There is a similar topic
already solver but since the solution doesn't work for me, I create a new thread. I have a similar set up: WinSrv2012 (VM), two NIC cards (one to with access to LAN one with access to internet). But the LAN network still unidentified though as advised, I put the DNS suffix to the LAN connection and IPv6 is disabled. My configuration is:
No default gateway but a permanent route for 10.0.0.0/8 to 10.4.100.1 which is the gateway of this network
DNS Suffix added to advanced properties
Not sure if it's the best practice. But like this the network doesn't get identified.
If I put a gateway to the LAN connection, (despite the error message for dual gateway) my two network are identified to the same network...
Thanks ahead for the help.