First get a list of interfaces:
wmic nicconfig get caption,index,TcpipNetbiosOptions
Make note of the number of the interface you want to change. Once you have it (for example, number 0000009), do this to enable:
wmic nicconfig where index=9 call SetTcpipNetbios 1
List of options:
0 – Use NetBIOS setting from the DHCP server
1 – Enable NetBIOS over TCP/IP
2 – Disable NetBIOS over TCP/IP