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List:       freebsd-hackers
Subject:    FreeBSD  hanging because of ethernet
From:       Samvel Stepanian <sam () arminco ! com>
Date:       1997-07-30 17:28:28
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Dear hackers,

I am experiencing repeated hangings of FreeBSD-2.2.2 box and I suppose
that these hangings are related with ethernet. Before hanging I have the
following dump on console from arpwatch:

Jul 30 21:09:55 nic arpwatch: 0:c0:5:1:7:9c sent packet not ETHERTYPE_IP
(0x811) 
Jul 30 21:09:55 nic arpwatch: 0:c0:5:1:7:9c sent bad hardware format
0xff 
Jul 30 21:09:55 nic arpwatch: 0:c0:5:1:7:9c sent bad addr len (hard 6,
prot 19) 
Jul 30 21:09:55 nic arpwatch: 0:c0:5:1:7:9c sent packet not ETHERTYPE_IP
(0x811) 
Jul 30 21:10:43 nic arpwatch: 0:c0:5:1:7:9c sent bad hardware format
0xff 
Jul 30 21:10:43 nic arpwatch: 0:c0:5:1:7:9c sent bad addr len (hard 255,
prot 255) 
Jul 30 21:11:13 nic arpwatch: 0:c0:5:1:7:9c sent wrong arp op 21 
Jul 30 21:11:13 nic arpwatch: 0:c0:5:1:7:9c sent bad addr len (hard 70,
prot 4) 
Jul 30 21:11:44 nic arpwatch: 0:c0:5:1:7:9c sent bad hardware format
0xff 

then system immediately freezes.

0:c0:5:1:7:9c is our Livingston Enterprises PM-2e terminal server which
is a default gateway in our network.

our LAN is 10-base-2 based. I tried to change the card in BSD box - it
didn't help. 

We have another FreeBSD box (which is 2.1.5 actually) on the same net
and it also hangs almost simultaneously with mine when these Ethernet
problems are starting.

Please advise what is the problem? A buggy ethernet card in our LAN?
Why FreeBSD should hang because of Ethernet problems? 
What are that "bad hardware format" ARP problems?

Please help!

Regards,
Sam

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