Server 2012 R2 Hyper-V - Change IP Subnet

We have a Windows 2012 R2 Hyper-V Host with 2 Windows 2012 R2 Guests. One of the Hyper-V guest is Domain Controller.
We need to change the Subnet and IP of Hyper-V Guests and Host from Class C to Class B. How do I change Hyper-V Guest IP's without loosing connectivity and locking myself out with Host?
I do have an understanding of possible issues relating to changing DC IP. I do not know best approach/practice to do this in Hyper-V environment. Any insight would be much appreciated.
Thank you!
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Are all 3 servers on the same subnet?
In any case it seems a routing problem, if your switches are able to route network communication between the old and the new subnets I do not see any problem.

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atsandersAuthor Commented:
Thanks for taking the time to respond. I was making this more complicated than it was. My understanding/experience with Hyper-V is VERY limited. I can use RDP after changing DC to perform necessary changes. Thanks for the support!
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