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How to use DHCP Server Locator Utility

DHCPLOC.exe is a useful tool that can display the DHCP servers active on the subnet. If it detects any unauthorized DHCP servers, it beeps and sends out alert messages. It can also   determine which DHCP servers are available to a DHCP client and to detect unauthorized DHCP servers on a subnet.

For example, to check the DHCP in your subnet, run this command:

C:\>dhcploc 10.0.1.2
Type d - to discover; q - to quit; h - for help.
21:09:29 OFFER (IP)10.0.6.58 (S)10.0.0.17 ***
21:09:29 OFFER (IP)10.0.1.1 (S)10.0.0.18 ***

10.0.1.2 is the computer IP address that is assigned by DHCP. You must run this command on a DHCP client.

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