PE2 is not configured with an outbound policy-map facing CE2 to preserve CoS marking
B . Egress PE2 is marking EXP 0 upon label imposition
C . Egress PE2 is not configured with mpls Ldp explicit-null command
D . Ingress PE1 is remarking the CoS frame received from CE1 with valuye of 0

View Answer

Answer: D