Bit,Name,Reference
0,B bit: P2MP Branch LSR capability,[RFC5073]
1,E bit: P2MP Bud LSR capability,[RFC5073]
2,M bit: MPLS-TE support,[RFC5073]
3,G bit: GMPLS support,[RFC5073]
4,P bit: P2MP RSVP-TE support,[RFC5073]
5-7,Unassigned,