![]() ![]() You should now have your new DHCP scope:Īfter this you need to change the subnetmask of all devices with fixed IP-addresses: In most cases, you can delete the areas with “classes”, “filter” and “options. Always use the full range, we will configure excluderanges at the start and the end of the subnet: net dhcp server \\Puck Scope 192.168.0.0 Add iprange 192.168.0.1 192.168.3.254 Your subnet also needs to be replaced in the txt file, so press Control H again to replace “192.168.2.0” to “192.168.0.0”.Īfter this, we need to manually change the iprange and excluderange (PUCK is my test-server ? ). ![]() First we will export the Microsoft DHCP settings with this command (reserved-IPs are also getting exported): netsh dhcp server dump all > c:\dhcp.txtĭelete your current DHCP scope and open the txt file with notepad, press Control H and replace “Dhcp Server” with “netsh dhcp server”. I suggest this online calculator: For example: Keep in mind that you need to plan it right, because there are cases where you go up or down in your subnet-id. ![]() The easiest way is to extend your current network, so you don’t have to change all of your devices. I want to show you how easy it is and what you have to keep in mind. Sometimes a /24 subnet is running out of free usable IP addresses and we need to extend the network. ![]()
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