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The largest use of IPv6 is in mobile (cell) networks. When they effectively killed IP block mobility (provider independent netblocks), they (the standards bodie

The largest use of IPv6 is in mobile (cell) networks. When they effectively killed IP block mobility (provider independent netblocks), they (the standards bodies) effectively killed it's adoption everywhere else. I work in the networking space and outside of dealing with certain European subsidiaries, we don't use IPv6 anywhere. It's a pain to use and the IPv6 stacks on equipment (routers, firewalls, etc) are no where near the quality, affordability, and reliability of their IPv4 stacks.

Sesse__ 2y ago
What do you mean? IPv6 PI is common and easy to get; there's no big difference between IPv4 and IPv6 there.
- FuriouslyAdrift 2y ago
  I've gone through dozens of applications for a PI block and all been turned down. Heard the same from most of the networking people I know of. One even had their company become a LIR just so they could lock down a block. Outside of Europe I don't know anyone not FAANG sized that managed to get it done in the last few years. In my dealings with small to medium sized biz, I usually go the SDWAN route to aggregate and balance in IPv4 space instead as it is MUCH easier to get it done from an ISP.
  - Sesse__ 2y ago
    Huh, I have one for my personal home network :-) Granted, that is in RIPE. As long as you're multihomed, how can they turn it down?
    - FuriouslyAdrift 2y ago
      Multihoming is broken for most people in IPv6 space. It's stupid easy in IPv4. https://blog.ipspace.net/2010/12/small-site-multihoming-in-ipv6-mission/ https://blog.ipspace.net/2010/12/small-site-multihoming-in-i...
      - Sesse__ 2y ago
        You lost me at “multiple per-interface NAT rules […] with some load balancing trick” being “stupid easy”… But BGP+PI is indeed how multihoming is supposed to work, both in IPv4 and IPv6. (Well, in IPv6, you can put two prefixes on-link and do poor man's multihoming that way, which you cannot reliably in IPv4.) Of course, if you define “it cannot be BGP+PI”, then indeed it's probably harder, but if you exclude the intended solution, obviously there's no intended solution.
kiwijamo 2y ago
Depends on the country. New Zealand has zero mobile IPv6 users -- not one carrier has deployed IPv6 on mobile (and none plan to do so anytime soon). This includes two carriers that have deployed IPv6 on their xDSL/Fibre networks so it's not like they don't know how. It's interesting that some countries (e.g. NZ) see IPv6 deployed mostly on fixed line (i.e. xDSL/Fibre) while others (e.g. US) are mostly mobile. Perhaps it's not the fixed/mobile layer of the network stack that influences the decision to go IPv6 or not.

Sesse__ 2y ago

What do you mean? IPv6 PI is common and easy to get; there's no big difference between IPv4 and IPv6 there.

FuriouslyAdrift 2y ago
I've gone through dozens of applications for a PI block and all been turned down. Heard the same from most of the networking people I know of. One even had their company become a LIR just so they could lock down a block. Outside of Europe I don't know anyone not FAANG sized that managed to get it done in the last few years. In my dealings with small to medium sized biz, I usually go the SDWAN route to aggregate and balance in IPv4 space instead as it is MUCH easier to get it done from an ISP.
- Sesse__ 2y ago
  Huh, I have one for my personal home network :-) Granted, that is in RIPE. As long as you're multihomed, how can they turn it down?
  - FuriouslyAdrift 2y ago
    Multihoming is broken for most people in IPv6 space. It's stupid easy in IPv4. https://blog.ipspace.net/2010/12/small-site-multihoming-in-ipv6-mission/ https://blog.ipspace.net/2010/12/small-site-multihoming-in-i...
    - Sesse__ 2y ago
      You lost me at “multiple per-interface NAT rules […] with some load balancing trick” being “stupid easy”… But BGP+PI is indeed how multihoming is supposed to work, both in IPv4 and IPv6. (Well, in IPv6, you can put two prefixes on-link and do poor man's multihoming that way, which you cannot reliably in IPv4.) Of course, if you define “it cannot be BGP+PI”, then indeed it's probably harder, but if you exclude the intended solution, obviously there's no intended solution.

kiwijamo 2y ago

Depends on the country. New Zealand has zero mobile IPv6 users -- not one carrier has deployed IPv6 on mobile (and none plan to do so anytime soon). This includes two carriers that have deployed IPv6 on their xDSL/Fibre networks so it's not like they don't know how. It's interesting that some countries (e.g. NZ) see IPv6 deployed mostly on fixed line (i.e. xDSL/Fibre) while others (e.g. US) are mostly mobile. Perhaps it's not the fixed/mobile layer of the network stack that influences the decision to go IPv6 or not.