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.

  • What are the router models and configurations? – Ron Maupin Feb 21 at 18:35
  • I added the Router model for Router_1. Not sure what I should share regarding your request for "configuration". – Kai Neumann Feb 21 at 18:37
  • Unfortunately, questions about home networking and consumer-grade devices are explicitly off-topic here. You could try to ask this question on Super User. – Ron Maupin Feb 21 at 18:38
  • But I am asking if the official standard (IPv6, DHCPv6, Neighbor-Discovery) supports that - not how to configure my equipment! – Kai Neumann Feb 21 at 18:39
  • 1
    It has everything to do with the equipment. If your equipment does not support IPv6 Prefix Delegation or DHCP relay, then you need to upgrade the equipment. I doubt most consumer-grade devices support that or what you want to do. – Ron Maupin Feb 21 at 18:54

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