When I configure my Windows Server Core with Sconfig it's working well and get an IP from my DHCP server.
But it's not working with PowerShell. I'm using this command:
Set-NetIPInterface -InterfaceAlias "Ethernet 2" -Dhcp Enabled
ipconfig result:
Ethernet adapter Ethernet 2:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::e432:65ae:f7a7:c350%4
Default Gateway . . . . . . . . . :