Functions/Find-AHDuplicateSubnets.ps1
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<#
.SYNOPSIS Find-AHDuplicateSubnets - Find duplicate subnets in all VNets .DESCRIPTION Find-AHDuplicateSubnets - Find duplicate subnets in all VNets .EXAMPLE Find-AHDuplicateSubnets .PARAMETER AllSubscriptions Find duplicate subnets in all VNets in all subscriptions #> Function Find-AHDuplicateSubnets { [CmdletBinding()] param ( [Parameter()] [switch] $AllSubscriptions ) $SummarizeSubnetsUsedInAllVNets = { $subscriptionName = (Get-AzContext).subscription.Name $VNets = (Get-AzVirtualNetwork) $SubnetsUsedInAllVNets = @() foreach ($VNet in $VNets) { $SubnetsUsedInthisVNet = Get-AzVirtualNetwork -Name $VNet.Name | Get-AzVirtualNetworkSubnetConfig $SubnetsUsedInAllVNets += [pscustomobject]@{ SubscriptionName = $subscriptionName vNet = $VNet.Name vNetAddressSpaces = $vnet.AddressSpace.AddressPrefixes -join (';') subnet = $SubnetsUsedInthisVNet.AddressPrefix -join (';') #$subnet } } $SubnetsUsedInAllVNets } $Summary = Invoke-AzureCommand -ScriptBlock $SummarizeSubnetsUsedInAllVNets -AllSubscriptions:$AllSubscriptions $allSubnets = $summary.subnet | ForEach-Object { $_.split(';') } $AnalyzedSummary = $Summary | ForEach-Object { $subnetCheck = ForEach ($subnet in $_.subnet.split(';')) { If (($allSubnets | Where-Object { $_ -eq $subnet }).count -gt 1) { "$($_.SubscriptionName) - $($_.vNet) - $subnet" }else {} } [pscustomobject]@{ SubscriptionName = $_.SubscriptionName vNet = $_.vNet vNetAddressSpaces = $_.vNetAddressSpaces subnet = $_.subnet DuplicatedInVNet = $subnetCheck -join (';') #If($subnetCheck.contains($true)){$true}else{$false} } } $AnalyzedSummary # | ft -autosize } |