Code,Description,Reference
0,Reserved,[RFC8175]
1,Multi-Hop Forwarding,[RFC8629]
2,Control-Plane-Based Pause,[RFC8651]
3,Link Identifiers,[RFC8703]
4,Latency Range,[RFC8757]
5,IEEE 802.1Q Aware Credit Window,[RFC-ietf-manet-dlep-ether-credit-extension-09]
6,DiffServ Aware Credit Window,[RFC-ietf-manet-dlep-da-credit-extension-21]
7-65519,Unassigned,
65520-65534,Reserved for Private Use,[RFC8175]
65535,Reserved,[RFC8175]