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Date:      Fri, 6 Nov 1998 17:07:00 -0500 (EST)
From:      mike@seidata.com
To:        Bill Fenner <fenner@parc.xerox.com>
Cc:        Dmitry Eremin <dmiter@sci-nnov.ru>, freebsd-current@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG
Subject:   Re: /kernel: arp: 192.168.1.188 is on de1 but got reply from 00:c0:4f:a4:81:2d on de0 
Message-ID:  <Pine.BSF.4.05.9811061654360.17661-100000@ns1.seidata.com>
In-Reply-To: <199811061638.IAA28819@mango.parc.xerox.com>

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On Fri, 6 Nov 1998, Bill Fenner wrote:

> FreeBSD doesn't send ARP requests out multiple interfaces, so perhaps
> you have something funny going on at layer 2 (e.g. shared hub between
> the two different networks, or a broken switch)?

Broken switch? *sigh*  I've got (they've died off lately, but were
much more frequent when I first implemented the BSD-based NAT box) the
same sort of error here with the following setup:

       +---------------+
 LAN1--| Catalyst 1900 |
       +---------------+  +-------------+  +---------------+
 LAN2--| Catalyst 1900 |--| FreeBSD 3.0 |--| Catalyst 2940 |--INET
       +---------------+  +-------------+  +---------------+
 LAN3--| Catalyst 1900 |                   | Catalyst 1900 |
       +---------------+                   +---------------+

The Catalyst 1900's on the left provide 10BT connectivity to three
local nets (10.0.1, 10.0.2, 10.0.3) and connect to the BSD box via
100BT.  They are daisey-chained via standard cross over cables using
their 100BT uplink ports.  LAN's 1-3 and Windows 95, Windows NT and
Macintosh LANs.  They undergo packet filtering and NAT at the BSD box.
The Catalyst 2940 and 1900 switches on the right provide 100BT and
10BT connectivity (repsectively) for servers I have 'outside' of my
firewall (FreeBSD shell, FTP, personal WWW, etc. servers).

Just FYI, maybe my setup will be similar to his in some way and
present an obvious design flaw.

Later,

	-mike


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