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Re: IPv6 broadband provisioning
On Sat, 29 Dec 2007 23:17:42 +0100
Iljitsch van Beijnum <iljitsch@muada.com> wrote:
> On 29 dec 2007, at 1:46, David Miles wrote:
>
> > It is the N:1 VLAN model that needs an method to insert some "access
> > node specific" information into the DHCPv6 exchange.
>
<snip>
> The issue that I see is that of duplicate MAC addresses. I don't see
> an easy way to protect against that. How does this work today in a N:1
> model?
>
The DSLAMs we use perform MAC address - wait for it - NAT, into
algorithmically calculated MAC addresses, in part based on line card
and node IDs. It's ugly thinking about all the FCSes that are being
recalculated all the time, however it does avoid MAC address
collisions, regardless of what the customer does on their side of the
DSLAM.
Regards,
Mark.