>>                 00:50:fc:21:01:3e rtk0 4294967106 flags=3D0<>
>> Those entries that time out in over 136 years look..wrong.
> I've seen this once before too, when bridging a network with lots of
> hosts.  I suspect a race, perhaps when adding multiple new hosts at
> once or something.  They went away with a flush, IIRC, but of course
> that doesn't address the underlying problem.  If it happens again for
> you, try that and see whether it helps restore normal function; if so
> it may help indicate which is cause and which effect.

I just now checked, and it has picked up a bunch of 136-year entries,
but it's still passing packets - it appears the two symptoms are at
least partially decoupled.

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