Jun 03 13:19:30 pikprod-1-master-3 systemd-networkd[583]: lxc96d368b6925b: Link DOWN
Jun 03 13:19:30 pikprod-1-master-3 systemd-networkd[583]: lxc96d368b6925b: Lost carrier
Jun 03 13:19:30 pikprod-1-master-3 networkd-dispatcher[1907373]: Interface "lxc96d368b6925b" not found.
Jun 03 13:19:30 pikprod-1-master-3 systemd[1]: networkd-dispatcher.service: Got notification message from PID 1907373, but reception only permitted for main PID 656
Jun 03 13:19:30 pikprod-1-master-3 networkd-dispatcher[656]: ERROR:Failed to get interface "lxc96d368b6925b" status: Command '['/usr/bin/networkctl', 'status', '--no-pager', '--no-legend', '--', 'lxc96d368b6925b'>
Jun 03 13:19:30 pikprod-1-master-3 chronyd[646]: Source 185.125.24.59 offline
Jun 03 13:19:30 pikprod-1-master-3 chronyd[646]: Source 84.16.67.12 offline
Jun 03 13:19:40 pikprod-1-master-3 systemd-udevd[1907585]: tmp68b67: Failed to get link config: No such device
Jun 03 13:19:40 pikprod-1-master-3 systemd-networkd[583]: tmp68b67: Could not find device, waiting for device initialization: No such device
Jun 03 13:19:40 pikprod-1-master-3 systemd-udevd[1907588]: ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.
Jun 03 13:19:40 pikprod-1-master-3 systemd-udevd[1907588]: Using default interface naming scheme 'v245'.
Jun 03 13:19:40 pikprod-1-master-3 systemd-networkd[583]: lxcc68a5de65645: Link UP
Jun 03 13:19:40 pikprod-1-master-3 networkd-dispatcher[656]: WARNING:Unknown index 34 seen, reloading interface list
Jun 03 13:19:41 pikprod-1-master-3 kernel: eth0: renamed from tmp68b67
Jun 03 13:19:41 pikprod-1-master-3 networkd-dispatcher[656]: ERROR:Unknown interface index 34 seen even after reload
Jun 03 13:19:41 pikprod-1-master-3 systemd-networkd[583]: lxcc68a5de65645: Gained carrier
Jun 03 13:19:41 pikprod-1-master-3 kernel: IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Jun 03 13:19:41 pikprod-1-master-3 kernel: IPv6: ADDRCONF(NETDEV_CHANGE): lxcc68a5de65645: link becomes ready
Jun 03 13:19:41 pikprod-1-master-3 networkd-dispatcher[656]: WARNING:Unknown index 34 seen, reloading interface list
Jun 03 13:19:41 pikprod-1-master-3 networkd-dispatcher[656]: ERROR:Unknown interface index 34 seen even after reload
Jun 03 13:19:41 pikprod-1-master-3 kernel: lxcc68a5de65645: Caught tx_queue_len zero misconfig


[Thu Jun  3 13:19:40 2021] eth0: renamed from tmp68b67
[Thu Jun  3 13:19:40 2021] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[Thu Jun  3 13:19:40 2021] IPv6: ADDRCONF(NETDEV_CHANGE): lxcc68a5de65645: link becomes ready
[Thu Jun  3 13:19:40 2021] lxcc68a5de65645: Caught tx_queue_len zero misconfig


================ ANOTHER MACHINE ================

root@pikprod-1-master-3:~# networkctl status ens3
● 2: ens3
             Link File: /usr/lib/systemd/network/99-default.link
          Network File: /run/systemd/network/10-netplan-ens3.network
                  Type: ether
                 State: routable (failed)
                  Path: pci-0000:00:03.0
                Driver: virtio_net
                Vendor: Red Hat, Inc.
                 Model: Virtio network device
            HW Address: fa:16:aa:aa:aa:aa
                   MTU: 1500 (min: 68, max: 1500)
  Queue Length (Tx/Rx): 1/1
      Auto negotiation: no
                 Speed: n/a
               Address: 2001:1600:4:25:f816:3eff:aaaa:aaaa
                        fe80::f816:3eff:aaaa:aaaa
                   DNS: 2001:1600:cafe:2000:53::1
                        2001:1600:cafe:2000:53::2
        Search Domains: infomaniak.ch
          Connected To: psk1-compute-8.infomaniak.ch on port fe:16:aa:aa:aa:aa (tapb0aaaaaa-0d)

Jun 02 13:17:09 pikprod-1-master-3 systemd-udevd[439]: ens3: Config file /run/systemd/network/10-netplan-ens3.link matches device based on renamed interface name, ignoring
Jun 02 13:17:10 pikprod-1-master-3 systemd-networkd[583]: ens3: IPv6 successfully enabled
Jun 02 13:17:10 pikprod-1-master-3 systemd-networkd[583]: ens3: Link UP
Jun 02 13:17:10 pikprod-1-master-3 systemd-networkd[583]: ens3: Gained carrier
Jun 02 13:17:11 pikprod-1-master-3 systemd-networkd[583]: ens3: Gained IPv6LL
Jun 02 13:17:11 pikprod-1-master-3 systemd-networkd[583]: ens3: DHCPv4 address 10.4.86.194/24 via 10.4.86.1
Jun 02 13:53:13 pikprod-1-master-3 systemd-networkd[583]: ens3: Could not set NDisc route or address: Connection timed out
Jun 02 13:53:13 pikprod-1-master-3 systemd-networkd[583]: ens3: Failed