From owner-freebsd-net  Mon Feb  5 14:17:40 2001
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From: Luigi Rizzo <rizzo@aciri.org>
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Subject: Re: BRIDGE breaks ARP? (more info)
In-Reply-To: <20010205215641.59637.richw@wyattearp.stanford.edu> from Rich Wales at "Feb 5, 2001  2: 2:53 pm"
To: richw@webcom.com (Rich Wales)
Date: Mon, 5 Feb 2001 14:15:26 -0800 (PST)
Cc: rizzo@aciri.org, julian@elischer.org, patrick@netzuno.com,
	freebsd-net@FreeBSD.ORG, julian@FreeBSD.ORG
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> Luigi Rizzo wrote:
> 
>     > it looks like it essentially reverts to the old (1.75) behaviour,
>     > . . .  when bridging is compiled in (and now, when bridging is
>     > enabled), arp requests do not consider the interface from which
>     > the request came from. . . .  there are some cases where you are
>     > doing bridging separately on clusters of interfaces, . . .
> 
> In my case, I want to maintain two distinct clusters on my bridge --
> one cluster with publicly accessible IP addresses (part of the Internet
> at large), and another cluster with private IP addresses (for a local
> network that is allowed to access the Internet only through proxies).
> 
> If I implement Julian's mod in my bridge, am I going to run into
> problems with misdirected ARP packets?  Or should I be safe because
> my two clusters are dealing with completely separate groups of IP
> addresses (one external, the other internal)?

the answer is in the first line... it will be the same as before.
There are surely situation where you can have misbehaviours,
though i cannot think of an easy and general example.

	cheers
	luigi


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