kayobe/nm-bridge-vlan-mtu-workaround-71d48d582b5e23d6.yaml at 3961c2ddbf9725647a84b09f04cb503fc7bb3c95 - kayobe - OpenDev: Free Software Needs Free Tools

openstack/kayobe

Pierre Riteau ee63b3253d Fix MTU of NetworkManager bridge VLAN interfaces

We are seeing an issue on Rocky Linux 9 where VLAN interfaces on bridges
have their MTU set to MTU-1 after rebooting. This is likely related to
how MTU is set by NetworkManager for bridges: it first sets the MTU to
MTU-1 before setting it to the correct value [1].

We can work around this issue by not explicitly setting the MTU
configuration on the VLAN interface if it is the same as the parent
bridge. It will be automatically inherited from the parent.

[1] 864872e9a8

Closes-Bug: #2039947
Change-Id: I23366f4de7842e7c2fe40e431fac76f26e9892de

2023-10-20 14:51:37 +02:00

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Raw Blame History

 ---
 fixes:
   - |
     Adds a workaround to avoid NetworkManager setting the MTU of bridge VLAN
     interfaces to an incorrect value.
     `LP#2039947 <https://bugs.launchpad.net/kayobe/+bug/2039947>`__