macvtap with disconnected physical interface
Daniel P. Berrangé
berrange at redhat.com
Tue May 3 08:31:41 UTC 2022
On Mon, May 02, 2022 at 03:42:05AM +0200, Gionatan Danti wrote:
> Dear list,
> I just discovered the hard way that if the lower lever physical interface of
> a macvlan bridge is disconnected (ie: by unplugging the eth cable, resulting
> in no carrier), inter-guest network traffic from all virtual machines bound
> to the disconnected interface is dropped.
>
> This behavior surprises me, as with the classic bridges I can disconnect the
> underlying physical interface without causing any harm to inter-guest
> traffic.
>
> Am I doing something wrong, or this really is the expected behavior? If so,
> can I force the macvtap interfaces to bridge traffic even when the
> underlying physical interface is disconnected?
Can you share the <interface> configuration for your guest NIC so we
can see how it is setup.
With regards,
Daniel
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