[363] in linux-net channel archive
Re: tunnel devices (pre-1.3 net snapshot): intended use?
daemon@ATHENA.MIT.EDU (Fons Botman)
Mon May 22 18:36:54 1995
To: linux-net@vger.rutgers.edu
Date: Mon, 22 May 95 23:27:29 MET
From: Fons Botman <ND3995!botman@relay.NL.net>
In-Reply-To: <Pine.A32.3.91lp.950522184311.19421C-100000@amsu01.AMS.Medizin.Uni-Goettingen.DE>; from "Lutz Pressler" at May 22, 95 7:12 pm
Reply-To: botman@rabo.nl
> On Sun, 21 May 1995, Lutz Pressler (that's me...) wrote:
> ...
> What I really was thinking about is something like a remote Ethernet bridge
> with an IP link as the connection. That would copy every (*) packet from
> an Ethernet interface via the IP link to another host which "sees" this
> "bridge device" as another Ethernet interface.
> (*) "every" would be quite bad, of course. Filtering by protocol should be
> possible, so should be by destination address (maybe dynamically).
> The Ethernet interface has to be in multicast or promisc mode,
> naturally.
> This "generic bridging over IP" would allow transport of multiple protocol
> traffic (IPX, AppleTalk, DECnet/LAT/LAST, ...) over IP-only (serial) links.
> Is there any reason for this beeing infeasible? Maybe I just had a black
No. Most things will work.
> out.. Or is there anything like this done already? I haven't found a
> suitable RFC..
> Comments welcome.
> >
> > - background: A generic tunneling mechanism would be a way to send IPX
> > (or AppleTalk, ..) packets over an IP-only link (especially SLIP, PPP
> > [the current PPP implementation only handles IP, correct? Is this
> > going to change (soon)?]).
> > Is there any other method to do this? We have an application which uses
> > IPX and would be nice for home (=PPP) usage.
> Fons Botman <botman@rabo.nl> sent me an ALPHA version of an IPX over IP
> tunneling daemon, which I will try out (as time permits).
There are some versions op a program called "ipxbridge" on tsx-11 under
this name or in a recent "dosemu" package.
"ipxbridge" and "iptunnel" contain most buildingblocks to create such
a program. But this will require time :-)
Obvious warning: bridging is more general, but can cost more bandwith.
The Fons
>
> Have a nice day,
> Lutz
>
> --
> Lutz Pre"sler <URL:http://www.AMS.Medizin.Uni-Goettingen.DE/~lpressl1/>
> Systemverwaltung -- Abt. Medizinische Statistik, Universit"at G"ottingen
> Humboldtallee 32, D-37073 G"ottingen, Tel.: +49(0551) 39-4956 FAX: -4995
> <Lutz.Pressler@AMS.Medizin.Uni-Goettingen.DE> [PGP-key:WWW&keys.] IRC:lp
