Unable to add new subnet in existing virtual network

Question

Hello,

I am adding a new subnet to the existing virtual network but it is showing below error message.

Failed to save subnet 'Subnet Name'. Error: 'Cannot proceed with operation because resource "/subscriptions/07145b12-0ef3-4d56-bc32-d7f44addf/resourceGroups/xyz/providers/Microsoft.Network/virtualNetworkGateways/xyz" used by resource "/subscriptions/07145b12-0ef3-4d56-bc32-d7f44addf/resourceGroups/Virtual network name/providers/Microsoft.Network/virtualNetworks/abc/subnets/abc" is not in Succeeded state. Resource is in Failed state and the last operation that updated /is updating the resource is PutVirtualNetworkGatewayOperation.'

Virtual Network range is : 10.2.0.0/21 multiple subnets are created.

Subnet is already created

10.2.3.0/27

I have tried to add the new subnet mentioned (tried both) below but failed and showing above mentioned error.

10.2.3.32/27

10.2.3.32/28

Can anyone help us why getting this error?

Answer 1

@Rishi Singh ,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

I understand that you are unable to add a subnet to a VNET.

From your error message, it appears,

• There is a VPN Gateway "xyz" deployed into the VNET
• And this VPN Gateway is in a failed state

As next steps,

• You have to first bring the VPN Gateway to a succeeded state
• You can do this by doing a GET and SET Operation on the VPN Gateway, with some minor changes (which you can revert back)

$Gateway = Get-AzVirtualNetworkGateway -ResourceGroupName "<ResourceGroupName>" -Name "<VPNGatewayName>"
Set-AzVirtualNetworkGateway -VirtualNetworkGateway $Gateway -Tag @{ testtagKey="SomeTagKey"; testtagValue="SomeKeyValue" }

The above example adds a tag which you can later remove, once the VPN Gateway goes into a Succeeded state.

Post which, you should be able to add a subnet to the VNET

Kindly let us know how this goes and if you need further assistance on this issue.

Thanks,

Kapil