Value,Description,Reference
0,Reserved,[RFC6257]
1,initialization vector (IV),[RFC6257]
2,reserved,[RFC6257]
3,key-information,[RFC6257]
4,fragment-range (pair of SDNVs),[RFC6257]
5,integrity signature,[RFC6257]
6,unassigned,
7,salt,[RFC6257]
8,PCB integrity check value (ICV),[RFC6257]
9,reserved,[RFC6257]
10,encapsulated block,[RFC6257]
11,block type of encapsulated block,[RFC6257]
12-191,reserved,[RFC6257]
192-250,private use,[RFC6257]
251-255,reserved,[RFC6257]