[ovirt-users] Bizzare oVirt network problem

[FERNANDO FREDIANI]

Hello.

I am facing a pretty bizzare problem in two of my Nodes running oVirt. A 
given VM running a few hundred Mbps of traffic simply stops passing 
traffic and only recovers after a reboot. Checking the bridge with 
'brctl showmacs BRIDGE' I see the VM's MAC address missing during this 
event.

It seems the bridge simply unlearn the VM's mac address which only 
returns when the VM is rebooted.
This problems happened in two different Nodes running in different 
hardware, in different datacenter, in different network architecture, 
different switch vendors and different bonding modes.

The main differences these Nodes have compared to others I have and 
which don't show this problem are:
     - The CentOS 7 installed is a Minimal installation instead of oVirt-NG
     - The Kernel used is 4.12 (elrepo) instead of the default 3.10
     - The ovirtmgmt network is used also for the Virtual Machine 
showing this problem.

Has anyone have any idea if it may have anything to do with oVirt (any 
filters) or any of the components different from a oVirt-NG installation ?

Thanks
Fernando
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