ARP or Address Resolution Protocol in Windows is responsible for resolving IP addresses to MAC addresses to speed up connections over the local network. So instead of asking the router what a particular device is, the router will again simply use the resolved IP to connect quickly. To do this, it maintains a cache named ARP Cache. This post helps you understand and clear ARP Cache in Windows 11 and Windows 10.
The ARP cache or Address Resolution Protocol is an essential component of the Windows Operating System. It associates the IP address with the MAC address so that your computer can communicate effectively with other computers. The ARP cache is basically a set of dynamic entries that are generated when hostnames are resolved to IP addresses and IP addresses are resolved to MAC addresses. All mapped addresses are stored in the computer in the ARP cache until it is cleared.
A. Routing and Remote Services
1. First, open the Services application. To do that, press the Windows key + R shortcut, type services.msc and click the Ok button.
2. In the services window, find the Routing and Remote Access service. Next, right-click on the service and select the Properties option.
3. In the properties window, make sure the Service Status says Stopped. If it doesn’t, click the Stop button and then the Ok button. You can now safely close the Services window.
4. Restart the PC, and come back to the same place, and enable it.
This process will clear all ARP or IP to MAC address mapping on the PC.
B. Command Prompt with netsh Tool
1. Search for Command Prompt in the Start menu, right-click on the result and select the Run as administrator option. This action will open the elevated Command Prompt window.
2. In the cmd window, execute the arp –d command. As soon as you do that, Windows will clear the ARP cache.
3. As an alternative, you can also use the netsh tool to flush the ARP cache. Here’s the command.
netsh interface IP delete arpcache
Next, close the Command Prompt window and reboot Windows.
After rebooting, Windows will automatically create the ARP cache as required based on the LAN connections. You don’t have to do anything manually.
That is all. It is that simple to clear the ARP cache in Windows 10 and 11.
I hope that helps.
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