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FIX: DHCP doesn’t work

why is the dhcp not working?

1. A DHCP server can only solve IP requests if the DHCP scope is on the same network ID as the server it’s running.dhcp2

If your router has IP: 192.168.10.1 and your DHCP scope is 192.168.11.1 – 50 it won’t work.


 

2. Make sure you do not have a router or switch between your DHCP server and clients with a different IP address than the DHCP server that’s serving IP addresses. See the image below. dhcp


 

3. Make sure that you do not configure multiple DHCP servers on the same LAN with overlapping scopes.

Be sure you do not have two DHCPs configured in one network. They will overlap each other and you’ll have IP conflicts in your network.

dhcp3

In case of Small Business Server, the DHCP service will automatically stop when it detects another DHCP server on the LAN.


what is DHCP? DHCP doesn’t work

DHCP stands for Dynamic Host Configuration Protocol. What the DHCP does is giving out ‘IP Addresses’ to devices and interfaces that wants to go on the internet. The device will request an IP address from the DHCP server and will hand it out to him.

This is from my computer:

cmd

The IPv4-adres is the IP I got from the dhcp server: 192.168.10.120. You can see that the DHCP server also has an IP: 192.168.10.2. Most of the time a server, modem, or router in your network is the DHCP server.

From Wikipedia.orgThe Dynamic Host Configuration Protocol (DHCP) is astandardized network protocol used on Internet Protocol (IP) networks for dynamically distributing network configuration parameters, such as IP addresses for interfaces and services. With DHCP, computers request IP addresses and networking parameters automatically from a DHCP server, reducing the need for a network administrator or a user to configure these settings manually.

 Click here for more about DHCP.

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Bas

My name is Bas Wijdenes and I'm working full time as a services engineer at Wortell. In my free time I like to write tutorials about computer problems I encounter on a daily basis. The main reason I started my blog is, because I wanted to work on my English vocabulary. If you've encountered a computer problem you can't get your head around, please do not hesitate to contact me.

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