Sorry I could have stated the DHCP-PD issue more clearly. Comcast doesn’t support it. [1] > I honestly don't understand the difference with IPv4. You can have

Sorry I could have stated the DHCP-PD issue more clearly. Comcast doesn’t support it. [1] > I honestly don't understand the difference with IPv4. You can have multiple addresses and do load balancing on the router with both. A PC cannot easily have 2 different IPv4 subnets in the same NIC, which is what IPv6 permits with RA. Even if a PC did have 2 networks, how does the router tell the PC to use fibre for everything except backups, and cable for backups, and cellular only if the others fail? These decisions are best made by the router, not an arbitrary client device connected behind it. With IPv6 and no NAT, how does the client PC know what IP to use as its source at any given time? Yes NAT66 works- and for a very very long time the IPv6 community has resisted any NAT, which has resulted in poor NAT support in IPv6 stacks across many vendors. > Wrong! Everyone needs routable addresses, even if they don't know it because they need VoIP, video calls on webRTC, FTP, p2p file sharing, online games, etc. All of these barely manage to work in a NAT by using workarounds like ALGs, UpnP, NAT-PMP, relay servers and other atrocities that greatly complicate the network design and are a security nightmare. I didn’t say a routable IP isn’t required. I said a dedicated unique public IP is not required. A gas station or fast food business doesn’t need online games or p2p file sharing. Their VoIP is done over VPN or uses NAT ALG in the firewall. Their web browser and payment systems are happy with a NAT’d IP on a LAN behind their router (which may or may not have a public static IPv4). 1. https://forums.businesshelp.comcast.com/conversations/ipv6/ipv6-delegations-dhcppd/5fe0a64ac5375f08cd9a2ba7 https://forums.businesshelp.comcast.com/conversations/ipv6/i...