> Gave some time between netplan apply and check without success, I can leave > it for > hours and the IP never gets assigned
Indeed, I cannot see it being assigned an IPv4 address in your latest "_delay" run. (Well, there is some assignment of an IP to enP53p0s0.171 at 15:05:29 in the journal logs, but that was before you started the experiment). > maybe what you are seeing is the manual assignment that I did with > ip addr add 192.168.171.53/24 dev enP53p0s0.171 No I don't think so, as the timestamp of your manual "ip addr add" command (08:13:02++) is after the systemd-networkd assignment in the logs (08:12:38). Also, your output clearly shows that the IP was already assigned when you tried to (re-)assign it manually (it shows the "RTNETLINK answers: File exists" error): > root@ilabg13:~# ip addr add 192.168.171.53/24 dev enP53p0s0.171 > RTNETLINK answers: File exists I'm a bit worried about the /etc/systemd/network/10-enP53p0s0.link file (now there seems to be another one "10-enP53p0s0.link" as well...) – Is this file needed? Why was it created? It matches on "MACAddress=82:0c:9b:c9:78:f8", which would match enP53p0s0 AND enP53p0s0.171 at the same time (they use the same inherited MAC address), leading to unspecified behavior, as we cannot rename two interfaces to the same "Name=enP53p0s0". Could you try deleting this file in /etc/systemd/network/10-enP53p0s0.link (potentially adopting your netplan YAML config to the name assigned to this interface by the kernel/systemd) and check if this makes any difference? # rm /etc/systemd/network/10-enP53p0s0.link If for some reason you cannot delete this file, try adding a "Type=!vlan" line instead: # cat /etc/systemd/network/10-enP53p0s0.link [Match] MACAddress=82:0c:9b:c9:78:f8 Type=!vlan [Link] Name=enP53p0s0 Does this make any difference when running "netplan apply && sleep 30 && networkctl status -a --no-pager"? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1929657 Title: [Ubuntu 20.4.2] vLan not getting static IP assigned (on s390x) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1929657/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs