The system I pulled the networkd log from had not yet become unreachable but here's a snippet from one that did:
May 27 07:38:18 ip-10-0-4-228 systemd[1]: systemd-networkd.service: Failed with result 'core-dump'. May 27 07:38:18 ip-10-0-4-228 systemd[1]: Failed to start Network Service. May 27 07:38:18 ip-10-0-4-228 systemd[1]: Dependency failed for Wait for Network to be Configured. May 27 07:38:18 ip-10-0-4-228 systemd[1]: systemd-networkd-wait-online.service: Job systemd-networkd-wait-online.service/start failed with result 'dependency' May 27 07:38:18 ip-10-0-4-228 systemd[1]: systemd-networkd.socket: Failed with result 'service-start-limit-hit'. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1881972 Title: systemd-networkd crashes with invalid pointer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1881972/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs