How To Modify An Existing DHCP Scope and Subnet

Introduction After combing through a lot of tutorials and poorly written how-to's I felt compelled to create a step-by-step tutori...

Introduction

After combing through a lot of tutorials and poorly written how-to's I felt compelled to create a step-by-step tutorial of how to change a DHCP scope. In my situation, the subnet mask was entered incorrectly and needed to be adjusted. This was the only scope in the DHCP.

Steps (8 total)

1

CMD: netsh dhcp server \\”Server name” scope “scope subnet” dump>c:\dhcp.txt

2

Modify the txt file with the correct DHCP scope and Subnet Mask by replacing any incorrect entries. Save it.

3

Go into Services and STOP both DHCP client and Server services.

4

Navigate to C:\Windows\System32\DHCP and rename both the "dhcp.pat" and "dhcp.mbd" files to .old

5

Restart both DHCP client and Server services.

6

CMD: netsh exec c:\dhcp.txt

7

Open the DHCP admin tool and verify the scope is correct.

8

Restart both DHCP services again to verify functionality.