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JimGoyette-1110 asked DSPatrick commented

Disk2VHD DC DNS Issue

I have migrated a WIndows Server 2008 DC to Hyper-V and everything works except DNS. Initial boot of VM used DHCP and when I change the IP address back to what it was before migration I lose internet connectivity. DNS under the DHCP IP address boot only uses IPv6 not the IPv4 DHCP address (properties in DNS Manager). How do I "fix" DNS to use the static IP address the server previously had? FYI, This is a secondary DC / DNS machine and could be demoted if that is the solution.

windows-server-hyper-vwindows-dhcp-dns
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DSPatrick avatar image
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DSPatrick answered DSPatrick commented

The much safer / cleaner method to virtualize a domain controller is to stand up a new one from clean installation media in virtual environment, patch fully and migrate. P2V methods are a very risky last resort.

I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting any operations. Then stand up the new 2008, patch it fully, license it, join existing domain, add active directory domain services, promote it also making it a GC (recommended), transfer FSMO roles over (optional), transfer pdc emulator role (optional), use dcdiag / repadmin tools to again verify health, when all is good you can decommission / demote old one and re-ip the new one if necessary.


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Just checking if there's any progress or updates?

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Standing up a new vm and demoting existing was not an option. Regardless, thank you for the procedure.
Problem was the Name Server entry in DNS manager was present for the server but had no IP address. Once I corrected that things were fine.





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Standing up a new vm and demoting existing was not an option.

Not sure what is meant.

thank you for the procedure.

You're welcome.


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