I'm in the process of replacing some servers here, 2 of which are domain controllers and also preferred and alternate DNS servers for the domain. I replaced the alternate DNS server and DC2 server a while ago by demoting the old DC, removing from domain, then re-iping the new DC2 server to the old address and then ipconfig /registerdns and dcdiag /fix and all seemed to work fine.
Now I need to do the same for my original DC1 server which is also the preferred DNS server for all my servers and desktops. So, what would be the steps for this? 2003 Native Domain.
1. Change IP address of OLDDC1 to something else and run ipconfig /registerdns and dcdiag /fix to update DNS. How would this would work if the preferred DNS is no longer available as this was it?
2. Change IP address of NEWDC1 to the original OLDDC1 IP address and run ipconfig /registerdns and dcdiag /fix to update DNS which is should find OK?
Is that right? I'm not sure how its going to function when I pull the preferred DNS server out of the equation that's all.
Also, as an aside, I have been planning to upgrade my DCs to 2008, but as I currently have 2003 Enterprise and would only need 2008 Standard I need to reinstall. Would it be best if I do this on the NEWDC1 before I do the replace with the old one, and if so are there any implications for a combined 2003/2008 AD/DNS infrastructure?