I have a lan of maybe 200 nodes where a BSD box is performing as the
core router (with cisco's doing line-connectivity). It is all switched,
with no VLAN in place.
Each machine (in general) has its own subnet. Most are /29's, some are as
large as a /25. Each subnet has a single gateway ip configured on the
router. This is so that each machine can have a gateway within its own
This works reasonably well, except that when running ethereal on one of
the local machines, I discovered an alarming rate of ARP requests coming
out from the MAC of the BSD router.
Considering the arp is supposed to be cached for 20 minutes or more until
something different is heard, I shouldn't see five or six requests within
I don't see this when routing with (say) a Cisco router. Is there some
reason for this?
TCPDumps from my local desktop available upon request.
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