How to fix DHCP Lookup Failed Error On Chromebook and Windows?

How to fix DHCP Lookup Failed Error On Chromebook and Windows

What does DHCP Lookup Failed mean?

“DHCP lookup failed” error occurs when your Chromebook or computer fails to get an IP address from the DHCP server and hence fails to connect to the internet. Any device that connects to a network needs an IP address to establish a connection between itself and the internet. This is usually caused by:

  • Issue with the DHCP server – router or modem
  • Problems with the computer’s network card
  • Issue with the DHCP setting such as it’s range
  • Problem with the DNS Server
  • DHCP requests being blocked by your computer’s firewall or VPN

We’ve always been there at some point in time! Just today I got the same error on my Chromebook – believe it or not!

What is DHCP?

DHCP stands for Dynamic Host Configuration Protocol. It’s a network protocol that automatically assigns IP addresses to devices on a network. When you connect to a new network, your device will send out a DHCP request to obtain an IP address. 

Fortunately, there are some steps you can take to try and fix this issue.

We’ll discuss what a DHCP Lookup Failed error is and how to troubleshoot it in both Chromebooks and Windows computers. This type of error can be extremely frustrating and may prevent you from accessing the internet for long periods of time.

How to Fix the DHCP Lookup Failed Error?

Restart router

The first step to resolving any DHCP error is to restart your router. This will clear out any temporary issues causing the problem and reset its configuration.

Remember, always wait for a few seconds before you switch on the router. We’ve seen clients who turn it off and on almost immediately, this doesn’t always reboot the router, in actuality!

See below on how to power-cycle your modem:

Extend the Router’s DHCP Range

To extend the DHCP range on your router, you will need access to its administrative settings. To do this, open up an Internet browser and type in “192.168.1.1” (or whichever address is assigned to your router).

This should open up a login page where you will be prompted for a username and password—the default credentials for most routers are “admin/admin” but these may vary depending on the brand and model of your router so consult its documentation if necessary).

Once logged in, navigate to the DHCP settings page and change the starting and ending IP address ranges as desired—usually extending them from .2 through .254 is enough for most households although some require further customization for larger networks.

Make sure that any changes made are saved before exiting the settings page! 

Update the router’s firmware

Step 1: Check Your Router Manufacturer’s Website for Updates 

The first step when updating your router’s firmware is to check the manufacturer’s website for any available updates.

Most routers will have a section dedicated to their software or firmware downloads, so make sure you look there first before downloading from another source.

If you find an available update, download it and save it somewhere on your computer that you can easily access later. 

Step 2: Backup Your Settings 

Before installing any new software or firmware, it’s always a good idea to back up your existing settings in case something goes wrong during the update process. This way, if anything does go wrong, you’ll be able to quickly revert to the way things were before the update started.

To back up your router settings on most devices, simply navigate to the Administration tab in the web interface and click “Backup Settings”.

You can then save this file somewhere safe on your computer or external drive as a precautionary measure. 

Step 3: Install The Update 

Once you’ve downloaded the update and backed up your settings, it’s time to install the new firmware. To do this, simply navigate back to the Administration tab in the web interface and click “Firmware Upgrade”.

From here, select the file that you just downloaded and begin installing it onto your router. Depending on which type of router you have, this process may take anywhere from 5 minutes up to an hour or more—so make sure not to interrupt or turn off the power during this time!

Once complete, your router should be running with its new updated firmware version!  

Resetting your Network Adapter 

One of the simplest solutions for resolving this issue is to reset your network adapter. To do this, open up a command prompt window by pressing Windows + R and typing “cmd” into the box. From here, type “netsh winsock reset” and press enter. You may need to restart your computer for these changes to take effect.

Manually Setting Your IP Address 

If resetting your network adapter didn’t work, then you may need to try manually setting your IP address instead. To do this, open up a command prompt window again (as mentioned above) and type “ipconfig /all” and press enter.

Make sure to write down all of the information provided on-screen. Next, go into settings > network & internet > status > change adapter options and right-click on your active network connection. Select properties, then double-click on Internet Protocol version 4 (TCP/IPv4), then select the “Use The Following IP Address” option before entering all of the information that you wrote down previously in each of the boxes that appear.

Once done, click OK twice to save all of these changes, then reboot your computer once more for them to take effect. 

What Other Settings Cause the DHCP Lookup Failed Error?

There are several potential causes for this error, including the following: 

  1. Your device is not connected to the network. Make sure that your Ethernet cable is plugged in or that your Wi-Fi connection is active. 
  2. The DHCP server is unavailable. This could be due to maintenance or an issue with the server itself. 
  3. There is already an IP address conflict on the network. This means that another device is using the same IP address as your device. 
  4. Your ISP (internet service provider) could be experiencing an outage. 
  5. You might have a virus or malware infection on your computer. This could be causing your computer to misbehave and preventing it from connecting to the network correctly. 
  6. Your computer’s firewall might be blocking DHCP requests. Check your firewall settings and make sure that DHCP traffic is allowed. 
  7. Your router might be configured incorrectly. Check your router’s settings and make sure that it’s configured to use DHCP. 
  8. You might have a problem with your network adapter. Try uninstalling and reinstalling the driver for your network adapter. 
  9. If you’re using VPN (virtual private networking), it could be interfering with your ability to connect to the network correctly. Try disconnecting from VPN and see if that solves the problem. 

How Do I Fix DHCP Lookup Failed Error on Chromebooks? 

1. Restart Your Device

The first thing you should do is restart your device. This will reset any corrupt settings and may resolve the issue without further action needed. Just be sure to save any work or open tabs before restarting so that nothing gets lost!  

2. Check Your Network Settings

Sometimes your network settings may be incorrect or outdated which could prevent your device from connecting properly. To check these settings, go into your Chrome OS Settings menu and select “Internet Connection” from the list of options. Make sure all of the information here is correct and up-to-date (this includes both the wifi password and other connection details).  

3.Change DNS Server

Use Google DNS: 8.8.8.8

8.8.4.4

Open Settings 

The first step is to open up the Chrome OS settings menu. To do this, click on the system tray (the small clock icon in the lower right corner of your screen) and select “Settings”. From there, scroll down until you locate the “Network” section and click on it. 

Select Network Connection 

Now that you’re in the Network section, you’ll need to select which type of network connection you have. This can either be Wi-Fi or Ethernet (wired). Select the one that applies to you and then click “Options”. 

Configure IP Settings 

Once you have selected your network connection type, you’ll need to configure its IP settings. In this section, make sure that “Automatic Configuration” is set to “Off”, then enter your preferred DNS server address(es). Make sure that both IPv4 and IPv6 addresses are entered if applicable. Once everything is configured correctly, click “Save”. 

Restart Your Computer 

The final step is to restart your computer so that all of these changes can take effect. After restarting, check whether or not your new DNS server is working properly by running a few tests online or opening a web page that requires an internet connection.

4.Try a Different Network

If none of these steps have worked so far, try connecting to a different wifi network if possible (such as one at home or work). This will help narrow down whether the issue lies with your current connection or with something else entirely.  

How Do I Fix DHCP Lookup Failed Error on Windows? 

As with every problem and as mentioned above – I would first restart my Windows computer or laptop. Then I would power cycle my modem and/or router.

and then I would:

Change the DNS Server of my Windows device

Use Google DNS: 8.8.8.8

8.8.4.4

Open up the Network Connections window. You can do this by typing “Network Connections” into the taskbar search and clicking on it once it pops up. This will open up a new window with all of your network connections listed. 

The next step is to right-click on the network connection that you want to change the DNS server for and click “Properties” from the menu.

This will open up a new window with all of the settings for that particular network connection. From here, select “Internet Protocol Version 4 (TCP/IPv4)” from the list and then click on “Properties” again. 

This will bring up another window with more settings related to that particular network connection.  

Now you can enter the IP address of your new DNS server under “Use The Following DNS Server Addresses” and click “OK” when you’re finished entering in all of the information.

Once you have done this, your new DNS server should be set and any web requests will now be routed through this new server instead of your old one.  

Still having issues with your network? Our WiFi technicians are just a phone call away!

Author:
I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...