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From: steve@BRILLIG.UMD.EDU (Steve D. Miller)
Newsgroups: comp.sys.pyramid
Subject: Re:  Pyramid and Sun net problems?
Message-ID: <8711171534.AA05657@brillig.umd.edu>
Date: Tue, 17-Nov-87 10:34:02 EST
Article-I.D.: brillig.8711171534.AA05657
Posted: Tue Nov 17 10:34:02 1987
Date-Received: Thu, 19-Nov-87 20:37:54 EST
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   The Suns send out huge (ballpark 4K) UDP packets when doing NFS reads and
writes.  These packets get fragmented at the IP level into three
back-to-back large IP packets; if the Pyramid Ethernet controller or
software is slow, it could end up dropping one or more of those IP packets.
This can be controlled by using the rsize and wsize options when you do a
cross-mount.  (Setting these to 2K should help.)  There should be something
in the Sun mount(8) man entry about this, and I would hope that the option
appears on the Pyramid side, too.

   This same sort of thing happens between Sun-2s with 3Com Ethernet cards
and Sun-3s.  Fiddling this stuff might not help, but if you haven't tried,
you should.

   Good luck.

	-Steve

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