macvtap with disconnected physical interface

[Gionatan Danti]

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?

Regards.

-- 
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti at assyoma.it - info at assyoma.it
GPG public key ID: FF5F32A8