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mimckitt avatar image
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mimckitt asked ·

Trending on MSDN: Unable to change Subnet or add new NIC of new Subnet in new Resource Group

I have a VM in an old Resource Group with Address Space 192.168.0.0/16 and subnet as 192.168.2.0/24. My plan is to move the VM to different Resource Group with a different Subnet of 192.168.3.0/24 so it gets an ip of 192.168.3.5 as per the subnet.


I've created a new Resource Group with Address space 192.168.3.0/24 and subnet as 192.168.3.0/28. After that, I moved VM and its associated NIC and the NSG. I assumed that it will get New IP address range of 192.168.3.0. But the VM's NIC is still showing the old VNET is associated to it on the portal.


I tried following steps to get new Subnet IP's.


Created New NIC of new Subnet with New NSG but cannot attach the same to moved VM. There is no option to change the VNET.


I moved that VNET to new RG but I am still not able to add another NIC from Different VNET.


The Only Solution I see is to Create a new VM in new RG with a new NSG and then SWAP the OS Disk. Or Backup the VM from old VNET and Restore the VM to the new VNET.

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azure-virtual-machinesazure-virtual-machines-networking
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olufemiaMSFT avatar image
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olufemiaMSFT answered ·

Welcome to the Microsoft Q&A (Preview) platform. Happy to answer your questions.

When you move the VM to another resource group, the VNET is not changed. Your VM still connected to that VNET where it is initially deployed.
Resource Group is just a container where you can deploy resources. Those resources can be in the same region or may be of different region. But in your case when you tried to change the VM to a different Resource Group, your VM is still linked to the same VNET and hence you are not allowed to attach NIC which is from a different VNET.
As you mentioned, the only way is to delete the VM and create a new VM in different VNET in different RG as you desired.

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