Hello, i try to use (Centos8) NetworkManager builtin Prefix-Delegation for ipv6. Unfortunately i found no howto is helping me. i do: /etc/NetworkManager/NetworkManager.conf: [main] dhcp=dhclient Modify Cons: nmcli con modify LOKAL1 ipv6.method shared nmcli con modify LOKAL2 ipv6.method shared nmcli con modify WAN_TK ipv6.method dhcp Before these modifications i got over pppoe the public ipv6. Now only ipv4. These steps are right/necassary. I see in logs these message: NetworkManager[5204]: <warn> [1592929660.5084] device (enp6s0.7.wan): failure to start DHCPv6: missing MAC address What is todo? Thanks a lot. Joe