functions/Get-AzSMEmptySubnets.ps1
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function global:Get-AzSMEmptySubnets { <# .SYNOPSIS Lists empty subnets in a subscription. .DESCRIPTION Lists empty subnets in a subscription. .PARAMETER SubscriptionID Azure subscription ID in the format, 00000000-0000-0000-0000-000000000000 .PARAMETER ResourceGroupName A single Azure resource group name to scope query to .OUTPUTS Selected.Microsoft.Azure.Commands.Network.Models.PSVirtualNetwork .EXAMPLE Get-AzSMEmptySubnets -Subscription 00000000-0000-0000-0000-000000000000 Get a list of unused subnets in a subscription. .EXAMPLE * .NOTES * * .LINK #> [CmdletBinding( DefaultParameterSetName='SubscriptionID', ConfirmImpact='low' )] param( [Parameter(Mandatory=$true)][string] $SubscriptionID, [Parameter(Mandatory=$false)][string] $ResourceGroupName ) $null = Set-AzContext -SubscriptionId $SubscriptionID Write-Debug ('Subscription: {0}' -f $SubscriptionID) if ($ResourceGroupName.Length -gt 0) { $vn=Get-AzVirtualNetwork -ResourceGroupName $ResourceGroupName } else { $vn=Get-AzVirtualNetwork } $emptysubnets=$vn|Where-Object{$_.Subnets.IpConfigurations.count -eq 0}|select-object @{n="VNet";e="Name"},Subnets Return $emptysubnets } Export-ModuleMember -Function Get-AzSMEmptySubnets |