The culprit is intramfs. Starting with 20 LTS, having an AOE device brings in local_top/aoe, which calls configure_networking . This causes dhcp configuration of the primary net interface, which screws up all network later (as this physical interface is part of the bridge, and bridge can't get a dhcp lease later).
AOE stands for "ATA over ETHERNET", not ATA over IP. There is zero need to bring up ip stack for aoe to function. ** Also affects: ubuntu-core-initramfs Importance: Undecided Status: New ** No longer affects: isc-dhcp (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1905472 Title: Something starts dhcclient for every intrface on boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-core-initramfs/+bug/1905472/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs