> How does your dhcpd server get its address?

It’s hardcoded. For IPv4 it doesn’t need to be dynamic because NAT allows you to hardcode private address ranges. But that whole concept of networking doesn’t translate (no pun intended) to IPv6

This is the problem I’m running into with deploying IPv6. I don’t know what address ranges to allocate because the dhcp server doesn’t perform any handshakes with the ISP. And I’m a bit reluctant to rearchitect the network topology for IPv6 because everything already works really well without IPv6.

So ideally I’d want a way of sliding in IPv6 without having to break what’s already working.

Every solution I’ve explored thus far hasn’t achieved that. But there’s lots of good information shared here today so I’ll have another read and maybe they’ll offer up an insight I’d previously missed.

I have had success running a hybrid IPv4/6 network by reading this guide for inspiration:

https://blog.infected.systems/posts/2024-12-07-building-an-i...

This allows me to have a mixture of both protocols and even some boxes that have both IPv4 and IPv6 addresses. I still have some issues writing routing rules that does not fail for link-local addresses, but the network has now been fully operational for well over a month.

Oof.

Yeah, because you're gonna have to have a DHCPv6 client running on your router (and because your ISP is almost certainly using DHCPv6-PD the router is where you're pretty much going to have to first learn about your LAN-side DHCPv6 prefixes), it's probably going to be a bit tricky (but probably not impossible) to do what you want.

Best of luck. If you figure out how to do it within the HN comment freeze period (I think it's 14 days?), please do leave a follow-up comment. I'd be very interested in hearing what you come up with.