>
>> use the arp command to dump ARP tables and look for suspicions or
>> correctness
>> there should be an entry for every IP destination you have attempted to
>> contact
>> via the Ethernet interface
>
> That there is, I can use arp -a to see the MAC addresses of each machine I
> ping while the interface is working. When the network stops working,
> however, arp -a doesn't yield a result. I see traffic transmitted on the
> hub, but none of it seems to be able to get anywhere.
>

Slight update, my good, working linux box initally shows the MAC address
of the Sun3 in response to an arp command, but that changes to an
<incomplete> once the interface goes poof. Also, I'm not sure if I
mentioned this before, but going to /etc/rc.d and doing a network stop and
a network start fixes the problem, if only for a couple more minutes.

Thanks again!

Zach