IPv6 Dual Stack with DHCP-PD

[trendy]

This looks weird, it should be working without any modifications. Take a backup of the device, then reset to defaults. Configure the wan interface for pppoe with minimum to achieve connectivity and check that it has at least a link local address.

[kix]

Thanks.

I contacted with my ISP and there was a problem in the configuration. Now is solved

root@OpenWrt:~# ping -6 ipv6.google.com
PING ipv6.google.com (2a00:1450:4003:801::200e): 56 data bytes
64 bytes from 2a00:1450:4003:801::200e: seq=0 ttl=117 time=3.913 ms
64 bytes from 2a00:1450:4003:801::200e: seq=1 ttl=117 time=3.278 ms
^C
--- ipv6.google.com ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 3.278/3.595/3.913 ms
root@OpenWrt:~#

Thanks a lot for your help!
Best Regards,
kix