Hi Arnaud:

Those parameters should be set in nova.conf, in the "os_vif_XXX" section [1].

"network_device_mtu" is deprecated. The interface MTU is retrieved from the network MTU. "ovs_vsctl_timeout" is deprecated too, we don't use vsctl commands anymore.

Maybe Nova folks can extend my answer.

Regards.

[1]https://github.com/openstack/nova/blob/50fdbc752a9ca9c31488140ef2997ed59d861a41/releasenotes/notes/libvirt-uses-os-vif-plugins-31a0617de0c248b9.yaml

On Fri, Mar 4, 2022 at 6:18 PM Arnaud Morin <arnaud.morin@gmail.com> wrote:

Hey all,

When I take a look at [1], I can see some parameters, such as
network_device_mtu, isolate_vif, etc.

As far as I can tell, nova is using these params when plugging the port
in OVS (if using OVS as ml2 plugin of course).

But I cannot find the config params in the documentation: [2]

Am I missing something?

Cheers,
Arnaud.

[1] https://github.com/openstack/os-vif/blob/master/vif_plug_ovs/ovs.py
[2] https://docs.openstack.org/nova/latest/configuration/config.html