How to Retrieve Subnet and Route Table Information via PowerShell

Question

What are the PowerShell commands to retrieve subnet and route table information from an Azure environment?

Answer 1

1. Retrieve Subnet Information

Get-AzVirtualNetwork | Select-Object -ExpandProperty Subnets

Or, if you want details of a specific subnet:

Get-AzVirtualNetworkSubnetConfig -Name <SubnetName> -VirtualNetwork <VNetObject>

To get all subnets in a specific virtual network:

$vnet = Get-AzVirtualNetwork -Name "<VNetName>" -ResourceGroupName "<ResourceGroupName>"
$vnet.Subnets

2. Retrieve Route Table Information To list all route tables in your Azure subscription:

Get-AzRouteTable

To get details of a specific route table:

Get-AzRouteTable -Name "<RouteTableName>" -ResourceGroupName "<ResourceGroupName>"

To list the routes within a specific route table:

$routeTable = Get-AzRouteTable -Name "<RouteTableName>" -ResourceGroupName "<ResourceGroupName>"
$routeTable.Routes

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hth

Marcin

Answer 2

Hi @Nana Poku,

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

 

# Get all virtual networks in the subscription
$vNets = Get-AzVirtualNetwork


# Loop through each VNet and retrieve its subnets along with route tables
$results = foreach ($vNet in $vNets) {
    foreach ($subnet in $vNet.Subnets) {
        $routeTable = if ($subnet.RouteTable) { 
            Get-AzRouteTable -Name $subnet.RouteTable
        } else { 
            $null 
        }
 
        [PSCustomObject]@{
            VNetName     = $vNet.Name
            VNetRG       = $vNet.ResourceGroupName
            SubnetName   = $subnet.Name
            RouteTable   = if ($routeTable) { $routeTable.Name } else { "None" }
            RouteTableRG = if ($routeTable) { $routeTable.ResourceGroupName } else { "None" }
        }
    }
}


# Display results in a table format
$results | Format-Table -AutoSize

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