How to Change the Vnet of a VM

Biswajeet Kumar 46

Hi,

We have created multiple Vnets in Azure. They can communicate with each other using Virtual Network Gateway.We need to change the Vnet of the VM to another one.

How do we do that without deallocating or deleting-recreating the VM?

Thanks

2 answers

Andreas Baumgarten 98,626 Reputation points MVP

2020-10-19T06:12:05.273+00:00
It's not possible to switch a VM between subnets/vnets without deallocating/deleting-recreating.

Easiest way:

Delete the VM but keep the OS Disk.

Deploy a new VM in the new subnet and use the still existing OS Disk.

(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten
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9 people found this answer helpful.
IsTra-9015 96 Reputation points

2022-02-07T23:13:58.627+00:00

That's a pretty miserable way of doing this. Clearly there is need for an enhancement here.

Uday Kiran Reddy (ureddy) 86 Reputation points

2022-03-11T13:54:53.693+00:00

There is no option select the existing disk in portal.

Andreas Baumgarten 98,626 Reputation points MVP

2022-03-11T18:47:28.093+00:00

Hi @Uday Kiran Reddy (ureddy) ,

In the Azure Portal navigate to the Disks, click on the disk in the list, in the Overview page of the disk click on + Create VM .

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten

Uday Kiran Reddy (ureddy) 86 Reputation points

2022-03-15T07:10:58.277+00:00

if it is in different location, then vnet is not showing to select.

Andreas Baumgarten 98,626 Reputation points MVP

2022-03-15T19:49:42.697+00:00

Hi @Uday Kiran Reddy (ureddy) ,

if the disk is in a different location you have to move/copy the disk to the location you want to create the VM in.
https://learn.microsoft.com/en-us/azure/virtual-machines/windows/disks-upload-vhd-to-managed-disk-powershell#copy-a-managed-disk

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten

Ramez Nadem 0 Reputation points

2023-03-18T01:41:31.4533333+00:00

You can change its SUBNET as long as the VM is in the same VNET.

However, if you want to change the VNET, you'll need to redeploy the VM.
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Kasun Rajapakse 351 Reputation points

2020-10-19T06:12:37.897+00:00

Hi,

Why do you create virtual network gateways to connect all the VMs. We can use peering for this it's more easy and reliable. Its not possible to change the VNET without deallocating the VM and deleting the VM.

https://4sysops.com/archives/move-an-azure-vm-to-another-virtual-network-vnet/

Follow the above guide
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1 person found this answer helpful.
Biswajeet Kumar 46 Reputation points

2020-10-19T07:31:52.513+00:00

I was trying to connect the VNets. All the VMs are DCs and part of a Domain, so that if i successfully switch the DC/VM's Vnet, the domain still work.

The Main goal here is to switch the site of DC. Each site is located in different site with different VNets. So to switch the Sites, We needed to switch the Vnets actually.
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How to Change the Vnet of a VM

2 answers