Gratuitous Request and Reply in ARP


  1. This information is very useful..But required more about Gratitous arp..

  2. I was wondering if and how Microsoft Exchange Server 2007 supports Gratuitous ARP?


  3. To send gratuitous ARP packets in Windows 2008 and above, download arping for Windows (Thomas Habets version), copy it to the server you wish to update ARP for, and run arping -S . This will broadcast gratuitous ARP packets since Windows no longer will.

  4. That last post removed part of the command. The correct command is arping.exe ipaddr -S ipaddr. Replace ip-addr with your IP address.

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