ARP entries don't "live" long enough to matter.
Sometimes they aren't even the true MAC of the target Host anyway,...they
are the MAC of the router between the two segments when more than one
segment exists.
The machine will discover the correct MAC the next time it has to
communicate with that particular Host.
--
Phillip Windell
www.wandtv.com
The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
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<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com...
> Hi.
>
> Simple scenario: Windows machine learns that IP:A resides on MAC:A. A
> gratuitous ARP is received saying that IP:A now resides under MAC:B.
> Windows, by default, will ignore this and retain IP:A resides on MAC:A
> in its ARP cache. Is there a way to configure Windows to replace
> updated cache entries (as it should)?
>
> Thanks
>