Looks I can re-create this issue.
Just as a workaround, one may edit /etc/netplan/01-netcfg.yaml
do the configuration in a persistent way there and do a netplan apply:
$ sudo netplan apply --dryrun
$ sudo netplan apply
Please notice that you should have your system always on the latest level -
means today in case of 18.04 it's 18.04.2 (incl. all patches) - 18.04.2
supersedes 18.04.1, but no need for a new install - just keep your system
up-to-date with:
sudo apt update && sudo apt full-upgrade
** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Also affects: iproute2 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Status: New => Triaged
** Changed in: ubuntu-z-systems
Importance: Undecided => Medium
** Attachment added: "recreate.txt"
https://bugs.launchpad.net/ubuntu/+source/iproute2/+bug/1838258/+attachment/5279819/+files/recreate.txt
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Touch seeded packages, which is subscribed to iproute2 in Ubuntu.
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
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