Code,Datalink Type,Reference
0,IEEE 802.3,[RFC1761]
1,IEEE 802.4 Token Bus,[RFC1761]
2,IEEE 802.5 Token Ring,[RFC1761]
3,IEEE 802.6 Metro Net,[RFC1761]
4,Ethernet,[RFC1761]
5,HDLC,[RFC1761]
6,Character Synchronous,[RFC1761]
7,IBM Channel-to-Channel,[RFC1761]
8,FDDI,[RFC1761]
9,Other,[RFC1761]
10-15,Reserved,[RFC3827]
16,Fibre Channel,[RFC3827]
17,ATM,[RFC3827]
18,ATM Classical IP,[RFC3827]
19-25,Reserved,[RFC3827]
26,IP over Infiniband,[RFC4391][RFC3827]
27-4294967295,Unassigned,