On 2022-08-13, David Wright <deb...@lionunicorn.co.uk> wrote: > On Wed 10 Aug 2022 at 08:12:11 (-0000), Curt wrote: >> I never realized that local addresses were fundamentally identical in all >> local networks because there weren't enough addresses in the first place, > > Don't you need them to be identical because otherwise everybody > would have to configure their border equipment (like routers) > to recognise /their/ choice as local.
I guess they've got it all figured out. > It's not clear, either, how you would select your own local > range without accidentally choosing addresses that are in use > somewhere on the globe, unless the choice was a fixed, well- > known set of possible values (as it is: 10, 172.16–31, 192.168). The IETF RFC 7084 (formerly RFC 6204), Basic Requirements for IPv6 Customer Edge Routers, provides a list of features that are desirable in a residential CPE device. The University of New Hampshire InterOperability Laboratory (UNH-IOL) provides IPv6 Customer Edge (CE) interoperability testing. The products that they test and certify are good examples of products that would be ideal for building a dual-protocol home lab. The Consumer Electronics Association (CEA) IPv6 Transition Working Group (formed in 2011) has also concentrated their efforts on ensuring that consumer-electronics manufacturers are creating dual-protocol devices for home use. Their CEA-2048, Host and Router Profiles for IPv6, effort provides guidance for home router vendors. ... Getting Your IPv6 Addresses Now that you have your network equipment upgraded and you are assured that your upstream connectivity support IPv6, you can connect it all together, power it on, and discovery if you have obtained a global IPv6 address. Your home router will receive an ICMPv6 Router Advertisement (RA) message from the upstream ISP network indicating that your CPE should proceed to use DHCPv6 to obtain its single external IPv6 address. The ISP likely operates a high-availability DHCPv6 service that receives the DHCPv6 Solicit messages from subscribers CPE and then determines the IPv6 addresses to allocate. After that step is complete, your CPE will also send a subsequent DHCPv6 Prefix Delegation (PD) (RFC 3633) request to obtain an IPv6 prefix (typically a /64) to be used for the internal home LAN. It is important to remember that this IPv6 address block is Provider Assigned (PA) and not Provider Independent (PI) and thus, non-portable between ISPs. If you switch ISPs, then you will need to renumber any statically-assigned systems. However, the new ISP will provide you a new IPv6 prefix from their block and the dynamically-assigned systems in your house should transition smoothly to the new address space. https://blogs.infoblox.com/ipv6-coe/home-networking-with-ipv6/ > Cheers, > David. > > --
