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Date:      Wed, 3 Mar 2004 01:48:35 +1100 (EST)
From:      Ian Smith <smithi@nimnet.asn.au>
To:        Andre Oppermann <andre@freebsd.org>
Cc:        freebsd-net@freebsd.org
Subject:   Re: My planned work on networking stack
Message-ID:  <Pine.BSF.3.96.1040303012627.26013L-100000@gaia.nimnet.asn.au>
In-Reply-To: <4044928C.AF49FD38@freebsd.org>

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[-current out of ccs, I'm not subscribed]

On Tue, 2 Mar 2004, Andre Oppermann wrote to Wes Peters:

 > > Wowsers.  I can't wait to hear more.  When do you expect to have a design
 > > for the ARP stuff and TCP buffer sizing, since they are underway?
 > 
 > The ARP stuff is pretty simple and is a hash list IP->MAC per ethernet
 > (actually 802.1) broadcast domain.  The harder part is to move all the
 > code to one place from it's various net/* and netinet/* files.  As a
 > nice side effect we get per-MAC accounting (octets, frames) for free.

What about bridged interfaces that have a MAC, but no IP address?  I'm
still trying to figure this one out for a (4.8-R) bridge that's working
fine but still has some issues with ARP confusion and thus repeated ARP
requests from the upstream / outside router, esp regarding broadcast UDP
traffic, where the inside interface has the one IP and thus broadcast
address, for broadcast packets delivered locally to the bridge's IP? 

I realise this is a bridge issue, but it's how it interacts with ARP.

The rest of this is well out of my league, but fascinating reading :)

Cheers, Ian



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