We are preparing to migrate our server running SBS2003 to SBS2011, in doing so we have to reconfigure the network from a dual NIC configuration to a single NIC configuration. The way it is now, the connection comes in like this:
Internet - Cable modem - router - server - LAN switch
The new configuration is:
Internet - Cable modem - router - LAN switch
We also use 90.0.0.* as our internal IP range and it looks like we will not be able to use that in the new OS, so will be switching to 192.168 during this process. I am not very experienced in networking so I want to make sure that I am doing this right. Also if it helps any, the server is virtualized on VMWare ESXI 5.0.
Please confirm the process for me:
1. Disconnect network cable between router-server from server, disable this NIC in Network Connections on the server.
2. Connect network cable between router-switch.
3. Disable DHCP on the router.
4. Run Configure Email and Internet Connection Wizard. I haven't ran this in years so I don't remember what this entails, I assume this is where I reassign the static IP of the server and other settings, is this also the time I would change the internal IP range to 192.168?
5. Reboot server.
6. For our systems that use DHCP, do I need to go to each one and ipconfig /release and then ipconfig /renew?
7. For systems using static IP, I assume it should be simple to just change their IP to the new range and it will work OK?
8. All computers on the network would use the server IP as their primary DNS server? The gateway would be the router IP and not the server IP?
9. With this new configuration, if I do a server reboot or bring the server down for whatever reason, would the internet connection still be available and 100% functional to computers in the office?
Thank you for any help/clarification.