On Tue, Jun 2, 2020 at 3:34 PM Anton Louw via Users <users@ovirt.org> wrote:

Hi Everybody,

I had a strange incident today.. One of my nodes restarted (Still busy investigating why), but my VMs powered own and moved to different nodes, the only issue is, it seemed to have changed the vlan ID on the NICs?

Which VLANs changed during the reboot of the host? Just the VLANs on the hosts NICs, in a way the VMs are still connected to the correct VLANs?

Has anybody seen this before?

It is possible to run a network configuration, which does not persist and is reverted during reboot this way. Please find more details in http://ovirt.github.io/ovirt-engine-api-model/master/#services/host/methods/... or the "Save network configuration" checkbox in the "Setup Host Networks" dialog. In recent oVirt versions this checkbox cannot be unselected anymore to avoid unexpected situations.

I am just trying to establish if this was changed on the node networking side, or inside of the VM.

If a virtual NIC is connected to a logical network with a VLAN tag, there is no intended way for the VM to modify this tag.

Thank you

*Anton Louw* *Cloud Engineer: Storage and Virtualization* at *Vox* ------------------------------ *T:* 087 805 0000 | *D:* 087 805 1572 *M:* N/A *E:* anton.louw@voxtelecom.co.za *A:* Rutherford Estate, 1 Scott Street, Waverley, Johannesburg www.vox.co.za

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