CentOS virt - Feb 2017 - Network Problem

Hello List,

I have two Server with CentOS 7.(3) and KVM, on both a have the Problem with 
the network ?

I have configured 4 NIC on the slave KVM, the most time only 3 NIC is starting 
sometime only 2 NIC ?

two nic are configured as "hostdev" the other two NIC are configures
from  two
bridge (Host) the default KVM Bridge and a created "br0" over a phys
NIC.

The most time this br0 -> eth1 is lost  in the KVM Client ?

after a restart mostly all is OK.

Have any a idea why ?

-- 
mit freundlichen Gr?ssen / best regards

  G?nther J. Niederwimmer