This has nothing to do with network, as mentioned earlier netplan is masked and ifupdown works as expected. Moreover it is known EXACTLY what happens (in initramfs):
local_top/aoe calls configure_networking In absence of any kernel args, configure_networking tries to bring up every interface, by launching dhcpc for 3(?) seconds. This succeeds for interface that will be configured as part of bridge by ifupdown later, so bridge is left unconfigured and network is lost. The current workaround is to add ip=none to kernel line The proper fix is to change configure_networking to have a mode/arg where it brings up network interfaces bot does not try to assign ip addresses, and call it this way from local_top/aoe . Probably even split configure_networking into two functions... p.s. I can predict the future though (I have such a gift) - the resolution would be "AOE is used by 0.000000000000000001% of ubuntu users, we power the word and store petabytes of data, mark this as enhancement for a future version N+5". -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ifupdown in Ubuntu. https://bugs.launchpad.net/bugs/1905472 Title: Something starts dhcclient for every intrface on boot Status in ifupdown package in Ubuntu: Incomplete Status in initramfs-tools package in Ubuntu: Incomplete Status in netplan.io package in Ubuntu: Incomplete Bug description: After upgrade frpm 18LTS to 20LTS I've lost the network. Network is managed by ifupdown Netplan is not installed Network manger is disabled (masked) Yet, at boot, SOMETHING starts dhclient for every network interface. This has disastrous results - dhcp request succeeds on physical interface that is a base for a vlan-based interface, causing real dhcp request on to fail on vlan interface. Expected behavior - dhclient starts only for interfaces marked as dhcp in /etc/network/interfaces . ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: isc-dhcp-client 4.4.1-2.1ubuntu5 ProcVersionSignature: Ubuntu 5.8.0-29.31~20.04.1-generic 5.8.14 Uname: Linux 5.8.0-29-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.12 Architecture: amd64 CasperMD5CheckResult: skip Date: Wed Nov 25 00:07:45 2020 SourcePackage: isc-dhcp UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1905472/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
