Value,Forwarding Context Header Types,Reference
0x0,12-bit VLAN identifier,[RFC9263]
0x1,24-bit double tagging identifiers,[RFC9263]
0x2,20-bit MPLS VPN label,[RFC9263]
0x3,24-bit virtual network identifier (VNI),[RFC9263]
0x4,32-bit Session ID,[RFC9263]
0x5-0xE,Unassigned,
0xF,Reserved,[RFC9263]