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How can I disable Gratuitous ARP?
John Savill
August 3, 2000
1 Min Read
A. When a WindowsNT/2000 computer starts, a packet is broadcast on the network containing the computer's TCP/IP address to prevent the use ofduplicate addresses on the same network. This is called a gratuitous Address Resolution Protocol (ARP) packet.
For both performance and maintenance reasons, it is possible to disable this feature in WindowsNT if you have Service Pack 5 installed or any version of Windows 2000.
Start the registry editor (regedit.exe)
Move to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters
Double-click the ArpRetryCount value, type 0, and then click OK. If it does not exist create of type REG_DWORD
Close the registry editor
Reboot the machine
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