Cách khắc phục lỗi tra cứu DHCP không thành công trong Chromebook

Do you get the DHCP lookup failed error in Chromebook when you are attempting to connect to a network? No need to worry! Through this guide, you are going to learn how to fix DHCP Lookup Failed error in Chromebook.

Chromebook là gì? What is DHCP Lookup Failed error in Chromebook?

Chromebook is a new generation of computers that are designed to execute tasks in a manner that is quicker and easier than the existing computers. They run on Chrome Hệ điều hành that includes the finest features of Google along with cloud storage, and enhanced data protection.

Dynamic Host Configuration Protocol, abbreviated as DHCP, is a mechanism for device configuration on the internet. It allocates IP addresses and allows default gateways to facilitate quick and smooth connections between various devices on the IP network. This error pops up while connecting to a network. It basically means that your device, in this case, Chromebook, is not able to retrieve any information related to IP addresses from the DHCP server.

Cách khắc phục lỗi tra cứu DHCP không thành công trong Chromebook

What causes DHCP Lookup Failed lôi in Chromebook?

There are not many known causes of this issue. However, some of them are:

• VPN – VPN masks your IP address and may cause this issue.
• Wi-Fi extenders – They generally don’t gel well with Chromebooks.
• Modem/Router Settings – This too, will cause connectivity problems and result in DHCP Lookup failed error.
• Hệ điều hành Chrome lỗi thời – Using an outdated version of any operating system is bound to create problems on the associated device.

Let’s get to fixing this error with the easiest and quickest methods explained below.

Method 1: Update Chrome OS

Updating your Chromebook from time to time is a great way to fix any errors related to Chrome OS. This would keep the operating system in tune with the latest software and will also prevent glitches and crashes. You can rectify Chrome OS-related issues by upgrading the firmware as:

1. Để mở Thông báo trình đơn, nhấp vào Thời gian icon from the bottom-right corner.

2. Bây giờ, hãy nhấp vào bánh icon to access Cài đặt Chromebook.

3. From the left panel, select the option titled Giới thiệu về hệ điều hành Chrome.

4. Nhấp vào Kiểm tra cập nhật button, as highlighted.

5. Khởi động lại the PC and see whether the DHCP lookup issue is resolved.

Cũng đọc: Cách xóa tài khoản khỏi Chromebook

Method 2: Restart Chromebook and router

Restarting devices is an efficient way to fix minor errors, as it gives your device time to reset itself. Hence, in this method, we are going to restart both, router and Chromebook to possibly fix this issue. Just follow these simple steps:

1. Đầu tiên, tắt Chromebook.

2.tắt the modem/router and ngắt kết nối nó từ nguồn cung cấp điện.

3. Đợi a few seconds before you kết nối lại it to the power source.

4. Đợi for the lights on the modem/router to stabilize.

5. Bây giờ, bật the Chromebook and kết nối it to the Wi-Fi network.

Verify if the error DHCP lookup failed in Chromebook is fixed. If not, try the next solution.

Cũng đọc: Fix DHCP is not enabled for WiFi in Windows 10

Method 3: Use Google Name Server or Automatic Name Server

The device will display the DHCP lookup error if it is unable to interact with the DHCP server or IP addresses on a máy chủ DNS. Therefore, you can use the Google Name server or Automatic Name Server to solve this problem. Let’s see how to do this:

Option 1: Using Google Name Server

KHAI THÁC. Hướng đến Chrome Network settings từ Menu thông báo như đã giải thích trong Phương pháp 1.

2. Dưới Thiết lập mạng, chọn nút Wi-Fi tùy chọn.

3. Bấm vào mũi tên bên phải available next to the mạng to which you are unable to connect.

4. Scroll down to locate and select the Máy chủ tên tùy chọn.

5. Nhấp vào thả xuống chọn và chọn Google Name Servers from the given menu, as shown.

Check whether the Samsung TV Wi-Fi connection issue has been rectified by reconnecting it to the Wi-Fi network.

Option 2: Using Automatic Name Server

1. If the DHCP lookup failed error persists even after utilizing Google Name Server, khởi động lại Chromebook.

2. Now, proceed to the Thiết Lạp Mạng Lưới page as you did earlier.

3. Cuộn xuống Tên máy chủ label. This time, choose Automatic Name Servers from the drop-down menu. Refer to pic given above for clarity.

4. Kết nối lại to the Wi-Fi- network and verify if the DHCP problem has been resolved.

Option 3: Using Manual Configuration

1. If using either server didn’t solve this problem, go to the Thiết Lạp Mạng Lưới một lần nữa.

2. Here, toggle off the Định cấu hình địa chỉ IP tự động tùy chọn, như được mô tả.

3. Bây giờ, hãy đặt Chromebook IP address manually.

4. Khởi động lại the device and reconnect.

The DHCP lookup failed error in Chromebook error should be fixed by now.

Method 4: Reconnect to the Wi-fi network

Another easy method to fix DHCP lookup failed error in Chromebook is to disconnect it from your Wi-Fi network and reconnect it afterward.

Let’s see how you can do this:

1. Nhấp vào Wi-Fi symbol in the lower right corner of the Chromebook screen.

2. Chọn của bạn Wi-Fi network name. Click on Cài đặt.

3. In the Network Settings window, Ngắt kết nối mạng lưới.

4. Khởi động lại Chromebook của bạn.

5. Cuối cùng, kết nối it to the same network and continue using the device as usual.

Move to the next method if this does not fix the DHCP lookup failed error in Chromebook.

Cũng đọc: Sửa lỗi truy cập hạn chế hoặc không có kết nối WiFi trên Windows 10

Method 5: Change Frequency Band of the Wi-Fi network

It is possible that your computer doesn’t support the Wi-Fi frequency that your router offers. However, you can change frequency settings manually to meet the frequency standards of the network, if your service provider supports this change. Let’s see how to do this:

1. Phóng cơ rôm và điều hướng đến router website. Đăng nhập vào tài khoản của bạn.

2. Điều hướng đến Cài đặt không dây Và chọn thẻ Thay đổi ban nhạc tùy chọn.

3. Chọn 5GHz, if the default setting was 2.4GHz, hoặc ngược lại.

4. Cuối cùng, tiết kiệm all changes and exit. 

5. Khởi động lại your Chromebook and connect to the network.

Check whether the DHCP issue is now rectified..

Method 6: Increase DHCP range of Network Address

We observed that removing certain devices from the wi-fi network or manually increasing the number of devices limit helped rectify this issue. Here’s how to do it:

1. In any trình duyệt web, điều hướng đến của bạn router website và đăng nhập với thông tin của bạn.

2. Tiến hành cài đặt DHCP tab.

3. Mở rộng DHCP IP range.

For example, if the higher range is 192.168.1.250, expand it to 192.168.1.254, như hình.

4. Lưu the changes and ra trang web.

If the error DHCP lookup failed still pops up, you could try any of the succeeding methods.

Method 7: Disable VPN to fix DHCP Lookup Failed error in Chromebook

If you use a proxy or a VPN to connect to the internet, it may cause conflict with the wireless network. Proxy and VPN have been known to cause DHCP lookup failed error in Chromebook on numerous occasions. You can turn it off temporarily to fix it.

1. Nhấp chuột phải vào VPN client.

2. Chuyển đổi off the VPN, as highlighted.

3. Alternatively, you can gỡ bỏ cài đặt it, if it is no longer needed.

Cũng đọc: Sửa lỗi không thể truy cập trang web, không tìm thấy IP máy chủ

Method 8: Connect without Wi-Fi Extender and/or Repeater

Wi-fi extenders or repeaters are great when it comes to extending the Wi-Fi connectivity range. However, these devices have also been known to cause certain errors like the DHCP lookup error. Therefore, make sure that you connect to Wi-Fi straight from the router.

Method 9: Use Chromebook Connectivity Diagnostics

If you can still connect to the DHCP server and are still getting the same error message, Chromebook comes with an in-built Connectivity Diagnostics tool that will assist you in diagnosing and resolving connectivity issues. Here’s how you can use it:

1. Search for diagnostics in the Start Menu.

2. Click on the Chromebook Connectivity Diagnostics from the search results.

3. Nhấp vào Run Diagnostics link to start running the tests.

4. The app performs the following tests one by one:

• Cổng cố định
• DNS
• tường lửa
• Dịch vụ Google
• mạng nội bộ

5. Allow the tool to diagnose the issue. The connection diagnostics tool will perform a variety of tests and rectify issues nếu có.

Method 10: Remove all Preferred Networks

Chromebook OS, like any other operating system, retains network credentials to allow you to connect to the same network without entering the password every time to do so. As we connect to more Wi-Fi networks, Chromebook keeps storing more & more passwords. It also creates a list of preferred networks depending on past connections and data usage. This causes network stuffing. Hence, it is advisable to remove these saved preferred networks and check if the issue persists. Follow the steps given below to do the same:

1. Đi đến Khu vực trạng thái on your screen and click the mạng Icon then select Cài đặt.

2. Trong Kết nối Internet option, you will find a Wi-Fi network. Click on it.

3. Sau đó, chọn Mạng lưới được ưu tiên. A complete list of all saved networks will be shown here.

4. When you hover over the names of the network, you will see an X mark. Click on it to tẩy the preferred network. 

6. Repeat this process to xóa each Preferred Network riêng biệt.

7. Once the list is cleared, connect to the desired Wi-Fi network by verifying the password.

This should solve the DHCP lookup failed issue. If it doesn’t, proceed to the next solution.

Method 11: Reset the Router to fix DHCP Lookup Failed error in Chromebook

The DHCP problem might be caused by corrupt firmware on your router/modem. In such cases, you can always reset the router by pressing the reset button of the router. This restores the router to default settings and might fix the DHCP lookup failed in Chromebook error. Let’s see how to do it:

1. Bật your router/modem 

2. Xác định vị trí Reset button. It is a tiny button located on the backside or right-hand side of the router and looks like this:

3. Bây giờ, nhấn nút thiết lập lại button with a paper pin/safety pin. 

4. Wait for the router to reset completely for approximately 30 seconds.

5. Cuối cùng, bật the router and reconnect Chromebook.

Now check if you’re able to fix DHCP lookup failed error in Chromebook. 

Method 12: Contact Chromebook Customer Support

If you have tried all of the methods listed above and are still unable to resolve the lookup problem, you should contact official customer support. You can also receive more information from the Chromebook Help center.

Đề nghị:

Chúng tôi hy vọng bạn có thể fix the DHCP lookup failed error on Chromebook. Let us know which method worked for you the best. Have any queries/suggestions? Drop them in the comment section below.