@David-TP Thanks! I will.

This is IPV6plus, which selected automatically. After ross of connection, I tried several time for re-setup, but cannot back again. I also reported to Biglove whichi internet provider in Japan.

@ImtiazAli set ipv6 connect to plovider for internet. was working before update But updated firmware to 1.6.0 cannot connect it!

firmware update to 1.6.0 Loss of connection from Biglove internet.