Automatically get an IP address and can t access the internet

This question is clear at first glance.

Because your computer can be a computer or a router and other devices) to use as a gateway to access the Internet and do DNS (domain name resolution system), when manually setting your computer IP, it will be in the same network segment as the gateway, and it will naturally be able to surf the Internet normally.

When you set it to automatically get IP, your computer IP is, and the default gateway and DNS server settings have also become, but in fact, the IP of your gateway and DNS server equipment has not changed, it is still the same, and it is in a different network segment, and they can't communicate with each other, and of course they can't access the Internet!

Solution: In fact, there is only one principle: the IP of your computer should be in the same network segment as the IP of the gateway device (but not the same), and the default gateway and DNS server set on your computer should be consistent with the IP of the actual gateway and DNS device.

1. Modify the IP of the gateway device (that is, the computer or router, modem, etc. used as the gateway) or:

2. Modify the DHCP server and modify the automatically assigned IP interval to in, so that the IP obtained by your computer can be in the same network segment as the gateway within this range, and can communicate.

3. Still use the method of manually setting IP to surf the Internet. In fact, this has a lot of benefits, your computer will boot up faster, because it doesn't have to look for a DHCP server! And because the IP is fixed, it is also convenient to share data with other users within the local area network.

The question goes like this.

Because in the router you're using.

The settings inside are:

Therefore, there will be a phenomenon that cannot be connected to the Internet.

As for why it's different?

It's a good question. Because it's automatic.

Sometimes the IP address you get is not necessarily the correct one (the one that can surf the Internet).

You can fix it like this.

My computer > right-click on management - > Device Manager - > find the network card - > uninstall the network card - > and then click to scan for hardware changes - > then it is to check if the IP address is correct in the online neighborhood.

In general, you can change the IP address. You can also disable the NIC and then enable it. That's okay too. However, the chances of both being changed are smaller.

The best thing to do is to configure the IP manuallyThat way, there won't be a problem.

This kind of problem often occurs in our company. I've done it all like the one above.

Do you have 2 routers in use in your LAN? The network segment is and is made by 2 different routers doing DHCP respectively, and the router you can normally access the Internet is , it is recommended that you choose IP and DNS to get it automatically, when you get this network segment, you open a web page and enter to see what kind of device it is (most likely it is a router, or DC server) Change the IP of the device from to DHCP and turn off the DHCP function of the device (confirm that there is no device in your network segment and then use the IP). 1 LAN can only have 1 device as the transmitter DHCP, otherwise there will be conflicts.

Unless you divide the VLAN.

Is DHCP used to assign IP addresses?

If yes, you check if the DHCP service is turned on.

My computer right-click - Management - Services & Applications - find DHCP and launch it.

In this case, it seems that DNS should also be set to automatic to access the Internet, right? Have you set it up?

I didn't look carefully just now, but after a closer look, I understand that your router's DHCP function is invalid and cannot be automatically assigned an address.

The gateway of your router is.

The gateway to your machine is:

This is not in the same network segment at all, how is it possible to surf the Internet?!

Subnet Mask: Default Gateway:

Preferred DNS server:

Don't select Auto-Assign anymore.

You just select the option below.

Then configure the IP above.

Maybe you have two DHCP servers in your network, and DHCP servers can usually be handled by network devices such as routers and switches.

Isn't it ARP, haha, our school has been like this recently, ARP is raging!

The procedure for Ethernet without DHCP enabled is as follows:

Tools Raw materials: Dell Inspiron 15, win101, if the machine is not enabled DHCP, then enter the system and press the win+r key combination to open and run.

2. Type in the Run input box and press Enter.

3. Open the service panel, find the DHCP client service and double-click to open it.

4. Select "Automatic" as the startup type, click "Apply" and "OK" to start the DHCP service.

5. Change the adapter settings, open Internet Protocol version 4, and set to automatically obtain IP addresses.

Solution: 1. Take the win7 system as an example, first click on the open network option in the network location that has been connected, and click "Open Network and Sharing Center" in it.

2. Then in the Network & Sharing Center window that opens, click "Change adapter settings" in the left menu.

3. Then right-click the connected network icon in the network connection page that opens, and click "Properties" in the pop-up options.

4. Select "Internet Protocol Version 4" in the properties dialog box that opens and click the "Properties" button below.

5. You can open the property setting dialog box, click "Use the IP address below" and enter the fixed IP address, and click OK to complete the setting.

Make model: Lenovo ThinkPad X250 System: Windows10

**Steps:1. Open the control panel, find and click "Network and Sharing Center".

2. Enter the "Network and Sharing Center" interface and click the "Ethernet" option button.

3. Enter the "Ethernet Status" interface and click the "Details" option button.

4. Enter the "Details" page and record the "IPv4 address", "subnet mask", "default gateway" and other information.

5. Click the "Use the IP address below" button, fill in the recorded address information, and you can access the Internet.

<>2, in the IPv4 protocol of the network adapter, there are two main ways:

b, win10, in turn:

Start Menu - > Settings - > Network & Internet - > Ethernet (or WiFi) Settings.

Click Auto (DHCP).