If you determine that one of the entries in the ARP cache is incorrect, resolve the problem by clearing the ARP cache. Clearing the ARP cache isn't harmful, even if all entries appear correct. Therefore, it's a safe step to take during troubleshooting.
To clear the ARP cache, open a command prompt and run the following command.
arp -d
Alternatively, you can clear the ARP cache by disabling and re-enabling a network adapter or by choosing the automated Repair option. For more information about the Arp tool, run Arp -? at a command prompt.
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