Problems with web-interface on PVE 5.2 host


Apr 2, 2017
I freshly installed PVE 5.2 and have some issues w network:

it worked well, then suddenly (while preparing VM for Graphics passthrough) I lost web-interface from external machine on same network.

I managed to finish passing through GPU to one of VMs and webinterfece generally works from VM but also drops and sometime it comes back and sometime no - so host restart needed. Ping from host to google is inconsistent, sometime there is no ping, and sometime it's ok and it could be 2 pings stopped restarted in a raw.

BUT - the VMs internet seems to be rock solid.
There is NO warning messages in host command-line.
Also in PVE 4.3..x everything was perfect with network for months on very same hw.

Is it Virtio? How to check virtual hub and all virtual network? Is there a dashboard for it?
Where to start to search for a problem please?
What logs and how to get them I might ned to look on to?
I might not upgrade to 5.3 right away.
Any ideas?



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