I'm in the process of building a geographical cluster for DR purposes using NeverFail as the cluster solution. We will be connected to the DR site with a dedicated WAN link and the network and VLANs will be extended across this link to the DR site. All servers are running 2003 RTM and the AD is 2003.
I currently have two domain controllers on my network named AD1 and AD2. Both are configured identical to each other with DNS, DHCP (50/50 split on the available pool), NTP and Global Catalog. Everything is AD integrated where possible. My primary controller, AD1, has the FSMO roles and is the authorative time server. All of the servers and workstations have their DNS settings pointing to thse two boxes.
I had origionally planned on adding a thirdand maybe a forth domain controller at the DR site and simply allow Active Directory to naturally replicate itself to these additional domain controllers. They would be named AD3 and AD4. That, however, leaves me with several problems:
1. Assuming the worst and the primary site blows up, the servers will fail over to the DR site but will now be pointing to DNS servers that no longer exist.
2. Again, if the primary blows up the FSMO roles will be gone.
3. This must be a fully automated solution. I can't make any changes to the DR site to fix any fail over related issues.
So, my questions are as follows:
1. Do I move one of my existing domain controllers to the DR site so that there will be a configured DNS there as well? That way the primary DNS will be at the main site and the secondary DNS willb e at the DR site.
2. I've configured the DNS servers in my DHCP scopes. Can I simply add one or more DNS server at the DR site and add them into my DNCP scopes? Can XP, Win7, Win 2008 use more than 2 DNS settings?
3. Assuming the primary site blows up and I have to rebuild the domain controllers on that side. How would I remove then readd the blown up servers from AD? I assume there's a manual process to remove a dead domain controller from the domain?
Any and all suggestions will be greatly appreciated