On Fri, Aug 18, 2017 at 04:40:36PM +0200, Stefan Priebe - Profihost AG wrote: > 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.
Have you tcpdumped the tap interfaces on the host?
