Re: [tlug] IPoE and IPv6

[Andrew Todd <at+tlug@??>]

Hi Tod,

I looked into this a bit last year in the context of using OpenWRT and found this information that might be helpful. In my current living situation, however, I couldn't really test it out. Evidently Hikari 10Gbps might also be an option for IPoE.

https://hcrudolph.com/posts/2025-03-openwrt/

https://github.com/fakemanhk/openwrt-jp-ipoe

https://ipv4.web.fc2.com/map-e.html

I will also be curious to hear more as I am moving to a location where I can probably choose my own ISP.

Best,

Andrew

On 4/23/26 8:28 AM, Tod McQuillin wrote:

> Greetings
>       TLUG,
>       
>       
>       I have been researching ISP options in Japan, and it seems there
>       are basically two provisioning methods when using NTT フレッツ光ネクスト:
>       
>       
>       * PPPoE
>       
>       * IPoE
>       
>       
>       While some ISPs do offer IPv6 over PPPoE, it's clearly a legacy
>       technology on its way out, and IPoE looks like the future with its
>       native IPv6.
>       
>       
>       However, as I look more into it, I'm starting to realize that
>       getting more than a single /64 of IPv6 address space via IPoE is
>       ... let's just say needlessly complicated.
>       
>       
>       I've learned from my research that unless you have ひかり電話, NTT's
>       network will not even offer DHCPv6 prefix delegation, making it
>       impossible to get more than a /64 of space since you can't request
>       it.
>       
>       
>       If you *do* have ひかり電話 then you are most likely using a NTT
>       provided HGW (ONU + router) and the HGW, although it can request
>       and receive a /56, *still* only advertises a /64 to the locally
>       connected network.
>       
>       
>       Does this situation sound familiar to you guys?
>       
>       
>       Has anyone got a way to reliably get a /56 via IPoE?
>       
>       
>       I'm starting to think that the only way to reliably get a /56 is
>       to use PPPoE which kind of sounds crazy ... but then again,
>       welcome to Japan.
>       
>       
>       Thanks for any good info you can provide.
>       
>       
>       Tod
>