well, ARPs still take up bandwidth, and I'm not sure the scale you're talking 
about.  I would recommend a tiered structure of gateways, each handling, say, 
80bits worth of hosts or whichever you prefer, then route the gateways through 
each other.  This also makes it easier for protocols such as SMB and NMB to 
function correctly, if they ever function ever again.  Also, this allows you to 
create scopes for any incurred broadcasts you wish to send out:

       you -.
          __|__
       your gateway-[ gateway A ]
       |          |
gateway B        gateway C
|                 |
:                 :  <-etc...

where A is 3ffe:0:0:1:1::, B is 3ffe:0:0:1:2::, and C is 3ffe:0:0:1:3::, you 
can easily make your broadcasts specific on one, many, specific, or all routers 
(and from each, hosts) without getting carpal tunnel syndrome.

don't forget anycast :)

--dan


Thu, 20 Feb 2003 16:42:56 +0100, "BEGIN, Thomas" <[EMAIL PROTECTED]> 
��������������:

> Hello to all,
> I am wondering on IPv6 impacts over a company network's architecture.
> I mean, a big IPv4 network has to be divided in several VLANs in order to 
> lighten the available bandwidth (sometimes for security reasons but it is not 
> my interest in this case). And this because broadcast messages are received 
> and examined by all network adapter. 
> Thus comes my question: As there is no more broadcast messages but only 
> multicast messages in IPv6, is there still a need to divide a big network in 
> smaller networks (VLANs) ?
> 
> Thanks
> 
> Thomas BEGIN
> 
> 
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