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Date:      Mon, 20 Dec 1999 14:37:14 +0100 (CET)
From:      Luigi Rizzo <luigi@info.iet.unipi.it>
To:        nsayer@quack.kfu.com
Cc:        mobile@FreeBSD.org, luigi@FreeBSD.org
Subject:   Re: Wavelan wireless ethernet cards & bridging
Message-ID:  <199912201337.OAA10862@info.iet.unipi.it>
In-Reply-To: <199912192222.OAA94654@morpheus.kfu.com> from "nsayer@quack.kfu.com" at "Dec 19, 1999 02:22:03 pm"

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Hi,

i seem to recall from some msg that the Wavelan (the PCMCIA one,
supported by the "wi" driver) is unable to transmit pkts with a
different MAC address than its own.

This would prevent bridging from working at all, unless you implement
some workaround (basically encapsulate and decapsulate pkts, kind
of "Ethernet-in-Ethernet") at which point you probably can easily
forget bridging and go with plain routing/NAT ?

Of course you should check with Bill Paul for the correctness of the
first sentence.

	cheers
	luigi


> I haven't bought one yet, but I have become interested lately in
> wireless LAN stuff. It looks like the WaveLAN Turbo cards are the
> way to go. The only issue is that they require a WAP (wired access
> point) to communicate with wired networks. Those devices, from what
> I can tell A> are horribly expensive, and B> don't do 100baseT
> (which is only important because it's all I've got at home).
> 
> It seems to me that the solution to both problems is in Luigi's
> bridging code, which I already use to make a filtering bridge to
> use with my DSL router.
> 
> If the wi driver could be made bridge-aware, it seems to me that
> one could add an ISA-PCMCIA bridge card with a Wavelan card to
> an AdHoc network and use it as a bridge to the wired network.
> 
> Some issues, however, make me too nervous to stick my neck out and
> try it. Paramount above them is what the bridge code would do if an
> interface was suddenly added or removed (as PCCARD devices are wont
> to do, and there is no such thing as a true ISA or PCI WaveLAN card).
> 
> Adding the bridge code call to the wi driver looks pretty straightforward.
> Does anyone have any thoughts as to the likelyhood of this being a
> complete waste of time?
> 
> 



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