Please can you share the output of "lszdev qeth", too? And is your system connected to a VLAN - means do you have a VLAN device in your system?
Apr 12 06:05:45 s1lp15 kernel: qeth.e804c4: 0.0.c006: Priority Queueing not supported Apr 12 06:05:45 s1lp15 kernel: qdio: 0.0.c008 OSA on SC bb4 using AI:1 QEBSM:0 PRI:1 TDD:1 SIGA: W AP Apr 12 06:05:45 s1lp15 systemd-udevd[869]: Using default interface naming scheme 'v240'. Apr 12 06:05:45 s1lp15 systemd-udevd[869]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable. Apr 12 06:05:45 s1lp15 systemd-udevd[869]: Could not set Alias=, MACAddress= or MTU= on eth0: Resource temporarily unavailable Apr 12 06:05:45 s1lp15 systemd-udevd[869]: eth0: Could not apply link config, ignoring: Resource temporarily unavailable Apr 12 06:05:45 s1lp15 systemd-udevd[869]: Process 'vlan-network-interface UDEV' failed with exit code 1. Apr 12 06:05:45 s1lp15 kernel: qeth.6adf49: 0.0.c006: The device represents a Bridge Capable Port Apr 12 06:05:45 s1lp15 kernel: qeth.cc0c57: 0.0.c006: MAC address 9e:c3:44:57:ac:28 successfully registered on device eth0 Apr 12 06:05:45 s1lp15 kernel: qeth.26d434: 0.0.c006: Device is a OSD Express card (level: 0774) with link type OSD_10GIG. Apr 12 06:05:45 s1lp15 kernel: qeth.f02020: 0.0.c006: QDIO data connection isolation is deactivated Apr 12 06:05:45 s1lp15 networkd-dispatcher[570]: WARNING:Unknown index 11 seen, reloading interface list Apr 12 06:05:45 s1lp15 dnsmasq[809]: reading /etc/resolv.conf Apr 12 06:05:45 s1lp15 dnsmasq[809]: using nameserver 127.0.0.53#53 Apr 12 06:05:45 s1lp15 sudo[864]: pam_unix(sudo:session): session closed for user root -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822585 Title: OSA/qeth inconsistent interface names To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1822585/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs