Dmitry Ivakin – Windows Server, Hyper-V, System Center, Powershell, Azure…

Here is the network interface configuration script, which doing the following tasks:

• checking the range of IP address and configuring gateway, mask accoring it’s range. If IP address out of range, the script will end.
• Configure DNS suffix and DNS servers
• Configure IP settings on selected network adapter

#.1.0 subnet gw
$ip_gw_1_0_subnet="192.168.1.1"
#.2.0 subnet gw
$ip_gw_2_0_subnet="192.168.2.1"

#dns settings
$ip_dns_1="192.168.1.2"
$ip_dns_2="192.168.1.3"
$ip_DNS_Suffix = "adatum.local"

#function to compare IP address within the range
function IsIpAddressInRange {
param(
 [string] $ipaddress,
 [string] $begin_range,
 [string] $end_range
)

$ip = [system.net.ipaddress]::Parse($ipAddress).GetAddressBytes()
 [array]::Reverse($ip)
 $ip = [system.BitConverter]::ToUInt32($ip, 0)

$from = [system.net.ipaddress]::Parse($begin_range).GetAddressBytes()
 [array]::Reverse($from)
 $from = [system.BitConverter]::ToUInt32($from, 0)

$to = [system.net.ipaddress]::Parse($end_range).GetAddressBytes()
 [array]::Reverse($to)
 $to = [system.BitConverter]::ToUInt32($to, 0)

$from -le $ip -and $ip -le $to

}

Write-Host "Configuring network interface"
Write-Host ""
Write-Host "List all available interfaces"
$NIC = get-wmiobject win32_networkadapter -filter 'netconnectionstatus = 2'
$NIC | select name, InterfaceIndex | Out-host

#get response from user to select NIC index
$int_id=read-host "Enter interface index to configure: "
#Current IP configuration
Write-Host "Current IP address " (Get-NetIPAddress -InterfaceIndex $int_id -AddressFamily IPv4)
$ip_addr=read-host "Enter IP address: "

#remove old IP address and gw if they already exist
Remove-NetIPAddress((Get-NetIPAddress -InterfaceIndex $int_id).IPAddress) -Confirm:$false

if (Get-NetIPConfiguration | where {$_.IPv4DefaultGateway -ne $null})
{
Remove-NetRoute -InterfaceIndex $int_id -Confirm:$false
}

#Configure IP address
if (IsIPAddressInRange $ip_addr "192.168.1.1" "192.168.1.254")
 {
 New-NetIPAddress -interfaceIndex $int_id -IPaddress $ip_addr -PrefixLength 24 -DefaultGateway $ip_gw_1_0_subnet > $null 
 }

#If you need to do more check, add "elseif"

elseif (IsIPAddressInRange $ip_addr "x.x.x.x" "x.x.x.x")
 {
 New-NetIPAddress -interfaceIndex $int_id -IPaddress $ip_addr -PrefixLength 24 -DefaultGateway $ip_gw_2_0_subnet > $null
 }

else 
 {
 Write-Host "You've entered IP address which is out of range. Please restart this script" -ForegroundColor Red
 exit
 }
 
#Configure DNS servers
Set-DnsClientServerAddress -interfaceIndex $int_id -ServerAddresses $ip_dns_1, $ip_dns_2

#set primary DNS suffix
Write-Host "Setting up DNS servers and primary DNS suffix to qualityserver.de"
Set-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\" -Name Domain -Value $ip_dns_suffix
Set-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\" -Name "NV Domain" -Value $ip_dns_suffix

To run this script on Windows 2012 R2 server, you have to modify it a little bit

Write-Host "Configuring network interface"
Write-Host ""
Write-Host "List all available interfaces"
get-wmiobject win32_networkadapter -filter "netconnectionstatus = 2" | select netconnectionid, name, InterfaceIndex, netconnectionstatus

#get response from user to select NIC index
$int_id=read-host "Enter interface index to configure: "
#Current IP configuration
Write-Host "Current IP address " (Get-NetIPAddress -InterfaceIndex $int_id -AddressFamily IPv4)
$ip_addr=read-host "Enter IP address: "

#remove old IP address and gw if they already exist
Remove-NetIPAddress((Get-NetIPAddress -InterfaceIndex $int_id).IPAddress) -Confirm:$false

if (Get-NetIPConfiguration | where {$_.IPv4DefaultGateway -ne $null})
{
Remove-NetRoute -InterfaceIndex $int_id -Confirm:$false
}