It happened to me !, never found the time to investigate it. Its obvious
flaw in Kernel design.
One way to go around it tho is to reassign a new address to that same
interface (virtual interface).
Andrew Morton wrote:
> If you have a dual-homed host and ifdown one of its interfaces, Linux
> (2.3.99) continues to generate arp replies on behalf of the downed
> interface's IP address. It does so until the device is actually
> unregistered.
>
> The user-visible effect of this is that the downed interface's IP
> address continues to appear on the network until ten minutes later when
> cron reaps the driver module.
>
> Is there a reason for this behaviour?
>
> I would have thought that downing an interface should imediately make
> its IP address disappear from the network. If an admin were to down an
> interface, then walk over to another machine and bring up an interface
> with the same IP address, sticky things could happen.
>
> --
> -akpm-
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