Type,Name,Reference
0,Version,[RFC6450]
1,Client ID,[RFC6450]
2,Sequence Number,[RFC6450]
3,Client Timestamp,[RFC6450]
4,Multicast Group,[RFC6450]
5,Option Request,[RFC6450]
6,Server Information,[RFC6450]
7,Deprecated,[RFC6450]
8,Deprecated,[RFC6450]
9,TTL,[RFC6450]
10,Multicast Prefix,[RFC6450]
11,Session ID,[RFC6450]
12,Server Timestamp,[RFC6450]
13-65531,Unassigned,
65532-65535,Experimental,[RFC6450]