Value,Description,Reference
0,Reserved,[RFC9516]
1,SFC Echo Request,[RFC9516]
2,SFC Echo Reply,[RFC9516]
3,SFP Consistency Verification Request,[RFC9516]
4,SFP Consistency Verification Reply,[RFC9516]
5-239,Unassigned,
240-251,Reserved for Experimental Use,[RFC9516]
252-254,Reserved for Private Use,[RFC9516]
255,Reserved,[RFC9516]