Comment 1 for bug 1642906

Test scenarios #1,#2,#3 are to be expected. You did not set ipv6_ra_mode, and based on your configuration you will need to.

Same with #4,#5,#6 -

Please consult the networking guide about the details why -

Overall, please just test subnets with ipv6_address_mode and ipv6_ra_mode set - you will be saving yourself quite a bit of time.