Tuesday, July 24, 2012

Programming DHCP via NETSH


If you need to configure more than two subnets on a Windows 2008 R2 DHCP server (Or all versions later), doing via the GUI is a painful way to do it.

Here's a simple cut and paste script that you can run via netsh that will make the subnets much quicker.

Launch netsh from the command line, and paste this in:

Replace 10.1.0.50 with your DHCP server, and 10.2.0.224 with your Scope's Network (check the subnet mask and the IP range) 

Just repeat each section below for each subnet.  I find it easy to just use find and replace to make lots of these.

Dhcp Server \\10.1.0.50 add scope 10.2.0.224 255.255.255.224 "Name of the Subnet" "Description of Subnet"
Dhcp Server \\10.1.0.50 Scope 10.2.0.224 set state 1
Dhcp Server \\10.1.0.50 Scope 10.2.0.224 set delayoffer 0


# ===============================================================
# Start Add Ipranges to the Scope 10.2.0.224, Server 10.1.0.50
# ===============================================================

Dhcp Server \\10.1.0.50 Scope 10.2.0.224 Add iprange 10.2.0.226 10.2.0.254
Dhcp Server \\10.1.0.50 scope 10.2.0.224 set napstate Off
#================================================================
# End Add Ipranges to the Scope 10.2.0.224, Server 10.1.0.50
#================================================================
#================================================================
# Start Add OptionValues to the Scope : 10.2.0.224, Server : 10.1.0.50
#================================================================
Dhcp Server \\10.1.0.50 Scope 10.2.0.224 set optionvalue 51 DWORD "691200"
Dhcp Server \\10.1.0.50 Scope 10.2.0.224 set optionvalue 3 IPADDRESS "10.2.0.225"
#================================================================
# End Add OptionValues to the Scope : 10.2.0.224, Server : 10.1.0.50
#================================================================
#================================================================
# Start Add ReservedIp to the Scope : 10.2.0.224, Server : 10.1.0.50
#================================================================
Dhcp Server \\10.1.0.50 Scope 10.2.0.224 Add reservedip 10.2.0.235 001122334455 "Name of Reserved  "Description of Reserved" "DHCP"
Dhcp Server \\10.1.0.50 v4 Scope 10.2.0.224 Set NameProtection enable= 0
Dhcp Server \\10.1.0.50 Scope 10.2.0.224 Set DnsConfig 1 1 1 1
#================================================================
# End Add ReservedIp to the Scope : 10.2.0.224, Server : 10.1.0.50
#================================================================


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