[Qemu-devel] virtio: network: lost tcp/ip packets

[Stefan Priebe - Profihost AG]

Hello,

i've a problem with two VMs running on the SAME host machine using qemu
2.7.1 or 2.9.0 and vhost_net + virtio.

Sometimes TCP packets going from machine a to machine b are simply lost.
I see them in VM A using tcpdump going out but they never come in on
machine B. Both machines have iptables and stuff turned off.

On the host both VMs network interfaces are connected to the same bridge.

Any ideas? May be a known bug?

Host and Guest Kernel is an OpenSuSE 42.3 kernel based on vanilla 4.4.82.

Thanks!

Greets,
Stefan