D6400 not recognising IPv6 delegation, falling back to 6to4 tunnel

[techbloke]

Hello

Had this router since May (it replaced one from another brand) and it is a good product apart from one little problem.

I have an IPv6 delegation from my ISP and the router is set to auto detect it, however, it keeps defaulting back to a 6to4 tunnel.

The router is connected to an ADSL connection (not ADSL 2) running in Point-to-Point Over ATM mode.

The only way I can get the router to recognise the delegation is to switch it to PPPoE mode, this does reduce the speed a little.

I have applied the 1.0.0.52_1.0.52 firmware, any ideas as to why this won't work?

[zeuss]

Hello,

So you can connect to PPPoEv6 correctly while you setup it to PPPoEv6 mode (not Auto detect mode)