[ipv6-wg at ripe.net] What is a site?

On 9-mei-2005, at 12:40, Gert Doering wrote:

> As for the /128s: I think that providing a /64 for a dialup router,
> negotiating unique host-IDs with incoming PPP clients and then sending
> RAs for the "shared" /64 down the PPP links will work fine for /128
> (auto-)assignment.  I'm not sure, though, whether that's fully backed
> by all relevant specs.

I don't understand what you mean here... Suppose:

                                                  host1     host2
+---------------+     +--------------------+      |        /
|ISP dial-up box+-ppp-+customer dial-up box+---customer subnet
+---------------+     +--------------------+      |        \
                                                  host4     host3


So the ISP and customer boxes negotiate interface identifiers. So far  
so good. But if the ISP box now starts sending out RAs, how do hosts  
1 - 4 know this? For this to work the customer box must be a bridge  
and not a router, but this negates the whole idea behind the two  
boxes on opposite ends of the PPP link negotiating interface  
identifiers...

What you need is a subnet for the PPP link and _another_ subnet for  
the customer's other stuff. This can be done with DHCPv6 prefix  
delegation, I think, but not with regular RAs.