Dear Strahi,

I tried rtl8139. The behavior is the same.


From: Strahil <>
Sent: Sunday, January 12, 2020 1:19 AM
To: Latchezar Filtchev <>; users <>
Subject: Re: [ovirt-users] Unstable VM network connectivity after upgrade 4.2.8 
to 4.3.7

Hi Latcho,

Most probably it's a bug.
Have you tried  virtio and/or rtl-based  NIC ?

As far as I know, CentOS 5 supports Virtio after Kernel >= 2.6.25 .

Best Regards,
Strahil Nikolov
On Jan 11, 2020 19:54, Latchezar Filtchev 
<<>> wrote:

Hello Everyone,

I am aware my guest OS is out of support but I experienced the following:

oVirt – 4.2.8 (self-hosted engine)

VM – CentOS 5.2; two VNIC’s ( driver used e1000) connected to different VLAN’s; 
 - no issues with network connectivity

After upgrade to oVirt 4.3.7

The same VM starts normally. Network is available for several seconds (10 – 20 
pings) and then it disappears. The machine works but no ping to/from VM. When I 
am returning the same machine (via export domain) to oVirt 4.2.8 environment – 
it works as expected.

Can someone advise on this? Any help will be greatly appreciated.

Thank you.



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