Comment 43 for bug 2036358

systemd 249.11-0ubuntu3.11 does *not* solve the issue for me. I seem to be running into the same situation as Werner in #32 where `optional: true` from the netplan config is not being respected.

systemd-networkd-wait-online seems to ignore `RequiredForOnline=no` in the .network config.

Netplan config:

ubuntu@ubuntu:~$ sudo netplan get
network:
  version: 2
  ethernets:
    eth0:
      optional: true
      dhcp4: true
      dhcp6: true
    pfe:
      match:
        name: "pfe*"
      optional: true
      dhcp4: true
      dhcp6: true

systemd-networkd configs:

ubuntu@ubuntu:~$ grep '' /run/systemd/network/10-netplan-*
/run/systemd/network/10-netplan-eth0.network:[Match]
/run/systemd/network/10-netplan-eth0.network:Name=eth0
/run/systemd/network/10-netplan-eth0.network:
/run/systemd/network/10-netplan-eth0.network:[Link]
/run/systemd/network/10-netplan-eth0.network:RequiredForOnline=no
/run/systemd/network/10-netplan-eth0.network:
/run/systemd/network/10-netplan-eth0.network:[Network]
/run/systemd/network/10-netplan-eth0.network:DHCP=yes
/run/systemd/network/10-netplan-eth0.network:LinkLocalAddressing=ipv6
/run/systemd/network/10-netplan-eth0.network:
/run/systemd/network/10-netplan-eth0.network:[DHCP]
/run/systemd/network/10-netplan-eth0.network:RouteMetric=100
/run/systemd/network/10-netplan-eth0.network:UseMTU=true
/run/systemd/network/10-netplan-pfe.network:[Match]
/run/systemd/network/10-netplan-pfe.network:Name=pfe*
/run/systemd/network/10-netplan-pfe.network:
/run/systemd/network/10-netplan-pfe.network:[Link]
/run/systemd/network/10-netplan-pfe.network:RequiredForOnline=no
/run/systemd/network/10-netplan-pfe.network:
/run/systemd/network/10-netplan-pfe.network:[Network]
/run/systemd/network/10-netplan-pfe.network:DHCP=yes
/run/systemd/network/10-netplan-pfe.network:LinkLocalAddressing=ipv6
/run/systemd/network/10-netplan-pfe.network:
/run/systemd/network/10-netplan-pfe.network:[DHCP]
/run/systemd/network/10-netplan-pfe.network:RouteMetric=100
/run/systemd/network/10-netplan-pfe.network:UseMTU=true

eth0 is configured:
ubuntu@ubuntu:~$ networkctl list
IDX LINK TYPE OPERATIONAL SETUP
  1 lo loopback carrier unmanaged
  2 eth0 ether routable configured
  3 can0 can off unmanaged
  4 can1 can off unmanaged
  5 llcecan0 can off unmanaged
  6 llcecan1 can off unmanaged
  7 llcecan2 can off unmanaged
  8 llcecan3 can off unmanaged
  9 llcecan4 can off unmanaged
 10 llcecan5 can off unmanaged
 11 llcecan6 can off unmanaged
 12 llcecan7 can off unmanaged
 13 llcecan8 can off unmanaged
 14 llcecan9 can off unmanaged
 15 llcecan10 can off unmanaged
 16 llcecan11 can off unmanaged
 17 llcecan13 can off unmanaged
 18 llcecan14 can off unmanaged
 19 llcecan15 can off unmanaged
 20 pfe0 ether degraded configuring
 21 pfe1 ether no-carrier configuring
 22 pfe2 ether no-carrier configuring

22 links listed.

systemd-networkd-wait-online times out:

ubuntu@ubuntu:~$ sudo SYSTEMD_LOG_LEVEL=debug /lib/systemd/systemd-networkd-wait-online --timeout=10
Found link 22
Found link 21
Found link 20
Found link 19
Found link 18
Found link 17
Found link 16
Found link 15
Found link 14
Found link 13
Found link 12
Found link 11
Found link 10
Found link 9
Found link 8
Found link 7
Found link 6
Found link 5
Found link 4
Found link 3
Found link 2
Found link 1
llcecan2: link is not managed by networkd (yet?).
llcecan0: link is not managed by networkd (yet?).
llcecan7: link is not managed by networkd (yet?).
llcecan9: link is not managed by networkd (yet?).
llcecan4: link is not managed by networkd (yet?).
llcecan10: link is not managed by networkd (yet?).
pfe1: link is ignored
can0: link is not managed by networkd (yet?).
pfe0: link is ignored
llcecan3: link is not managed by networkd (yet?).
eth0: link is ignored
llcecan11: link is not managed by networkd (yet?).
llcecan6: link is not managed by networkd (yet?).
lo: link is ignored
llcecan13: link is not managed by networkd (yet?).
llcecan1: link is not managed by networkd (yet?).
can1: link is not managed by networkd (yet?).
pfe2: link is ignored
llcecan14: link is not managed by networkd (yet?).
llcecan8: link is not managed by networkd (yet?).
llcecan15: link is not managed by networkd (yet?).
llcecan5: link is not managed by networkd (yet?).
Timeout occurred while waiting for network connectivity.