poulpe

Thanks Igor, that's was the needed action, after ignoring ipv6 on both my eth cards, still ipv6, and after reboot, it's OK:
No more ipv6.
 
(Same result if you remove/purge network-manager)
(and it's the same on the ubuntu version, working OK no more ipv6 after the sysctl file + hosts + network-manager purge.
 
Thanks !