*BSD News Article 93269


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From: Dominic Froud <dom@dominic.dcs.qmw.ac.uk>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: PLIP: help -- handshaking failing!
Date: 10 Apr 1997 11:51:37 +0100
Organization: Queen Mary & Westfield College, London, UK
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I have a kosher, yellow, laplink cable between two FreeBSD-2.2
machines and I'm trying to establish a PLIP connection. I can ifconfig
the two machines and I've enabled debugging in the lpt.c module.

When I try to ping a machine, it does actaully send every byte but
viewing the lines using a logic analyser shows that the handshaking
lines sit (for the most part) at one level and only occasionally
flip. (I know they should alternate if things are working okay).

The remote machine replies (with what I don't know) and this is
received back at the originating machine as a long list made up of
0x6x [reconstituted] bytes. Same results in either direction.

I've set both parallel ports to "SPP" mode and I've tried using
another machine (a Compaq Proliant) in various combinations to no
avail. I soldered up another cable with no joy either.

Can anyone offer any more help in this direction?

Logic analyser traces available on request!

Dominic Froud
-- 
Postmaster/Programmer,
Computer Science Department, Queen Mary & Westfield College, London University