I have a similar, but strange situation.
Here's the layout.
Windows 2000 Server with Windows 2000 Professional Clients
Server is a domain controller
Server has two NICS (internet and internal)
Internet NIC is connected directly to cable modem/router
Internal NIC is connected to switch
All clients are connected to same 24 port switch
ICS is enabled on Interet NIC
Internet NIC is configured w/statip IP/DNS information
There is a second server (DC) connected directly to the modem/router and it is configured w/Static IP/DNS info..no ICS on this machine...this server is used for remote offices to access their work databases on the server.
This was working like a champ until this morning..when the cable modem went out. I've been having a headache with this setup all day since Charter replaced the modem. Here is what is happening.
If I power both servers down, then bring them up one at a time, things are good...everyone gets an IP address and can access the internet.
HOWEVER, after about 15 to 60 minutes, I get a message on the server that is using ICS that there is an IP conflict and the internal NIC has been disabled. Then no one can surf, yet I can release/renew the IP addresses and get a 192.168.0.x address on each workstation.
I then have to go back and redo the whole thing....I'm in a continous loop of frustration.
When I boot the ICS server up, it takes a very long time to 'prepare network connections'....
I know there is probably a very simple fix to this....oh and when the workstations lose their browsing capabilities, they can still see other computers on the network as well as the 2nd domain.
Help, please?