on some Oracle Linux 7 VMs I see that dropped RX packets continue to increase.

The eth0 interface is virtio for all of them.

When running tcpdump on eth0 the counter stop increasing and so it means tcpdump does capture them

I found some references about these kind of rx dropped frames with CentOS 7 too and other distros with new kernels.

eg:

and

In my case it doesn't seem that the nature of the dropped packages is STP, but IP6

On my VMs I have disabled ipv6

I see that in about 100 seconds I have 180 dropped frames occured, and when running tcpdump for the same amount of time I have in it about 180 DHCPv6 packets, so I presume it is it the responsible

Any way to avoid this, at VM or hypervisor level?

Thanks in advance,

Gianluca