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documentation calls the 3C100's Level 1 and the DELNI's Level 2. Most of the
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equipment attached to the DELNI's and the DEMPR is configured for Level 2.
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The HP switches between 802.3 and Level 1, and is at Level 1. This is the
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scene as I discovered it -- I never suspected that we didn't have level 2
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tranceivers. I get intermittent pairs of "server not responding/server ok"
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messages on Suns when both the machines and the net are relatively quiet, and
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doing sprays between machines sometimes shows 0% loss, sometimes up to 65%
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loss. The HP consistently loses 95% when sprayed. Diskless machines often
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boot extremely slowly.
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Hardware on the net:
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HP 9000/320
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Sun 2/50,2/120,3/50,3/60,3/180,3/280,4/110
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PC clone with 3C503 (?) ethernet board (usually turned off)
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Apollo DN3000
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IBM RT (AIX)
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MicroVax II,2000 (Ultrix and VMS)
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The Ultrix machine has trailers disabled.
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The Questions:
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Are my tranceivers losing terribly? Should I replace them with
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level 2 tranceivers? What level(2) are the DELNI and the DEMPR?
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Should I get a thinnet thing for the HP and run it at 802.3 over
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thinnet?
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--
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@disclaimer(Any concepts or opinions above are entirely mine, not those of my
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employer, my GIGI, my VT05, or my 11/34)
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beak is@>beak is not
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Anthony A. Datri @SysAdmin(Stepstone Corporation) aad@stepstone.com stpstn!aad
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Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!sun!pitstop!texsun!convex!uunet!mcvax!ukc!etive!lfcs!bct
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From: bct@lfcs.ed.ac.uk (Brian Tompsett)
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Newsgroups: comp.dcom.lans
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Subject: Re: x.25 server for tcp/ip
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Message-ID: <1369@etive.ed.ac.uk>
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Date: 13 Feb 89 09:48:15 GMT
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References: <333@pbseps.UUCP>
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Sender: news@etive.ed.ac.uk
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Reply-To: bct@lfcs.ed.ac.uk (Brian Tompsett)
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Organization: Dept. of Computer Science, Edinburgh University, U.K.
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Lines: 22
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In article <333@pbseps.UUCP> rdp@pbseps.PacBell.COM (Richard Perlman) writes:
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>We are looking for an x.25 Server for a TCP/IP ethernet. [...]
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>
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>It would also be nice to be able to use the x.25 server as a
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>TCP/IP gateway between a local UNIX host and some distant
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>network.
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You should look at boxes made by Spider. They specialise in this kind of
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product. Some literature just arrived on my desk this morning about a TCP/IP
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router via X.25. They also do X.25 WAN to X.25 LAN via ether boxes and all
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kinds of other goodies.
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They have an office in Burlington Mass. (617 270 3510).
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We have an X.25/Ether gateway here and it acts as the X.25 gate for 6 or
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so main frames. Seems to work OK.
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Brian.
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> Brian Tompsett. Department of Computer Science, University of Edinburgh,
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> JCMB, The King's Buildings, Mayfield Road, EDINBURGH, EH9 3JZ, Scotland, U.K.
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> Telephone: +44 31 667 1081 x2711.
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> JANET: bct@uk.ac.ed.ecsvax ARPA: bct%ed.ecsvax@nss.cs.ucl.ac.uk
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Path: utzoo!attcan!uunet!mcvax!hp4nl!kunivv1!atcmpe!gertjan
|
From: gertjan@atcmp.nl (Gertjan Vinkesteyn)
|
Newsgroups: comp.dcom.lans
|
Subject: Re: NFS vs RFS
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Message-ID: <478@atcmpe.atcmp.nl>
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Date: 6 Feb 89 17:59:13 GMT
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References: <9018@cit-vax.Caltech.Edu> <7387@chinet.chi.il.us> <463@maxim.ERBE.SE>
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Organization: AT Computing, Nijmegen, The Netherlands
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Lines: 12
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In article <463@maxim.ERBE.SE>, prc@maxim.ERBE.SE (Robert Claeson) writes:
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> In article <Jan.18.22.05.48.1989.264@geneva.rutgers.edu>, hedrick@geneva.rutgers.edu (Charles Hedrick) writes:
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> The NFS locking protocol doesn't support the SVID's mandatory locking,
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> but only the advisory locking. I guess it will be hard to implement
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> mandatory locking in a stateless environment like NFS.
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Mandatory locking is part of SystemV Release 3, not in Berkeley releases
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--
|
UUCP and other network )\/( ..!hp4nl!kunivv1!atcmpe!gertjan
|
connections via mcvax )/\( gertjan@atcmp.nl (internet)
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This note does not necessarily represent the position of AT Computing BV
|
Xref: utzoo comp.dcom.lans:2389 comp.sys.ibm.pc:24673
|
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!haven!umbc3!digennar
|
From: digennar@umbc3.UMBC.EDU (Mr. Jerry DiGennaro)
|
Newsgroups: comp.dcom.lans,comp.sys.ibm.pc
|
Subject: Re: Lattisnet/Ethernet over Twisted Pair
|
Message-ID: <1653@umbc3.UMBC.EDU>
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Date: 14 Feb 89 03:07:41 GMT
|
References: <98@cs.columbia.edu>
|
Reply-To: digennar@umbc3.umbc.edu.UMBC.EDU (Mr. Jerry DiGennaro)
|
Organization: University of Maryland, Baltimore County
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Lines: 22
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