Hello,
Has anyone had problems with Turbochannel DEFTA FDDI card (fta0) and
multicast packets? They seem to cause Network Hardware Fault for the card:
Mar 6 18:53:04 alpha vmunix: fta0: Illegal length, packet dropped; len = 6175
Mar 6 18:53:04 alpha vmunix: fta0: Link Unavailable.
Mar 6 18:53:07 alpha vmunix: fta0: Halted.
Mar 6 18:53:07 alpha vmunix: fta0: Halt Reason: Network Hardware Fault
Mar 6 18:53:07 alpha vmunix: fta0: Link Unavailable.
Mar 6 18:53:08 alpha vmunix: fta0: Link Available.
Although there in a message 'Link Available' the only thing we can do
is to reboot the machine in order to get anything through fta0.
We use Digital Unix V3.2C. Last month we upgraded the firmaware for the
machine and for the fta0 card but it did not help. We also replaced
the ftao card and changed the fiber cables and the concentrator where
the machine is connected. No help.
The other DEC 3000s which have older DEFZA (fza0) card receive also
too long packets but they are ok.
The reason seems to be MBONE traffic which uses multicast packets.
As soon as we configure any of our Cisco routers in our FDDI ring
to act multicast routers the DEC 3000 with fta0 hangs (uptime for the
DEC 3000 is only a few hours). If we do not use Ciscos as multicast
routers the uptime increases to a couple of days.
Is it possible to configure the kernel to ignore multicast packets?
Or how to avoid these hangs?
Jukka Helin
Tampere University of Technology
Institute of Advanced Computing
P.O.Box 692, FIN-33101 Tampere, FINLAND
tel. +358-31-316 2388, fax +358-31-316 2172
email helin_at_iac.tut.fi
Received on Wed Mar 06 1996 - 20:01:28 NZDT