I have asked this question on Super-User, though I'm not sure, it's the best place. 1
I believe this Exchange is a more appropriate place to ask:
I have a dual router setup (two routers behind each other) and I want to get IPv6 working on my Local Network.
ISP <-> Router_1 <-> Router_2 (Unifi USG) <-> Local Network
- Router_1 gets a global IPv6 address and also gets a Prefix-Delegation from the ISP.
- Clients directly connected to Router_1 also successfully get global IPv6 addresses.
What I now want to achieve is that the Router-Advertisement from Router_1 is "forwarded" across the Router_2 into my Local Network. But I'm not sure the standards actually support that. I did find the multi-home scenarion in the RFC but I couldn't figure out if what I have in mind would actually work.
Why I want that scenario to work anyay? Because my Router_1 (Vodafone Station; it's a kind of crappy home-router from my ISP) does not support the further Prefix-Delegation to another router. Therefore I need to use the DHCPv6-Server that's on the Router_1 for my LAN(s).
Reading through documentation on IPv6, DHCPv6, Router Advertisements and SLAAC, I still can't seem to figure out if this is actually supported or not.