Value,Description,Reference
Bit 0,V (VCCV) bit,[RFC5085]
Bit 1,S (Sequence) bit,[RFC3931]
Bit 2,B (Fragmentation) bit,[RFC4623]
Bit 3,E (Fragmentation) bit,[RFC4623]
Bit 4,Reserved,[RFC3931]
Bit 5,Reserved,[RFC3931]
Bit 6,Reserved,[RFC3931]
Bit 7,Reserved,[RFC3931]