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Re: IGRP

daemon@ATHENA.MIT.EDU (ATPlack@scj.com)
Tue Mar 26 16:23:10 1996

From: ATPlack@scj.com
Date: 	26 Mar 96 13:36:29 -0600
To: csd@microplex.com
Cc: linux-net@vger.rutgers.edu, linux-ppp@vger.rutgers.edu


I have one NT box, one Novell server (set up as a IP router), one 
Workstation (WFW 3.11), and one Linux box.

The Novell server, workstation and NT box have the default route as the 
Linux box.  The Linux box has the default route through the PPP link.

gated is not running.

I am not able to Ping from the NT, Novell, or Workstation to the other side 
of the Linux box.

When I do an IPtrace from the workstation, I can see the RIP from the Novell 
server and the Linux box (and some stupid NETBIOS broadcasts from the NT 
box).

I have enabled packet forwarding on the kernel and recompiled.  The RIP 
packets look correct from the Linux box.

During a PING on the NT box, it returns a message that indicates the Linux 
box rejecting that route as unreachable.

A ping from the Linux box across the link works okay.  Only the Linux box 
can communicate across the link.

According to the NET-2 How-To.  I do not see any other piece that should be 
needed.

Why is the Linux box not routing the packets?

Since I see the RIP packets, why would I need gated?
 ----------
From: csd@microplex.com
To: Plack, Anthony, T.
Cc: linux-net@vger.rutgers.edu; linux-ppp@vger.rutgers.edu
Subject: Re: IGRP
Date: Tuesday, March 26, 1996 3:55AM

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> I have a great connection to the network now through the PPP link.
However,
> that is only on my linux machine.
>
> I assume that gated will help get the route available to the other 
machines
> on my local Ethernet segment.  If not, someone let me know.  I am going to 

> try this this week.
 It shouldn't. Host computers should not get their routing info from
routing protocol updates. Gated is there to make routers talk to
themselves. You'll probably need to configure at least the default
gateway on the other machines. The rest should sort itself out from there

> My primary concern is that I might need to support IGRP.  See the network
> guys here have disabled RIP on all networks at our sight in favor of IGRP
> from Cisco.
>
> Any ideas on support for this through Linux.
>
As far as I know, IGRP is proprietary and cisco has patents on some
portions of it, so I don't think you'll get Linux boxes talking IGRP
anytime soon.
 (Could someone confirm/deny this info that I have?)

cheers,

 Christian.

 --
 ----------------------------------------------------------------
Christian Daudt (csd@microplex.com)            Software Engineer
Microplex Systems Ltd.            URL: http://www.microplex.com/
"You can tell how far we have to go, when FORTRAN is the language of
supercomputers."   -- Steven Feiner





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