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Date:      Tue, 18 Sep 2001 19:05:21 -0700 (PDT)
From:      Julian Elischer <julian@elischer.org>
To:        Mike Saunders <method@method.cx>
Cc:        Lars Eggert <larse@ISI.EDU>, freebsd-net@freebsd.org
Subject:   RE: kernel arp messages
Message-ID:  <Pine.BSF.4.21.0109181856480.23317-100000@InterJet.elischer.org>
In-Reply-To: <Pine.NEB.4.21.0109181955150.7737-100000@schizo.method.cx>

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On Tue, 18 Sep 2001, Mike Saunders wrote:

> Thanks for all the replies gentlemen!  I'll try to clear some things up
> here:
> 
> On Tue, 18 Sep 2001, Lars Eggert wrote:
> 
> > Date: Tue, 18 Sep 2001 17:31:24 -0800
> > From: Lars Eggert <larse@ISI.EDU>
> > To: Mike Saunders <method@method.cx>, freebsd-net@freebsd.org
> > Subject: RE: kernel arp messages
> > 
> > > Sep 18 15:01:54 router /kernel: arp: 209.74.87.1 is on lo0 but got reply
> > > from 00:60:08:35:57:4e on xl0
> > 
> > And this is *really* ugly! Are you proxy-arping? Someone is advertising
> > one of your local IP addresses.
> 

how did that address get on lo0?
what is netstat -r (or ifconfig) showing?


> Actually Lars,
> 	If you notice the MAC, it's the same as:
>  
> ep0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         inet 209.74.87.1 netmask 0xffffff00 broadcast 209.74.87.255
>         ether 00:60:08:35:57:4e
> 
> So 209.74.87.1 is on ep0 which is on lo0 but gets caught at xl0, according
> to this machine.


ep0 is NOT "ON" lo0
What makes you say  that strange thing?




> 
> So maybe a picture will help
> 
> 			|
> 			|
> 			|
> 		   209.74.92/24
> 			|
> 		      (xl0)
> 		  FreeBSD Router
> 		      (ep0)
> 			|
> 		   209.74.87/24
> 			|
> 		     switches
> 
> This is what I believe to be the current set up.  Now that I read the
> email mentioning the loop, it's possible that somebody has thrown in a hub
> connecting both networks.  I know there's one in the closet.  I'll have to
> go and check.

that would be my guess.

> 
> 	Ideally, all I'm trying to do is route one class C into my

what is  the link to the provider?


> provider's network.  I just want a router, it happens to be running
> FreeBSD instead of IOS.
> 
> I'll have to go take a look at the cabling setups though.  Thanks for the
> tips everybody.
> 
> -Mike
> method@method.cx
> 
> 
> > 
> > Again, I think a picture of your setup would help. It sounds like you're
> > simply trying to set up a FreeBSD router between to networks, this should
> > not be so complicated.
> > 
> > Lars
> > --
> > Lars Eggert <larse@isi.edu>               Information Sciences Institute
> > http://www.isi.edu/larse/              University of Southern California
> > 
> 
> 
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> 


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