Hello, I am just wondering why ipv6 gets configured for enp1s0, even though I do not request that in /etc/network/interfaces (?).
I suspect NetworkManager takes care of that, but I always thought, network manager does not touch interfaces mentioned in /etc/network/interface? System is stretch. [ 17.057438] r8169 0000:01:00.0 enp1s0: link down [ 17.057440] r8169 0000:01:00.0 enp1s0: link down [ 17.057546] IPv6: ADDRCONF(NETDEV_UP): enp1s0: link is not ready [ 28.782440] r8169 0000:01:00.0 enp1s0: link up [ 28.782473] IPv6: ADDRCONF(NETDEV_CHANGE): enp1s0: link becomes ready root@gigabyte:~# cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback auto enp1s0 allow-hotplug enp1s0 iface enp1s0 inet dhcp #iface eno1.7 inet6 auto root@gigabyte:~# ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 74:d4:35:7b:0d:d8 brd ff:ff:ff:ff:ff:ff inet 192.168.7.201/24 brd 192.168.7.255 scope global enp1s0 valid_lft forever preferred_lft forever inet6 2a02:8070:898f:e4fc:76d4:35ff:fe7b:dd8/64 scope global mngtmpaddr dynamic valid_lft 14307sec preferred_lft 14307sec inet6 fe80::76d4:35ff:fe7b:dd8/64 scope link valid_lft forever preferred_lft forever root@gigabyte:~# Many thanks Rainer -- Rainer Dorsch http://bokomoko.de/