Unfortunately the logs are not that helpful, since VLAN additions are not printed in the dmesg/syslog/journal. I.e. one needs to bump udev logging to be more verbose.
Locally I can activate multiple NICs and like same vlan on both of them: $ ip link | grep '^[0-9]' 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 2: encc000: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 3: encc000.2653@encc000: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 4: encc003: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 5: encc003.2653@encc003: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 On bionic. However, my NICs are 'Device is a OSD Express card (level: 0774)' To get this further, we'd need to crank the logging up to see when, if any vlans, are created / added. However, it seems to me that I get no information from the kernel when vlan interfaces are added! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to iproute2 in Ubuntu. Matching subscriptions: iproute2 https://bugs.launchpad.net/bugs/1838258 Title: Unable to configure VLAN on an additional OSA interface Status in Ubuntu on IBM z Systems: Triaged Status in iproute2 package in Ubuntu: New Status in linux package in Ubuntu: New Bug description: After installing a base Ubuntu 18.04.1 server, an additional OSA device "e530" is attached and configured with chzdev. Then a VLAN configuration should be applied using the ip command. However this results in the error message "RTNETLINK answers: File exists". >----snip---- ip link add link ence530 name ence530.209 type vlan id 209 RTNETLINK answers: File exists ----snip----< Executing the same steps on an Ubuntu 16.04.5 server, the ip command finishes without an error message but the VLAN interface is also not configured. Reproduction: - Install a 18.04.1 server - attach an additional OSA interface - configure a VLAN using the ip command To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1838258/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
