I made a couple of changes to a Penguin Altus 1300
yesterday.  It's running SL304 with all the updates
available as of about 3-4 weeks ago.  I made it the
primary DNS server and I activated the second onboard
NIC.  I used the redhat-config-ethernet app.  Now I
get several of these in my logs every hour.  The
exact number varies from 2 to around 10 or so.

Fri Jul 29 14:27:31 CDT [FastEnet-10/100/e3b:info]: arp info overwritten for 192.168.1.32 by 00:a0:d1:e1:dc:2f
Fri Jul 29 14:29:15 CDT [FastEnet-10/100/e3a:info]: arp info overwritten for 192.168.1.32 by 00:a0:d1:e1:dc:2e
Fri Jul 29 14:44:35 CDT [FastEnet-10/100/e3b:info]: arp info overwritten for 192.168.1.32 by 00:a0:d1:e1:dc:2f
Fri Jul 29 14:46:25 CDT [FastEnet-10/100/e3a:info]: arp info overwritten for 192.168.1.32 by 00:a0:d1:e1:dc:2e
Fri Jul 29 14:58:39 CDT [FastEnet-10/100/e3b:info]: arp info overwritten for 192.168.1.32 by 00:a0:d1:e1:dc:2f

I have another identical system on which I also
activated the second NIC, but which is a slave
DNS server to the first system.

The primary NICs are on the .1 subnet, the new
NICs are on the .2 subnet.  The two MACs in
the logs correspond to the 1st and second NICs
on the first system described above.

AFAICT, there's no other system with this IP
address.

Is this a known issue, or just my fun to track down?

Thanks,
Miles