What is IP Conflict? How to fix IP conflict on Windows and Mac

 IP conflicts occur when two or more devices on the same network use the same IP address. IP address conflicts cause many problems in connecting to the Internet as well as transmitting data between devices on the internal network. So to better understand what IP conflicts are and how to fix this error, let's find out with  TipsMake  right through the article below. 

What is IP conflict?

An IP conflict occurs when two or more devices on the same network have the same IP address. Each device connected to a network needs a unique IP address to communicate with other devices and access the Internet. When an IP conflict occurs, devices cannot determine where their data is headed, causing delays or even complete disconnection.

What is IP Conflict? How to fix IP conflict on Windows and Mac Picture 1

What is IP conflict?

IP conflicts often occur in LANs (Local Area Networks), where many devices are connected to each other. IP conflicts need to be handled promptly to ensure stable network operation.

Causes of IP conflicts

Understanding the causes of IP conflicts will help users easily prevent and fix this problem effectively.

1. Incorrect manual IP address assignment: When users try to assign a static IP address to a device without paying attention to the address being used by other devices on the network, it is easy to lead to IP conflicts.
2. Malfunctioning DHCP server: A malfunctioning or incorrectly programmed DHCP server can assign the same IP address to multiple devices, causing conflicts.
3. Moving between networks: When a device moves from one network to another without its IP address being reconfigured, it may retain its old IP address and cause conflicts when it returns to its original network.
4. Automatic reconnection: Some devices, such as computers and smartphones, can automatically reconnect to the network without user intervention. If the device once had an IP address on the network but it has now expired, it can cause conflicts if another device has already claimed that address.

Consequences of conflict

1. Disconnected: In severe cases, the device with the IP conflict may completely lose the ability to connect to the Internet or local network, the device will not be able to access any online services.
2. Unstable network connection: Instead of losing connection completely, the device may experience unstable network connection, which is often interrupted.
3. Unable to access shared network resources: The device will not be able to access files and folders stored on file servers, network printers, network scanners, or network attached storage (NAS) devices.
4. Security Issues: In some cases, attackers can exploit IP conflicts to perform Man-in-the-Middle (MITM) attacks, intercepting and modifying data transmitted between devices.

How to fix IP conflicts effectively

To fix IP conflicts, users can take some specific measures on both Windows and Mac. Here is a detailed guide on how to handle this issue.

Fix IP conflict on windows

On Windows operating system, users can apply some of the following simple methods to fix IP conflicts.

Change static IP address

1. If you are using a static IP address, change the IP address for the conflicting device using the steps below:
2. Control Panel > Network and Internet > Network and Sharing Center.
3. Select "Change adapter settings", right-click on the connection you are using and select "Properties". In the list, find "Internet Protocol Version 4 (TCP/IPv4)", select it and click "Properties".
4. From here you can enter a new IP address for the device, making sure that this IP address does not match any other device on the network.

Restart the router

You can use Command Prompt to fix IP conflicts. Open Command Prompt with administrative privileges and enter the following commands:

ipconfig /release

ipconfig /renew

This command will release the current IP address and request the DHCP server to allocate a new IP address.

Fix IP Conflicts on Mac

On Mac operating system, users can also perform similar steps to fix IP conflicts.

Check and change IP address

You can check and change your IP address on your Mac by going to 'System Preferences' > 'Network'. Select the network connection you are using and click 'Advanced'. In the 'TCP/IP' tab, you can change your static IP address or switch to automatic IP acquisition.

Reset router

Just like Windows, restarting your router can help refresh the IP addresses on your network. Turn off the router for a few seconds and then turn it back on.

Using Terminal

On a Mac, you can use Terminal to change your IP address. Open Terminal and enter the following command:

1. Sudo ipconfig set en0 DHCP
2. This command will ask the server to assign a new IP to the device.

Conclude

Understanding what IP conflicts are and their causes and consequences will help users prevent and fix them in time. Fixing IP conflicts on Windows and Mac is quite simple, just follow the basic instructions. However, in addition to fixing them, users should also take precautions such as properly configuring the network, carefully using static IP addresses, and regularly checking the network status.

Samuel Daniel

Update 18 February 2025