Change IP address on the port script - powershell

Question

I need a script to change the IP address on all Windows 7 pro X64 PC.
If the first 2 match 192.168 then change
If IP already change then ignore and move onto next ip/PC.
Some PC will have more then 1 port.
I have try this which works but when you run it next time it keep adding the ip address.
$site = #{
Site1 = 2;
site2 = 3;
}
$site = $site.Values
$oldRange = "192.168."
foreach ($s in $site) {
$ipAddress = $oldRange + $s + ".*"
$printer = wmic path win32_tcpipprinterport get hostaddress
$printer = $printer.Split('',[System.StringSplitOptions]::RemoveEmptyEntries)
if ($printer) {
foreach ($p in $printer) {
$OldIP = $p
$OldIP2 = $OldIP -replace $oldRange, ""
$old = [bool]($OldIP -as [IPAddress])
if ($old) {
$NewIP = "172.15.$OldIP2"
$NewIP
wmic path win32_tcpipprinterport where "hostaddress = '$OldIP'" set hostaddress="$NewIP"
}
}
} else {
Write-Host "None Found"
}
}

Answer 1

This is what I have done.
if anyone has better solution then please let me know
Clear-Host
$site = #{
Site1=2;
Site2=3;
}
$site =$site.Values
$oldRange = "172.11."
foreach($s in $site)
{
$printer = wmic path win32_tcpipprinterport get hostaddress
$printer=$printer.Split('',[System.StringSplitOptions]::RemoveEmptyEntries)
if($printer)
{
foreach ($p in $printer)
{
$OldIP = $p
$OldIP2 = $OldIP -replace $oldRange, ""
$old = [bool]($OldIP -as [IPAddress])
if($old)
{
$sep = $OldIP.lastindexof(".")
$network = $OldIP.substring(0,$sep)
if("10.11."+$s -ne $network)
{
$NewIP = "10.11.$OldIP2"
$NewIP
wmic path win32_tcpipprinterport where "hostaddress = '$OldIP'" set hostaddress="$NewIP"
}else{
Write-Host "IP Already Changed"
}
}else
{
Write-Host "Not a IP address"
}
}
}else{
Write-Host "None Found"
}
}