Add a NIC in Azure with Powershell

First at all, log in Azure

Login-AzureRmAccount

Choice the subscription to use and declare the variables

Select-AzureRmSubscription –SubscriptionId <id_of_your_subscription>

$VMname = ‘VMName’

$VMRG = ‘ResourceGroupName’

$NICName = ‘NICName’

$NICResourceGroup = ‘NICResourceGroupName’

Get the VM

$VM = Get-AzureRmVM -Name $VMname -ResourceGroupName $VMRG

Add the second NIC

$NewNIC = Get-AzureRmNetworkInterface -Name $NICName -ResourceGroupName $NICResourceGroup

$VM = Add-AzureRmVMNetworkInterface -VM $VM -Id $NewNIC.Id

Show Network interfaces

$VM.NetworkProfile.NetworkInterfaces

We have to set one of the NICs to Primary, I will set the first NIC in this example

$VM.NetworkProfile.NetworkInterfaces.Item(0).Primary = $true

Update the VM configuration (The VM will be restarted)

Update-AzureRmVM -VM $VM -ResourceGroupName $VMRG