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From: ted@braggvax.arpa
Newsgroups: comp.unix.wizards
Subject: Re: Trouble with Ethernet
Message-ID: <9481@brl-adm.ARPA>
Date: Thu, 24-Sep-87 23:28:07 EDT
Article-I.D.: brl-adm.9481
Posted: Thu Sep 24 23:28:07 1987
Date-Received: Sat, 26-Sep-87 14:39:28 EDT
Sender: news@brl-adm.ARPA
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This works with two different class C nets on one ethernet, haven't
tried it with a class C and a class B, but:

Suppose you have two machines, one is 192.5.92.1, the other 192.5.121.1
Now, if you put these on the same physical ethernet, they will be unable
to talk, unless you do

	       on the 192.5.92.1 machine

		      route add 192.5.121.0 192.5.92.1 0

	       and on the 192.5.121.1 machine

		      route add 192.5.92.0 192.5.121.1 0
	             	
This works with SunOS 1.X and 2.X and 4.3BSD (presumably works on all
BSD offshoots).  Naturally you can use hostnames instead of numbers.
It's nice for short vsitations of "foreign" machines to an ethernet,
but in the long-run you probably want everything on the same logical net.

			       Ted Nolan
			       ted@braggvax.arpa