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[Bug 2115800] [NEW] systemd-networkd on noble with PreferredSource does not install routes

 

Public bug reported:

Ubuntu Release:
Description:    Ubuntu 24.04.2 LTS
Release:        24.04

Version of package:
systemd:
  Installed: 255.4-1ubuntu8.8
  Candidate: 255.4-1ubuntu8.8

Issue:
Routes with PreferredSource are not being installed properly. There's also an upstream bug report about this: https://github.com/systemd/systemd/issues/31950

Example .network config:

```
[Match]
Name=bond0

[Address]
Address=10.10.10.100/32
Peer=10.10.10.98/32

[Route]
Gateway=10.10.10.98
PreferredSource=10.10.10.100

[Address]
Address=fd00:abcd:cafe:babe::5406/120

[Route]
Gateway=fd00:abcd:cafe:babe::5401
PreferredSource=fd00:abcd:cafe:babe::5406

[Network]
VLAN=bond0.200
IPv6AcceptRA=no
DNS=185.12.64.1
DNS=185.12.64.2
```

Expected behaviour: Routes with PreferredSource are being installed
properly.

Actual behaviour: Not all routes with PreferredSource are being
installed.


Upstream fix that was not included in v255 and would need a backport: https://github.com/systemd/systemd/pull/33875

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2115800

Title:
  systemd-networkd on noble with PreferredSource does not install routes

Status in systemd package in Ubuntu:
  New

Bug description:
  Ubuntu Release:
  Description:    Ubuntu 24.04.2 LTS
  Release:        24.04

  Version of package:
  systemd:
    Installed: 255.4-1ubuntu8.8
    Candidate: 255.4-1ubuntu8.8

  Issue:
  Routes with PreferredSource are not being installed properly. There's also an upstream bug report about this: https://github.com/systemd/systemd/issues/31950

  Example .network config:

  ```
  [Match]
  Name=bond0

  [Address]
  Address=10.10.10.100/32
  Peer=10.10.10.98/32

  [Route]
  Gateway=10.10.10.98
  PreferredSource=10.10.10.100

  [Address]
  Address=fd00:abcd:cafe:babe::5406/120

  [Route]
  Gateway=fd00:abcd:cafe:babe::5401
  PreferredSource=fd00:abcd:cafe:babe::5406

  [Network]
  VLAN=bond0.200
  IPv6AcceptRA=no
  DNS=185.12.64.1
  DNS=185.12.64.2
  ```

  Expected behaviour: Routes with PreferredSource are being installed
  properly.

  Actual behaviour: Not all routes with PreferredSource are being
  installed.

  
  Upstream fix that was not included in v255 and would need a backport: https://github.com/systemd/systemd/pull/33875

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