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Preference of per-VR Versus per-LSP Behavior

MPLS always prefers the per-LSP method of matching and setting EXP bits by means of applied policies over the per-VR method.

Per-VR matching of EXP bits is not performed on the LSP when an input policy (matching on incoming EXP bits) is attached to the ingress segment of the LSP.

Similarly, per-VR setting of EXP bits is not performed on the LSP when an output policy (setting the outgoing EXP bits) is attached to the egress segment of the LSP.

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