My ISP provides IPv6 connectivity and everything works fine except for one thing: I can’t enable privacy extensions for IPv6 on one single machine, the one with OS Leap 42.1 (the other with OpenSuse 13.2 is not affected).
As far as I can see, ipv6-privacy is enabled both in Networkmanager and in the kernel:
It seems to only be a problem with NetworkManager. I have configured my systems to use “wicked” and am not having problems. I do reconfigure my laptop for NetworkManager when I travel. But most of the time, I don’t see any IPv6 addresses when traveling.