Packet processing of MPs

For an MA carrying VLAN attribute, MPs of the MA send packets only in the VLAN that the MA serves. The level of packets sent by an MP equals the level of the MD to which the MP belongs.

For an MA not carrying VLAN attribute, MPs of the MA can only be outward-facing MEPs. The level of packets sent by an outward-facing MEP equals the level of the MD to which the MEP belongs.

A MEP forwards packets at a higher level without any processing and only processes packets of its level or lower.

A MIP forwards packets of a different level without any processing and only processes packets of its level.