[CentOS] CentOS 7 Lost NIC

Hello,

I have a big problem with my servers.

I have 4 NIC on all my KVM Servers but the most time on a start (restart) I 
lost one NIC? It is not always the same, but this two are virtio NICs.

with ifup eth0(1) the system say,I have no configured eth0 or eth1 file ?

Can any tell me what I can do?

thank's for a answer

NetworkManager is disabled.
-- 
mit freundlichen Grüßen / best regards,

  Günther J. Niederwimmer