I'm trying to edit / change the default duration of the ARP cache entries stored in a Windows 2012R2 server TCP/IP stack (for IPv4 entries).

I've tried to edit the following OS registry keys: -"ArpCacheLife" -"ArpCacheMinReferencedLife" located under HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

as described in https://technet.microsoft.com/en-us/library/cc957524.aspx#mainSection https://technet.microsoft.com/en-us/library/cc957525.aspx

but apparently there's no change in the default ARP cache entries timeout behavior.

Also, no changes are apparently introduced to both ARP caches that windows 2012R2 uses: - ARP referenced entries - ARP unreferenced entries

I would be grateful for any suggestion and reference to the corresponding technical documentation.


1 Answer 1


See Description of Address Resolution Protocol (ARP) caching behavior in Windows Vista. Although it says Vista other versions are listed. I used the query instructions and they worked.

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