Value,Description,Reference
0,Reserved,[RFC9516]
1,Source ID TLV,[RFC9516]
2,Errored TLVs,[RFC9516]
3,Reply Service Function Path Type,[RFC9516]
4,SFF Information Record Type,[RFC9516]
5,SF Information,[RFC9516]
6-239,Unassigned,
240-251,Reserved for Experimental Use,[RFC9516]
252-254,Reserved for Private Use,[RFC9516]
255,Reserved,[RFC9516]