如何修復 Chromebook 中的 DHCP 查找失敗錯誤

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.

什麼是Chromebook？ 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 操作系統 that includes the finest features of Google along with cloud storage, and enhanced data protection.

Dynamic Host Configuration Protocol, abbreviated as 的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.

如何修復 Chromebook 中的 DHCP 查找失敗錯誤

What causes DHCP Lookup Failed error 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.
• Outdated Chrome OS – 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.打開 三回目の翻訳結果 菜單，點擊 Time 右下角的圖標。

2. 現在，單擊 齒輪 訪問圖標 Chromebook設置.

3. From the left panel, select the option titled 關於Chrome操作系統.

4。 點擊 檢查更新 button, as highlighted.

5. 重新啟動 the PC and see whether the DHCP lookup issue is resolved.

相關閱讀： 如何從 Chromebook 中刪除帳戶

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。 第一， 關 Chromebook。

2.關 the modem/router and 斷開 它來自電源。

3. 等待 a few seconds before you 重新連接 it to the power source.

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

5.現在， 打開 the Chromebook and 連 it to the Wi-Fi network.

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

相關閱讀： 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 DNS服務器. 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

1。 導航 Chrome Network settings 來自 通知菜單 如中所解釋的 方法1.

2。 下 網絡設置，選擇 Wi-Fi 選項。

3。 點擊 右箭頭 available next to the 網絡 to which you are unable to connect.

4. Scroll down to locate and select the 名稱服務器 選項。

5。 點擊 下拉 框並選擇 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, 重新開始 Chromebook。

2. 現在，繼續 網絡設置 page as you did earlier.

3。 向下滾動到 名稱服務器 label. This time, choose Automatic Name Servers from the drop-down menu. Refer to pic given above for clarity.

4. 重新連接 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 網絡設置 再來一次。

2. Here, toggle off the 配置IP地址 自動 選項，如圖所示。

3. 現在，設置 Chromebook IP address manually.

4. 重新啟動 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。 點擊 Wi-Fi symbol in the lower right corner of the Chromebook screen.

2.選擇您的 Wi-Fi network name. Click on 設定.

3. In the Network Settings window, 斷開 網絡。

4. 重新啟動 您的 Chromebook。

5。 最後， 連 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.

相關閱讀： 修復 Windows 10 上的 WiFi 存取受限或無連線問題

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。 發射 Chrome瀏覽器 然後導航到 router website. 登入 您的帳戶。

2。 導航到 無線設置 選項卡並選擇 更改頻段 選項。

3。 選擇 5GHz， if the default setting was 2.4GHz， 或相反亦然。

4.最後， 保存 all changes and exit. 

5. 重新啟動 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 網頁瀏覽器，導航到您的 router website 和 登錄 與您的憑據。

2. 繼續 DHCP 設定 標籤。

3。 展開 DHCP IP range.

For example, if the higher range is 192.168.1.250, expand it to 192.168.1.254， 如圖所示。

4. 節省 the changes and 出口 網頁。

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.右鍵單擊 VPN client.

2. 切換 off the VPN, as highlighted.

3. 或者，您可以 卸載 it, if it is no longer needed.

相關閱讀： 修復無法存取網站、​​找不到伺服器IP的問題

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。 點擊 Run Diagnostics link to start running the tests.

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

• 強制門戶
• DNS
• 火牆
• 谷歌服務
• 本地網絡

5. Allow the tool to diagnose the issue. The connection diagnostics tool will perform a variety of tests and rectify issues 如果有的話。

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。 轉到 狀態區 on your screen and click the 網絡 Icon then select 設定.

2. 內 互聯網連接 option, you will find a Wi-Fi network. Click on it.

3. 然後，選擇 首選網絡. 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 清除 the preferred network. 

6. Repeat this process to 刪除 each Preferred Network 個別地.

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. 打開 your router/modem 

2.找到 RESEt button. It is a tiny button located on the backside or right-hand side of the router and looks like this:

3. 現在，按 重置 button with a paper pin/safety pin. 

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

5。 最後， 打開 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.

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我們希望您能夠 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.