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From: jms@tardis.tymnet.com (Joe Smith)
Newsgroups: comp.sys.sun
Subject: Re: Switching from thin to thick Ethernet on a Sun 3/50
Keywords: Networks
Message-ID: <1990Oct7.231728.4658@rice.edu>
Date: 7 Oct 90 21:30:00 GMT
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X-Sun-Spots-Digest: Volume 9, Issue 340, message 5
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>In article <1990Aug13.011115.5713@rice.edu>, matt@antioch.acns.nwu.edu (Matthew Larson) writes:
>> We have a Sun 3/50 that was running happily using thin ethernet.  Now we
>> would like to run it with thick ethernet.  We plugged in the drop cable
>> and -- nothing.  For the record, it is running SunOS 4.1.
>> Rumor has it that there is a jumper change required to effect this change.
>> Could some kind soul tell us how to do this?

You should really try to get a copy of the "Hardware Installation Manual
for the Sun-3/50M".  (One comes as original equipment with each
workstation.) The information you need in on page 25.  If you pull the
board out of the 3/50, you will find a block of 8 dip switches in the
vicinity of the ethernet connections.  All 8 of them must be to the left
for thin ethernet (the BNC connector), all 8 of them must be to the right
for thick ethernet (the 15-pin connector).

In article <1990Aug23.225108.9759@rice.edu> soleil!dipaola@rutgers.edu
 (Len DiPaola) writes:
: 4 Mb    8 Mb    12 Mb   16 Mb   20 Mb   24 Mb   EXTXUR  HIGHRES
: 
:   o       o       o       o       o       o       o       o
:   |                                               |
:   o       o       o       o       o       o       o       o
: 
: (		MEMORY JUMPERS		)	(Net)	(Monitor)
: 
: If the seventh jumper ("EXTXUR") is in place, then the machine is
: configured for Thicknet.  Otherwise, it's configured for Thinnet.  These
: jumpers are located (if you've looking at the board with the external
: connectors facing you) to the left of center about 10-12 inches back.
: They're pretty easy to spot, 'cause they're the only jumpers back there.

Len's information is correct for the Sun-3/60, but Matt has a Sun-3/50.

Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com
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