如果您收到一条错误消息，显示“ DHCP 查找失败^{(DHCP Lookup Failed)}”，那么这是因为您的计算机上的协议配置错误。已报告该错误出现在浏览器上。不用说，您将需要一个管理员用户帐户来解决问题。

什么是 DHCP？

动态主机配置协议 (DHCP)^{(Dynamic Host Configuration Protocol (DHCP))}是一种网络协议。它负责管理和自动化 IP 分配过程，以便在网络上时可以单独访问设备。我相信您在配置充当DHCP设备的路由器时一定见过这个。当计算机启动时，它会寻找DHCP 设备或服务器并尝试获取 IP。如果设备不存在或未正确配置，则DHCP 查找^{(DHCP Lookup)}将失败。

如何修复 DHCP 查找失败

按照这些建议解决问题。

1. 连接到同一DHCP^(DHCP)服务器的设备过多。
2. 更新IP
3. 运行网络疑难解答

您应该能够在没有任何管理员帐户的情况下解决此问题。

1 ]^{(] Too)}连接到同一个DHCP 服务器的设备太多^{(DHCP Server)}

每个DHCP服务器都有一个SUBNET配置，它基本上决定了它可以管理多少设备。通常，我们都使用 IP 为 192.168.XY 的 255.255.255.0子网掩码^(Subnet)如果您有大量设备连接到服务器，即超过 200 台，那么切换到 A 类或B 类^{(Class B)}子网是一个好主意。最好让您的 IT 管理员

• A 类网络使用默认子网掩码 255.0.0.0
• B 类网络使用默认子网掩码 255.255.0.0

如果您具有配置路由器的基本知识，则此设置应该在您登录后作为第一个选项可用。大量购买Chromebook^{(Chromebooks)}的组织主要报告了该问题，并且网络还没有准备好同时管理所有 Chromebook。

2]更新IP

路由器可能无法为每个设备分配 IP 地址，其中一些设备失败了。在这种情况下，您可以在Windows上的^(Windows)命令提示符^{(Command Prompt)}上运行以下命令。

ipconfig /renew

这将强制计算机使用DHCP连接以获取新的 IP 地址。

如果您使用的是Chromebook，您可以使用Chrome 操作系统^{(Chrome OS)}设置来修复它。转到Chrome 操作系统设置^{(Chrome OS Settings)}，然后找到Internet 连接^{(Internet Connection)}。它具有手动分配 IP 或拨动开关的设置，这将启动 IP 更新请求。

3]运行网络疑难解答

Windows 带有一个内置的网络疑难解答。您可以在Windows 设置^{(Windows Settings)}( WIN +I ) >更新^(Update)和安全 > 高级疑难解答中找到它。找到 Internet Connections^{(Locate Internet Connections)}，选择它，然后运行它。

您也可以输入network Troubleshooter，它会弹出Internet Connections Troubleshooter，您可以立即运行它。

如果这没有帮助，请尝试使用 Windows 10 中的网络重置选项。

我希望这篇文章对您有用并帮助您解决DHCP 查找^{(DHCP Lookup)}失败的问题。

How to fix DHCP Lookup Failed error om Windows & Chromebooks

If you receive an error message which says— DHCP Lookup Failed —then it’s because of a misconfigured protocol on your computer. The error has been reported to appear on browsers. It goes without saying that you will need an admin user account to fix the problem.

What is DHCP?

Dynamic Host Configuration Protocol (DHCP) is a network protocol. It is responsible for managing and automating the process of IP assignment so the devices can be individually accessed when on a network. I am sure you must have seen this one when configuring a router, which acts as a DHCP device. When a computer boots, it looks for a DHCP device or server and tries to get an IP. If the device is not there or not configured properly, the DHCP Lookup will fail.

How to fix DHCP Lookup Failed

Follow these suggestions to fix the problem.

1. Too many devices connecting to the same DHCP server.
2. Renew IP
3. Run Network Troubleshooter

You should be able to resolve this without any admin account.

1] Too many devices connecting to the same DHCP Server

Every DHCP server has a SUBNET configuration which essentially decides how many devices it can manage. Usually, we all use the 255.255.255.0 Subnet mask with IP as 192.168.X.Y. If you have tons of devices connecting to the server, i.e., more than 200, then it is a good idea to switch to Class A or Class B subnet. It would be best to ask your IT admin to

• Class A networks use a default subnet mask of 255.0.0.0
• Class B networks use a default subnet mask of 255.255.0.0

If you have a basic knowledge of configuring the router, this setting should be available as the first option after you login. The issue was largely reported by organizations that bought Chromebooks in bulk, and the network was not ready to manage all of them together.

2] Renew IP

It is possible that the router wasn’t able to assign an IP address to every device, and some of them failed. In that case, you can run the following on the Command Prompt on Windows.

ipconfig /renew

This will force the computer to connect with DHCP to get a new IP address.

If you are using a Chromebook, you can use the Chrome OS settings to fix it. Go to Chrome OS Settings, and locate the Internet Connection. It has settings to manually assign an IP or toggle switch, which will initiate an IP renewal request.

3] Run Network Troubleshooter

Windows comes with a built-in Network troubleshooter. You can find it in Windows Settings (WIN +I) > Update and Security >  Advanced Troubleshoot. Locate Internet Connections, select it, and run it.

You can also type network troubleshooter, and it will bring up the Internet Connections troubleshooter, which you can instantly run.

If that does not help, try using the Network Reset option in Windows 10.

I hope the post was useful and helped you to fix DHCP Lookup Failed issue.

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