How to list used IP address in azure

Question

I've been tasked with finding the total number of IPs used on a Vnet, but so far, I haven't found a solution. Has anyone encountered this requirement before or have experience dealing with it? Your insights would be greatly appreciated

Answer 1

@kedar giri ,

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

I understand that you would like to find the total number of IPs used on a Vnet.

The below Powershell script should help you :

# Get the VNet
$resourceGroupName = "<RG Name>"
$virtualNetworkName = "<VNET Name>"
$virtualNetwork = Get-AzVirtualNetwork -Name $virtualNetworkName -ResourceGroupName $resourceGroupName


#Overall VNET values
$TotalUsedIPAddresses=0
$TotalAvailableIPAddresses=0

#Loop through the VNet for individual Subnets

foreach ($subnet in $virtualNetwork.Subnets)
{
$subnetMask = $subnet.AddressPrefix.Split("/")[1]
$netmaskLength = [Math]::Pow(2, 32 - [int]$subnetMask)
$availableIpAddresses = $netmaskLength - 5 - $subnet.IpConfigurations.Count
Write-Host "Subnet Name: " $subnet.Name
Write-Host "Address Range: " $subnet.AddressPrefix
Write-Host "Total usable IP Addresses in this Subnet: " ($netmaskLength - 5)
Write-Host "Used IP Addresses: " $subnet.IpConfigurations.Count
Write-Host "Available IP Addresses: " $availableIpAddresses
Write-Host "`n"


#Sum Overall VNET values
$TotalUsedIPAddresses = $TotalUsedIPAddresses + $subnet.IpConfigurations.Count
$TotalAvailableIPAddresses = $TotalAvailableIPAddresses + $availableIpAddresses

}


#Display Overall VNET values
Write-Host "TotalUsedIPAddresses: " $TotalUsedIPAddresses
Write-Host "TotalAvailableIPAddresses: " $TotalAvailableIPAddresses

• This lists the "Used IP Addresses" and "Available IP Addresses" grouped by subnet.
• Then adds the individual subnet's values throughout the loop to arrive at the overall VNET values.

Please let us know if we can be of any further assistance here.

Thanks,

Kapil

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