From owner-freebsd-net  Sun Jan  6 23:46:43 2002
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Date: Sun, 6 Jan 2002 23:46:11 -0800
From: "Crist J. Clark" <cristjc@earthlink.net>
To: Len Conrad <LConrad@Go2France.com>
Cc: Freebsd-questions@FreeBSD.ORG, freebsd-net@FreeBSD.ORG
Subject: Re: multi-NIC broadcasting: it isn't
Message-ID: <20020106234611.J2029@gohan.cjclark.org>
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In-Reply-To: <5.1.0.14.2.20020105114006.0291fec0@mail.Go2France.com>; from LConrad@Go2France.com on Sun, Jan 06, 2002 at 09:29:42PM -0600
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On Sun, Jan 06, 2002 at 09:29:42PM -0600, Len Conrad wrote:
> 4.4-20020101-STABLE with 5 nics
> 
> ifconfig_fxp0="inet 10.1.1.1 netmask 255.255.255.0 media autoselect"
> ifconfig_fxp1="inet 10.1.2.1 netmask 255.255.255.0 media autoselect"
> ifconfig_fxp2="inet 192.168.253.59 netmask 255.255.255.0 media autoselect"
> ifconfig_fxp3="inet 10.1.4.1 netmask 255.255.255.0 media autoselect"
> ifconfig_fxp4="inet 10.1.5.1 netmask 255.255.255.0 media autoselect"
> 
> we can ping from a PC on net 10.1.5.0/24 to a PC on net 10.1.1.0/24, so box 
> as gateway and routing are working.
> 
> then send broadcasts from the PC on 10.1.5.0/24 to these ports:
> 
> 255.255.255.255 port 26790
> 255.255.255.255 port 26791
> 255.255.255.255 port 26792
> 255.255.255.255 port 26793
> 
> trafshow indicates that broadcasts originate on 10.1.5.0/24, but nothing 
> appears on the other nets.
> 
> Suggestions where to look?

Uh, nowhere? That is the required behavior. 255.255.255.255 is the
_local_ broadcast address. It never crosses a router.
-- 
"It's always funny until someone gets hurt. Then it's hilarious."

Crist J. Clark                     |     cjclark@alum.mit.edu
                                   |     cjclark@jhu.edu
http://people.freebsd.org/~cjc/    |     cjc@freebsd.org

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