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From: weber@brand.usc.edu (Allan G. Weber)
Newsgroups: comp.unix.wizards
Subject: Need help on MicroVAX-II ethernet crash problems
Message-ID: <4195@oberon.USC.EDU>
Date: Mon, 24-Aug-87 11:56:46 EDT
Article-I.D.: oberon.4195
Posted: Mon Aug 24 11:56:46 1987
Date-Received: Tue, 25-Aug-87 02:29:12 EDT
Sender: nobody@oberon.USC.EDU
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Lines: 20
Keywords: Ultrix, MicroVAX, ethernet, DEQNA


I have a MicroVAX-II running Ultrix 1.2A that seems to die when the
ethernet traffic gets very heavy.  Whenever the ethernet gets jammed
up with traffic because of other nodes sending out broadcasts, the
probability of the machine crashing goes way up.  Our SUN systems just
print out a message about the ethernet being jammed but the MicroVAX
often crashes when this happens.  All the core dumps I've looked at
seem to point to some problem in the DEQNA driver.  Has anybody else
seen this happen?  If so, does DEC know about it and is it fixed in
Ultrix 2.0?  Is there a fix for it that can be applied to Ultrix 1.2A?
DEC field service replaced the DEQNA board with no improvement so I
don't think its a hardware problem with the board.  However, we do
have two device drivers of our own in the system running lab devices
so I can't rule out it being due to our software.  Any help will be
appreciated.  Thanks.

				Allan Weber
				USC Signal and Images Processing Institute
				Arpa:	weber%brand.usc.edu@oberon.usc.edu
				UUCP:	...sdcrdcf!oberon!brand!weber