As far as I can tell, yes that's what you would need to do. Prefix Delegation is part of the DHCPv6 spec, so if it can do DHCPv6 I'd be a bit shocked (and disappointed) if it couldn't do PD.Okay, I am starting to understand better. I was thinking more like the ICX 7150 having a function similar to 'IPv4 helper address' where the ICX 7150 would forward router adverts and other IPv6 info from the edgerouter to it's associated VLANs via a transit link (fd00::/127).But
I see what your saying, so it's like the edgerouter receives the /60 prefix from the ISP, probably has to take one /64 subnet for itself, but then has its own prefix delegation server to delegate the remaining 15 /64s to the ICX 7150, and it would assign those to the VE's accordingly.
I guess now I need to research if the edgerouter can delegate prefixes.
That said, you MIGHT be able to skip PD and do DHCPv6 assignments using DHCPv6 Relay (which is what the helper addresses are for IPv4). I tend to forget that because of my gateway being a pfSense box and pfSense flat out refusing to properly implement DHCP Relay configurations for unattached subnets, but that very much could work. But I believe you'd still need to do DHCPv6 rather than SLAAC if you were going to do it that way.