Bit,Description,Reference
0-6,Unassigned,
7,"SR-Algorithm Flag (TEMPORARY - registered 2023-09-13, publication requested 2025-05-22)",[draft-ietf-pce-sid-algo-12]
8,NAI is absent (F),[RFC8664]
9,SID is absent (S),[RFC8664]
10,"SID specifies TC, S, and TTL in addition to an MPLS label (C)",[RFC8664]
11,SID specifies an MPLS label (M),[RFC8664]