Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
9,044 questions
You may add another private ip address to the NIC
How do I properly change the private ip address of an Azure vm running windows?
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Scott Minar
6
Reputation points
I am working on a project to change a few 2012 domain controllers over to 2019 domain controllers but they must keep the same ip address. Azure will not allow you to assign the same ip address as another vm, and I've had issues changing the static private ip address in Azure. Sometimes I lose rdp connection on the test vm's and dont regain connectivity. What is the best way to replace an aging server in Azure with a newer OS and still keep the same ip address? Keep in mind, these are windows domain controllers so that complicates things a bit.
Azure Virtual Machines
2 answers
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TravisCragg-MSFT 5,696 Reputation points Microsoft Employee Moderator2021-10-15T23:50:17.627+00:00 Unfortunately I cannot advise from the AD perspective, only from the Azure perspective.
Changing the Private IP of a VM (or even setting the private IP allocation type (static / dynamic) will reset the VM. The best way to change the IP is to stop the VM (wait for the VM to be in the stopped (deallocated) state), go to the NIC of the VM and change the IP (and set to static if you want to keep that IP, and then start the VM.
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Scott Minar 6 Reputation points
2021-10-16T00:45:38.02+00:00 Thanks Travis. To be more specific, I have 2 vms that need to "swap" ip addresses with each other, however, azure will not allow me to assign a new ip that is already assigned to another vm. I tried adding another nic to both vms, then I removed the original assigned nics. This method allowed me to then try to assign the ip to the other vm, which eventually worked, but was not reliable in my testing environment. If I have to use this method to get this accomplished, that's fine, but I feel like there is probably a better way to do this.
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Devaraj G 2,096 Reputation points Volunteer Moderator2021-10-17T10:52:10.58+00:00 Hi Scott, unfortunately there is no other documented procedures for this. I think what your already following is more a close solution.
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