I've got an existing SBS 2003 R2 server called JANET.WORKNET.LOCAL with 2 NICS, one with IP 192.168.X.Y facing the WAN and the other with IP 10.20.X.Y facing the LAN. Attached to the LAN as DHCP clients are 4 workstations. They are confgured to get TCP/IP and DNS settings automatically. The WAN IP connects to a ISP router.
I have a new SBS 2011 Standard server called JANET.WORKNET.LOCAL with 4 NICS. (yes, the same name - bear with me).
One WAN NIC has IP 192.168.X.Y (yes, the same as the 2003 R2 machine - bear with me some more).
The LAN NIC has IP 10.20.X.Y.
The server is configured as a DC and provides automatic TCP/IP and DNS settings to clients.
This server is attached to a DIFFERENT ISP router which has a completely different internet facing IP address.
Both Servers have the same DHCP scope definitions, same DHCP reservation definitions, same certificates installed in the relevant certificate stores.
Everything should be the same except the operating systems.
I take a workstation client on the 2003 R2 network, remove it from the domain and put it into a workgroup. Unplug it from the 2003 R2 network, attach it to the 2011 network and try to get it to join the domain (using both the http://connect
and USB options).
The problem is, although the workstation receives the correctly reserved IP address from the 2011 server, and the server can ping the workstation successfully, the workstation cannot ping the server correctly and on the workstation it says that the NIC has "no internet connectivity". I get the "warning" symbol on the "network and sharing center" task bar icon.
I can take the workstation back to the 2003 network and rejoin it, but I can't seem to get it to sit on the 2011 network successfully.