Xref: utzoo comp.unix.ultrix:997 comp.sys.dec:1319
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.ultrix,comp.sys.dec
Subject: Re: chained packet panic on DEQNA (uvaxII) ?
Message-ID: <1716@auspex.auspex.com>
Date: 31 May 89 00:24:06 GMT
References: <2717@helios.ee.lbl.gov> <6971@cbmvax.UUCP>
Reply-To: guy@auspex.auspex.com (Guy Harris)
Organization: Auspex Systems, Santa Clara
Lines: 16

>I've heard that sun NFS will use big packets, but there are parameters
>in fstab to control this.

Sun's RPC/NFS implementation will use big *UDP* packets - the size of
these is controlled by parameters in "fstab" - but by the time it gets
to the link layer IP should have busted them up into properly-sized
fragments if necessary.  The BSD IP code, which is used in SunOS and,
presumably, Ultrix (and probably 99 44/100% of the UNIX TCP/UDP/IP
implementations out there, as well as a lot of *non*-UNIX
implementations), will do this.

If a machine puts out Ethergrams longer than 1500 bytes, it's being
*very* antisocial, except maybe if it's talking to other consenting
adults.  If you're using Internet-family protocols (TCP/UDP/IP/etc.),
it's basically the responsibility of IP to ensure that your machine is
not being antisocial.