Export-SCNetworkConfig.ps1

<#

.SYNOPSIS
This script is intended to export SCVMM network configuration.

.DESCRIPTION
The script lists every logical networks and dependencies such as vm networks and sites from a SCVMM server and exports the results as a .ps1 file so it can be replay 
on a new SCVMM server. The script can be run from the powershell console of the SCVMM console or from a computer with the VirtualMachineManager already loaded and with
an access to the SCVMM server. Just use the Get-SCVMMServer beforehand with a user with sufficient permissions.

.EXAMPLE
"./Export-SCNetworkConfig.ps1" -Output "C:\Import-SCVNetworkConfig.ps1"

.INPUTS
Output : Filepath to the script which will be use to import resultas in the new scvmm server.

.COMPONENTS
Import-Module VirtualMachineManager

.NOTES
Written by : Lucas Bablon
Version : 1.0
Link : https://github.com/lbablon
    
#>

#required components
#requires -Module virtualmachinemanager

#params
param 
(
    [Parameter(Mandatory=$false, HelpMessage="Save the results in a .ps1 script")]
    [string]$output=".\Import-SCNetworkConfig.ps1"
)

##
##SCRIPT
##

#initialize the output file
Write-Output "<#" | Out-File $output -Append
Write-Output "`n.SYNOPSIS" | Out-File $output -Append
Write-Output "`nThis script is intended to import network configuration on a SCVMM server." | Out-File $output -Append
Write-Output "`n.DESCRIPTION" | Out-File $output -Append
Write-Output "`nThis script was automatically generated by Export-SCVNetworkConfig.ps1. Run the import script from the SCVMM console of the server you want to import in." | Out-File $output -Append
Write-Output "`n#>" | Out-File $output -Append

Write-Output "`n#required components" | Out-File $output -Append
Write-Output "#requires -Module virtualmachinemanager" | Out-File $output -Append

Write-Output "`n#script" | Out-File $output -Append

#list all logical networks
$logicalNetworks = Get-SCLogicalNetwork | select -first 5

Write-Host "Exporting creation commands to $output..."

#foreach logical network found export sites and vm networks
$i=1

$logicalnetworks | % {

    $logicalNetwork = $_
    $logicalNetworkname = $logicalNetwork.Name

    #progress bar
    $completed=[math]::round(($i/$logicalNetworks.count)*100)
    Write-Progress -Activity "Exporting configuration" -Status "$completed% complete" -PercentComplete $completed
    Start-Sleep -Seconds 3
    $i++

    #Logical network creation commands are written in the output file
    Write-Output "`n#Creates logical network $logicalNetworkname" | Out-File $output -Append
    $print = 'New-SCLogicalNetwork -Name '+$logicalnetworkname+' -LogicalNetworkDefinitionIsolation $true -EnableNetworkVirtualization $false -UseGRE $false -IsPVLAN $false'
    Write-Output $print | Out-File $output -Append

    #foreach logical network found, list all sites and their configuration
    $sites = Get-SCLogicalNetworkDefinition -LogicalNetwork $logicalNetwork

    $sites | % {

        $site = $_
       
        $sitename = $site.name
        $subnet = $site.SubnetVLans.Subnet
        $vlan = $site.SubnetVLans.VlanID
        $hostgroup = $site.HostGroups.Name

        #Network sites creation commands
        Write-Output "`n#Creates network site $sitename for logical network $logicalNetworkname" | Out-File $output -Append

        $print = '$allSubnetVlan = @()'
        write-output $print | Out-File $output -Append

        $print = '$allSubnetVlan += New-SCSubnetVLan -Subnet '+$subnet+' -VLanID '+$vlan
        write-output $print | Out-File $output -Append

        $print = 'New-SCLogicalNetworkDefinition -Name '+$sitename+' -LogicalNetwork '+$logicalNetwork+' -VMHostGroup '+$hostgroup+' -SubnetVLan $allSubnetVlan -RunAsynchronously'
        Write-output  $print | Out-File $output -Append
      
        
        #VM Networks creation commands
        Write-Output "`n#Creates VM Network for site $sitename" | Out-File $output -Append
        
        $print = '$vmNetwork = New-SCVMNetwork -Name '+$sitename+' -LogicalNetwork '+$logicalNetwork+' -IsolationType VLANNetwork'
        write-output $print | Out-File $output -Append
        
        $subnetVLANs = @()
        $subnetVLANv4 = New-SCSubnetVLan -Subnet $subnet -VLanID $vlan
        $subnetVLANs += $subnetVLANv4

        $print = '$logicalNetworkDefinition = Get-SCLogicalNetworkDefinition -name '+$sitename
        write-output  $print | Out-File $output -Append

        $print = 'New-SCVMSubnet -Name '+$sitename+' -LogicalNetworkDefinition '+$logicalNetworkDefinition+' -SubnetVLan $subnetVLANs -VMNetwork '+$vmNetwork
        write-output  $print | Out-File $output -Append

    }

}