Here are the files of the networkmanager systemd-networkd conflict (I already removed ifupdown, the problem is the same, so we say for sure networkmanager or systemd-networkd causes the problem)
the output of ip a is the following:
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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:1d:7d:c3:a3:a1 brd ff:ff:ff:ff:ff:ff
inet6 fd12:2017:8387:0:8d6:b5ff:bf63:6389/64 scope global mngtmpaddr noprefixroute dynamic
valid_lft 86396sec preferred_lft 14396sec
inet6 fd12:2017:8387:0:21d:7dff:fec3:a3a1/64 scope global mngtmpaddr noprefixroute dynamic
valid_lft 86304sec preferred_lft 14304sec
inet6 fe80::21d:7dff:fec3:a3a1/64 scope link
valid_lft forever preferred_lft forever
the profile that should come up has addr-gen-mode=stable-privacy, so somehow it adds another ipv6 address, but it totally ignores ipv4...
Here are the files of the networkmanager systemd-networkd conflict (I already removed ifupdown, the problem is the same, so we say for sure networkmanager or systemd-networkd causes the problem)
the output of ip a is the following:
1: lo: <LOOPBACK, UP,LOWER_ UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 8387:0: 8d6:b5ff: bf63:6389/ 64 scope global mngtmpaddr noprefixroute dynamic 8387:0: 21d:7dff: fec3:a3a1/ 64 scope global mngtmpaddr noprefixroute dynamic 7dff:fec3: a3a1/64 scope link
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: eth1: <BROADCAST,
link/ether 00:1d:7d:c3:a3:a1 brd ff:ff:ff:ff:ff:ff
inet6 fd12:2017:
valid_lft 86396sec preferred_lft 14396sec
inet6 fd12:2017:
valid_lft 86304sec preferred_lft 14304sec
inet6 fe80::21d:
valid_lft forever preferred_lft forever
the profile that should come up has addr-gen- mode=stable- privacy, so somehow it adds another ipv6 address, but it totally ignores ipv4...