Bit,Description,Reference
0-14,Unassigned,
15-16,Routing Granularity (RG),"[RFC8779, Section 2.2]"
17,Core-tree computation (C-bit),[RFC7334]
18,Fragmentation (F-bit),[RFC8306]
19,P2MP (N-bit),[RFC8306]
20,ERO-compression (E-bit),[RFC8306]
21,Make-before-break (M-bit),[RFC5557]
22,Report the request order (D-bit),[RFC5557]
23,Path Key (P-bit),[RFC5520]
24,Supply OF on response,[RFC5541]
25,VSPT,[RFC5441]
26,Strict/Loose,[RFC5440]
27,Bi-directional,[RFC5440]
28,Reoptimization,[RFC5440]
29-31,Priority,[RFC5440]