Type,Description,Reference
0,Reserved,[RFC7854]
1,"Local system closed, NOTIFICATION PDU follows",[RFC7854]
2,"Local system closed, FSM Event follows",[RFC7854]
3,"Remote system closed, NOTIFICATION PDU follows",[RFC7854]
4,"Remote system closed, no data",[RFC7854]
5,Peer de-configured,[RFC7854]
6,"Local system closed, TLV data follows",[RFC9069]
7-250,Unassigned,
251-254,Experimental,[RFC7854][RFC Errata 7194]
255,Reserved,[RFC7854][RFC Errata 7194]