i have the same problem over here, i posted more details over here: https://github.com/mailcow/mailcow-dockerized/issues/2918
i believe to reproduce the problem you can: - set up multiple subnets under the same interface name - make sure systemd-networkd is the only system to handle public interface (no NetworkManager or netplan) - install somesoftware which uses networkd-dispatcher (like mailcow on docker) - wait a week to see 1 minute downtime upon hitting the concurrency described above OR - my interfaces also restart (causing disconnets) upon systemd updates (via apt upgrade), or systemd re-install (with chances of 4 to 5 of hitting disconnect) pls understand that to hit the concurrency problem you probably need to have lot's of IPs or subnets in your network configuration file in /etc/systemd/network/enpXXX.network (i got 7 ipv4 addresses there) best regards, stan ** Bug watch added: github.com/mailcow/mailcow-dockerized/issues #2918 https://github.com/mailcow/mailcow-dockerized/issues/2918 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1775131 Title: Ubuntu 18.04 networking issue (connection drops after approx. 15 minutes) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1775131/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
