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 NikolovOn Jan 11, 2020 19:54, Latchezar Filtchev <lat...@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
>
>  
>
>  
>
>  
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