[Bug 2052137] Re: bonded link goes down on reconfigure

[Nick Rosbrook]

Okay, I have attempted to backport this patch to Jammy today. However,
the upstream commit mentioned depends on another commit[1].
Unfortunately, I previously looked into backporting that commit in bug
2003250, but as I describe in the bug, it does not behave correctly when
backported to Jammy. The same issue came up today when I tested all of
these patches together. In particular, the bond is never fully
configured on boot, and the subordinate device is never fully re-
configured after `networkctl reconfigure`.

I do not have the time to investigate the root cause and write a proper
backport for these patches, so this will not be prioritized for 22.04.
Sorry :/

[1]
https://github.com/systemd/systemd/pull/25162/commits/ebf95ef2fa915a7f0e2e747651391f07aa2fb180

** Tags removed: systemd-sru-next

** Changed in: systemd (Ubuntu Jammy)
       Status: New => Confirmed

** Changed in: systemd (Ubuntu Jammy)
     Assignee: Nick Rosbrook (enr0n) => (unassigned)

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https://bugs.launchpad.net/bugs/2052137

Title:
  bonded link goes down on reconfigure

Status in systemd:
  Fix Released
Status in netplan.io package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Fix Released
Status in netplan.io source package in Jammy:
  Invalid
Status in systemd source package in Jammy:
  Confirmed

Bug description:
  systemd-networkd brings down member interfaces of a bond when they get
  reconfigured

  Jan 31 15:43:46 unique-slug systemd-networkd[2430]: pn1: Bringing link
  down

  This has a result that a server has complete downtime for a few
  seconds, this has also been reported upstream
  https://github.com/systemd/systemd/issues/31165.

  A pull request has been opened to fix this
  https://github.com/systemd/systemd/pull/31172

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