Value,Description,Reference
0,Pad1 TLV,[RFC8754]
1,Reserved,[RFC8754]
2,Reserved,[RFC8754]
3,Reserved,[RFC8754]
4,PadN TLV,[RFC8754]
5,HMAC TLV,[RFC8754]
6,Reserved,[RFC8754]
7-123,Unassigned,
124-126,Experimentation and Test,[RFC8754]
127,Reserved,[RFC8754]
128-251,Unassigned,
252-254,Experimentation and Test,[RFC8754]
255,Reserved,[RFC8754]