DNS Server Migration to Windows Server 2008 R2 from Windows Server 2003?
Hi All:
We are in process of upgrade our Windows 2003 Servers. Initially we had 5 Windows 2003 Servers, we migrated 3 of them to Windows Server 2008 R2. We didn't upgrade our DNS and DHCP servers that are running on Windows 2003 Server.
Now we need to migrate our existing DNS and DHCP servers as well. Can anyone guide me step by step. What will be the downtime for clients (if any)? How will it impact network side in our environment?
We are in process of upgrade our Windows 2003 Servers. Initially we had 5 Windows 2003 Servers, we migrated 3 of them to Windows Server 2008 R2. We didn't upgrade our DNS and DHCP servers that are running on Windows 2003 Server.
Now we need to migrate our existing DNS and DHCP servers as well. Can anyone guide me step by step. What will be the downtime for clients (if any)? How will it impact network side in our environment?
Lucian Constantin
See if this article will help you: Active Directory Domain Services and DNS Server Migration Guide
The first, open DNS management console on Windows Server 2003 and check what kind of DNS type do you have. I suppose you have Active Directory Integrated zone. Click right mouse button on your zone name in console and choose "Properties". On "General" tab check DNS type. If it is Active Directory Integrated you have no problem. If not, do you use any other DNS servers in your network based on Unix? If not, convert you zone into AD-I.
After that, you can simply add DNS role on your 2008 servers and then check it also as AD-I. Make your 2008 DCs as Global Catalogs. Wait for replication and you will have DNS server on 2008 DCs :)
For DHCP you can migrate your database from 2003 to 2008, but it will require a short breakout in DHCP queries serving. If you're interested just tell me.
After that, you can simply add DNS role on your 2008 servers and then check it also as AD-I. Make your 2008 DCs as Global Catalogs. Wait for replication and you will have DNS server on 2008 DCs :)
For DHCP you can migrate your database from 2003 to 2008, but it will require a short breakout in DHCP queries serving. If you're interested just tell me.
Also this one would be helpful: DHCP Server Migration Guide
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If your current DNS zone are Active Directory integrated then there is no need to migrate the data has already replicated to the Domain Controllers. If the zones aren't AD integrated then store them in AD by going to the properties of the zone and check Store in AD this will allow full replication between all domain controllers.
For DHCP http://www.windowsreference.com/windows-server-2008/step-by-step-tutorial-how-to-migrate-dhcp-server-from-a-windows-server-2003-to-windows-server-2008/
For DHCP http://www.windowsreference.com/windows-server-2008/step-by-step-tutorial-how-to-migrate-dhcp-server-from-a-windows-server-2003-to-windows-server-2008/
ASKER
Thanks guys.
Yes we are using AD-Integrated.
Moreover, we have two AD-I DNS servers (Windows 2003). We also want to decommission physical servers of Windows 2003 Server that host DNS and DHCP. So when there is a change in IP address, will it effect clients?
Yes we are using AD-Integrated.
Moreover, we have two AD-I DNS servers (Windows 2003). We also want to decommission physical servers of Windows 2003 Server that host DNS and DHCP. So when there is a change in IP address, will it effect clients?
only those which have staticaly set DNS IPs. Firts you have to correct entries before you decomission old 2003 servers. Then you need to update option 003 in your DHCP scope(s)
ASKER
Hmmm... Is it possible that we assign temp IP address to old DNS server and its IP address to new Win 2k8 server?? Then repeat the same step for Secondary DNS server or we can start from Secondary DNS server as well.
You need to move the DHCP server to another machine then change DHCP to point to the new 2008 DNS servers
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ASKER
That's why we want to use old IP address so that we shudn't change IP address on other devices and servers...
Well follow the steps I outlined but you will need to demote the current Domain Controllers.
ASKER
Thanks to all. Let me make a checklist and share with y'all ...