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Date:      Mon, 01 Jun 1998 21:32:13 -0700
From:      David Greenman <dg@root.com>
To:        Scott Drassinower <scottd@cloud9.net>
Cc:        freebsd-hardware@FreeBSD.ORG
Subject:   Re: Intel EtherExpress 100+ problems 
Message-ID:  <199806020432.VAA12291@implode.root.com>
In-Reply-To: Your message of "Mon, 01 Jun 1998 10:07:09 EDT." <Pine.BSF.3.96.980601100549.6444D-100000@earl-grey.cloud9.net> 

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>So the problem that I'm having with NFS will likely occur with a 3Com or
>SMC card as well?  There is no workaround at all for this, just deal with
>messed up nfs or run at 10 megabits? 

   I was only suggesting that our NFS has problems in some corner cases.
Usually this only shows up when there are multiple clients writing to the
same file, and the usual result is file corruption, not a client/server
wedge. Our NFS also doesn't recover properly from certain kinds of failures.
All of these issues are being looked at in -current and there have been a
few fixes that have trickled back to -stable...not that I think those will
fix your problem, however. I think your troubles are at the link level and
are symptoms of packet loss.
   Try setting both sides to forced 100/half. I've had some compatiblity
problems with Cisco router-switches when connected to other vendor switches
in 100/full. For some reason switching to half duplex causes the problems
to go away (and it's not actually a duplex problem as that was verified to
be correct on both ends...weird).
   I haven't seen the problems you are having with NFS and the Cisco/Intel
combination. It sounds like there is packet loss in some cases which is
causing NFS clients to wedge. Are you sure that your cable is up to spec?
Are there any interface errors on either side?

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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