ARP (Address Resolution Protocol) plays a decisive role in TCP / IP connections. Therefore, if there are some problems loading some sites or the lack of ping of IP addresses, then try clearing the arp cache. It should be noted that this procedure is performed only from the command line.
Instructions
Step 1
First, invoke the command line by opening the Start menu. In the search bar, enter "cmd", but without the quotes, and do not press the Enter key. Instead, right-click on the "cmd.exe" link and select the "Run as Administrator" (or Run as Administrator) line. Now you need to confirm the execution of the process in a window called "User Account Control". After that, the command line will appear in front of you. By the way, if its icon is already fixed in the "Start", then you do not have to use the search.
Step 2
Next, proceed with the "arp -a" command. It will display a list of all ARP entries stored on the device. However, the -a option is not the only option, as other switches are supported by the arp command. For example -d, it allows you to remove the IP address. Thanks to -d -a it is possible to remove all entries from the ARP table. Conversely, the -s option adds records to the table.
Step 3
To completely remove ARP cache in Windows 2000 / XP / Vista / 7, click the "Start" button, then "Run". In the field that appears, enter the netsh interface ip delete arpcache command. Click Ok to complete the operation.
Step 4
Just in case, check if the cleaning procedure went well. To do this, run the arp -a command. If the cache has not been cleared, then the reason may be an operating system error. This error can occur when you activate the Routing and Remote Access service.
Step 5
To solve the problem, enter the control panel, in the "System and Security" section, select "Administrative Tools". Next, start the "Computer Management" application and double-click to open the "Services" section. Click on the "Routing and Remote Access" item, and in the menu that appears, run the "Disabled" option. Once you've done all the necessary steps, try clearing the arp cache again.
