Type,Name,Reference
1,NHRP Resolution Request,[RFC2332]
2,NHRP Resolution Reply,[RFC2332]
3,NHRP Registration Request,[RFC2332]
4,NHRP Registration Reply,[RFC2332]
5,NHRP Purge Request,[RFC2332]
6,NHRP Purge Reply,[RFC2332]
7,NHRP Error Indication,[RFC2332]
8-127,Unassigned,
128-255,Reserved,