Hello Stefan,
Am 30.08.2017 um 19:17 schrieb Stefan Hajnoczi: > 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? > currently i can't reproduce the issue - even i was for two days. Currently i've no idea what has happend and will report back if it happens again. Thanks! Greets, Stefan
