[tlug] IPoE and IPv6

[Tod McQuillin <devin@sevenlayer.studio>]

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