Azure site-to-site VPN through powershell script

#Author : Neeraj (neerajvayu123@gmail.com)- please give credit to the author if it helped you

Please carefully go through the code and run part by part like i did
1.PartA, 2.PartB, 3.PartC, 4.PartD
If you will not run like this you may face some other issue, let me know if you face any issue at any step
This script is tested and fully working , after a lot of failed attempt finally i made a working version
Note: I have not included login steps in this script so pls take care of that
#PART A
#create a gateway subnet for myvnet
$rsgrp=Get-AzureRmResourceGroup -name 'MyRSGroup'
$GWIPName1 = "myvnetIP"
#gateway public ip
$gwpip1 = New-AzureRmPublicIpAddress -Name $GWIPName1 -ResourceGroupName $rsgrp.ResourceGroupName `
-Location EastUS -AllocationMethod Dynamic
$GWSubName1 = "GatewaySubnet"
$GWSubPrefix1 = "https://www.linkedin.com/redir/invalid-link-page?url=192%2e168%2e3%2e0%2F24"
#gateway configuration
$vnet1 = Get-AzureRmVirtualNetwork -Name myvnet -ResourceGroupName $rsgrp.ResourceGroupName
Add-AzureRmVirtualNetworkSubnetConfig -name $GWSubName1 -AddressPrefix $GWSubPrefix1 -VirtualNetwork $vnet1
set-azurermvirtualnetwork -VirtualNetwork $vnet1
#assigning newer value to the vnet1 is mandatory else it will take old subnets
$vnet1 = Get-AzureRmVirtualNetwork -Name myvnet -ResourceGroupName $rsgrp.ResourceGroupName
$subnet1 = Get-AzureRmVirtualNetworkSubnetConfig -Name "GatewaySubnet" -VirtualNetwork $vnet1
$GWIPconfName1 = "gwipconf1-myvnet"
$gwipconf1 = New-AzureRmVirtualNetworkGatewayIpConfig -Name $GWIPconfName1 `
-Subnet $subnet1 -PublicIpAddress $gwpip1
#create gateway
$GWName1 = "myvnetGW"
New-AzureRmVirtualNetworkGateway -Name $GWName1 -ResourceGroupName $rsgrp.ResourceGroupName `
-Location EastUS -IpConfigurations $gwipconf1 -GatewayType Vpn `
-VpnType RouteBased -GatewaySku VpnGw1
#PART C
$GWName1 = "myvnetGW"
$rsgrp=Get-AzureRmResourceGroup -name 'MyRSGroup'
$vnet1gw = Get-AzureRmVirtualNetworkGateway -Name $GWName1 -ResourceGroupName $rsgrp.ResourceGroupName
$Connection14="myvnet-to-vpn3net"
$rsgrp=Get-AzureRmResourceGroup -name 'MyRSGroup'
New-AzureRmVirtualNetworkGatewayConnection -Name $Connection14 -ResourceGroupName $rsgrp.ResourceGroupName `
-VirtualNetworkGateway1 $vnet1gw -VirtualNetworkGateway2 $vnet4gw -Location 'East Us' `
-ConnectionType Vnet2Vnet -SharedKey 'AzureA1b2C3'
#######################################################
#PART B
#create a gateway subnet for vpn3net
$rsgrp=Get-AzureRmResourceGroup -name 'vpn-3'
$GWIPName1 = "vpn3netIP"
#gateway public ip
$gwpip1 = New-AzureRmPublicIpAddress -Name $GWIPName1 -ResourceGroupName $rsgrp.ResourceGroupName `
-Location 'Central US' -AllocationMethod Dynamic
$GWSubName1 = "GatewaySubnet"
$GWSubPrefix1 = "https://www.linkedin.com/redir/invalid-link-page?url=172%2e16%2e2%2e0%2F24"
#gateway configuration
$vnet1 = Get-AzureRmVirtualNetwork -Name vpn3net -ResourceGroupName $rsgrp.ResourceGroupName
echo "adding subnet"
Add-AzureRmVirtualNetworkSubnetConfig -name $GWSubName1 -AddressPrefix $GWSubPrefix1 -VirtualNetwork $vnet1
echo "setting vnet"
set-azurermvirtualnetwork -VirtualNetwork $vnet1
#assigning newer value to the vnet1 is mandatory else it will take old subnets
$vnet1 = Get-AzureRmVirtualNetwork -Name vpn3net -ResourceGroupName $rsgrp.ResourceGroupName
$subnet1 = Get-AzureRmVirtualNetworkSubnetConfig -Name "GatewaySubnet" -VirtualNetwork $vnet1
$GWIPconfName1 = "gwipconf1-vpn3net"
echo "creating gateway ip config"
$gwipconf1 = New-AzureRmVirtualNetworkGatewayIpConfig -Name $GWIPconfName1 `
-Subnet $subnet1 -PublicIpAddress $gwpip1
echo "creating gateway device"
#create gateway
$GWName1 = "vpn3netGW"
New-AzureRmVirtualNetworkGateway -Name $GWName1 -ResourceGroupName $rsgrp.ResourceGroupName `
-Location 'Central US' -IpConfigurations $gwipconf1 -GatewayType Vpn `
-VpnType RouteBased -GatewaySku VpnGw1 -Verbose
#PART D
$GWName1 = "vpn3netGW"
$rsgrp=Get-AzureRmResourceGroup -name 'vpn-3'
$vnet4gw = Get-AzureRmVirtualNetworkGateway -Name $GWName1 -ResourceGroupName $rsgrp.ResourceGroupName
$Connection41="vpn3net-to-myvnet"
$rsgrp=Get-AzureRmResourceGroup -name 'vpn-3'
New-AzureRmVirtualNetworkGatewayConnection -Name $Connection41 -ResourceGroupName $rsgrp.ResourceGroupName `
-VirtualNetworkGateway1 $vnet4gw -VirtualNetworkGateway2 $vnet1gw -Location 'Central US' `
-ConnectionType Vnet2Vnet -SharedKey 'AzureA1b2C3'