I got an interesting email from Ying Lu who had read my posts on LSM: I am curious about the Ethernet DA and codepoint used for multicast MPLS. Previously, I understand that: Ethernet DA is unicast MAC of nexthop of each replication leg. codepoint is 0x8847 However, looking at RFC5332, I am not so sure... Quote: "Ethernet is an example of a multipoint-to-multipoint data link. Ethertype 0x8847 is used whenever a unicast ethernet frame carries an MPLS packet.