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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!seismo!mcvax!jaap
From: jaap@mcvax.UUCP (Jaap Akkerhuis)
Newsgroups: net.dcom,net.lan
Subject: Re: Ethernet compatability
Message-ID: <804@mcvax.UUCP>
Date: Mon, 16-Sep-85 22:59:52 EDT
Article-I.D.: mcvax.804
Posted: Mon Sep 16 22:59:52 1985
Date-Received: Wed, 18-Sep-85 04:11:30 EDT
References: <391@brl-sem.ARPA> <458@mtxinu.UUCP>
Reply-To: jaap@mcvax.UUCP (Jaap Akkerhuis)
Distribution: net
Organization: CWI, Amsterdam
Lines: 25
Xref: watmath net.dcom:1301 net.lan:1027

In article <458@mtxinu.UUCP> ed@mtxinu.UUCP (Ed Gould) writes:
 > 
 > The DEC devices are Ethernet 2 (compatible with IEEE 802.3), while the
 > 3Com transcievers are Ethernet 1.  They're compatible on the ether
 > side, but not on the device side (i.e., you can mix 3Com's and others
 > on the same Ethernet, but you can't match a 3Com transciever to
 > a DEUNA).
 > 

Yes, the only difference between the Ethernet 1 & 2 are in the connection
between the transceiver and the (host)controller. On the coax cable the two
versions are supposed to be compatible.

However, I noticed that the SUN-2/50 Ethernet controller (Ethernet 1, using a
3Com transceiver) seems to be broken.
Looks like it will not properly talk to a DEUNA (using a H-4000 transceiver). 
The symptoms are that it will not do rcp, rlogin etc. properly, the
connections are terribly slow (if they don't time out), echoing by rlogin
takes an unreasonable amount of seconds.

If anybody else has seen this problem and has (maybe) a fix for it, send me
mail. I'll summarise to this group.

	Jaap Akkerhuis.
	{seismo,decvax}!mcvax!jaap


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