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Date:      Thu, 16 Sep 2021 08:33:58 +0200 (CEST)
From:      sthaug@nethelp.no
To:        karels@freebsd.org
Cc:        bzeeb-lists@lists.zabbadoz.net, freebsd-net@freebsd.org
Subject:   Re: change to deprecate broadcast on host 0 of a subnet
Message-ID:  <20210916.083358.257871963.sthaug@nethelp.no>
In-Reply-To: <202109152318.18FNI24k082607@mail.karels.net>
References:  <E3AF2A1B-A44D-4526-BD8B-7C0003D256EF@lists.zabbadoz.net> <202109152318.18FNI24k082607@mail.karels.net>

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>> I would prefer if the current behaviour stayed default (would also MFC 
>> better)
>> and then flip if this will indeed go anywhere.
> 
> I considered that, but I think that the current behavior is simply
> wrong.  We broadcast packets to the lowest address on the net, but
> we don't receive these broadcasts as such.  I was surprised to find
> that we were still broadcasting these packets.  I can't think of any
> reason we should do that.
> 
> Any other opinions on the default setting of the sysctl?

I welcome a change to stop broadcasting the lowest address on a
subnet. Yes this should have been done years ago.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no



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