Script for DHCP Scope

Question

I want to add our new dhcp scope for around 2000 IPs, so I want any script for even apps that help me to do that, something that get my IP address from txt file and automatically insert and make my scope,

I heard that there is scripting to do this, Is there any script for doing this?

Answer 1

Use Powershell. You'll want to look at the ".." range operator, and have a look at the Net-SubnetMath.ps1 functions by Chris Dent.

Your goal is to have PowerShell output a batch file with the needed netsh.exe commands; here's an example to create 3 host reservations:

netsh dhcp server \\DC scope 10.0.0.0 add reservedip 10.1.1.1 1234567890ab hostname1
netsh dhcp server \\DC scope 10.0.0.0 add reservedip 10.1.1.2 1234567890ac hostname2
netsh dhcp server \\DC scope 10.0.0.0 add reservedip 10.1.1.3 1234567890ad hostname3

The Net-SubnetMath functions are useful for calculating IP address lists when you need something more than just a +1 increment. Here's an example where I needed to calculate a list of IPV4 addresses that incremented by 32:

Take your starting IP address, call the ConvertTo-DecimalIP function, and stuff it in the variable $a :

$a = ConvertTo-decimalIP 10.128.42.125

Then, loop adding 32 to the address each time. Write the output as dotted decimal:

for ($i=0; $i -lt 512; $i+=32) {ConvertTo-DottedDecimalIP ($a + $i)}

10.128.42.125
10.128.42.157
10.128.42.189
...

You can use this technique to very rapidly create the framework of DHCP scopes, and to insert whatever options are appropriate for that scope; just loop it as many times as you need.

Answer 2

Your question isn't particularly clear. However, if your using Win2k3/Win2k8, you can script DHCP with NETSH.EXE. If you can clarify exactly what you're trying to do, I can provide an example.