Dear Strahi,

I tried rtl8139. The behavior is the same.

Best,

Latcho

From: Strahil <hunter86_bg@yahoo.com>
Sent: Sunday, January 12, 2020 1:19 AM
To: Latchezar Filtchev <Latcho@aubg.bg>; users <users@ovirt.org>
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 <Latcho@aubg.bg> 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.

Best,

Latcho