I recently moved in with a friend who shares his internet connection with me. Basically, I have my own router (a small OPNsense box) directly behind his router (a TP-Link Omada gateway):

ISP→Omada→OPNsense

IPv4 is IPv4 and as good as CG-NAT and dynamic addresses will allow. But I also want to use IPv6.

Fortunately, our provider supports prefix delegation (as they should) just the IPv6 addresses are still dynamic. So, I thought it would be easy. I would just have the Omada gateway fetch a prefix for further distribution downstream, and my router would ask his routers DHCPv6 for a piece of that pie. And everything would be jolly.

TLDR: His Omada gateways DHCPv6 does not support prefix delegation. Also static IPv6 routes appear to be unsupported. And, apparently IPv6 ACLs don’t work either…?

My question now is: TP-Link sells these devices as “professional” “business” solutions. I feel like I’m missing something. Is there really no proper support for IPv6 on these devices? And if so… what would a good solution look like? I really, really don’t want NAT on IPv6.

Edit: It’s a TP-Link Omada ER605