It was my fault I am sorry, forgot the the connection should use PPPoe. This is why it was unable to get an IP.

Ok, going along, when I try

opkg update, get these errors:

Downloading 404 Page not found - GL.iNet.
Signature check passed.
Collected errors:

The same I was able to install 6in4, just wonder if these errors represent something serious and if there is a fix.

Best

Frank