The task can broken in 6 parts
- parse dhcpd.conf on the DHCP server (Linux)
- import the parsed file to your *new* DHCP server
- setup DHCP role on *new*server
- run a script on the *new* DHCP server which creates scopes,pools and reservations (Windows) according to the parsed file.
- manually rename the scopes to "friendly" names
- manually set the server,scope and/or reservation options and scope lease times
get this great AWK parser onto the Debian box https://gist.github.com/mattpascoe/4039747
make it executable
chmod +x dhcpparse.awk
parse the file
cat /etc/dhcp/dhcpd.conf | dhcpparse.awk > dhcp-config.txt
Import the parsed file to your Windows Server
have a look at it to remove errors.
Setup DHCP role on Windows Server
skipping this part as it's pretty self explanatory
Run script
You will need this Powershell module , referred to as "Microsoft.DHCP.Powershell.Admin.psm1" in the script. If Window Server is version 2012 R2 , I guess you can use the DHCP server cmdlets from Microsoft instead.
You will also need to make a Powershell module -which is a combination of this function and this function. Just add one function under the other and put the line "export-modulemember IsIpAddressInRange,Get-IPrange". This module is referred as "IPutil.psm1"
Import-Module .\Microsoft.DHCP.Powershell.Admin.psm1
Import-Module .\IPutil.psm1
#Group by line types
$subnets = Select-String -Pattern 'subnet' -Path .\dhcp-config.txt |%{$_.Line}
$pools = Select-String -Pattern 'pool' -Path .\dhcp-config.txt | %{$_.Line}
$hosts = Select-string -Pattern ‘host’ -path .\dhcp-config.txt |%{$_.Line}
#Create scopes
$scopes = $subnets |%{$l=$_.Split(','); New-DHCPScope -Server $env:COMPUTERNAME -Address $l[1] -SubnetMask $l[2] -Name $l[3]}
foreach ($scope in $scopes)
{
# generate all the IP addresses in this scope
$ips=Get-IPrange -ip $scope.Address -mask $scope.SubnetMask
# Create pools
Write-host "Creating pool(s) for " $scope.Address
foreach ($line in $pools)
{
if($ips -contains $line.split(',')[1])
{
Add-DhcpIPRange -scope $scope -startaddress $line.split(',')[1] -endaddress $line.split(',')[2]
}
}
# Create reservations
Write-host "Creating reservation(s) for " $scope.Address
foreach ($line in $hosts)
{
if($ips -contains $line.split(',')[1])
{
New-DHCPReservation -scope $scope -IPAddress $line.split(',')[1] -MACAddress $line.split(',')[2] -Description $line.split(',')[4]
}
}
}
Write-host “You should now rename the scopes to friendly names”
Write-host “You should manually set options and lease times"
