On Wed, May 8, 2013 at 7:51 PM, Steven Barth <cyrus@openwrt.org> wrote:

if there would be multiple routers which I guess is unlikely in that situation. One could maybe attribute the prefix to the source address of the DHCPv6 server but that sounds problematic to me aswell.

So you're talking about the case where you have ISP1 and ISP2 "plugged into a switch together with your router"?

In that case I can't see any better way than attempting to match the link-local IPv6 address that you got the RA from to the link-local address of the DHCPv6 server you got the PD from.

I can't think of a situation why these would be different, but perhaps there is. Can the DHCPv6 server be a global address?