Hi Stefan, No I don't have this behaviour. I only remember probleme with old debian wheezy with kernel 3.2, where I had this kind of problem. (seem to be a problem in virtio-net driver in 3.2)
Do you known exactly where the packet is lost ? (do you have used tcpdump on tap interface too ?) mtu size is enough big on bridge && taps vs mtu in your vms ? ----- Mail original ----- De: "Stefan Priebe, Profihost AG" <s.pri...@profihost.ag> À: "pve-devel" <pve-devel@pve.proxmox.com> Envoyé: Mardi 22 Août 2017 08:04:18 Objet: [pve-devel] lost tcp packets in bridge Hello, while running PVE 4.4 i'm observing lost tcp packets on a new cluster. Two VMs are connected to the same bridge on the same host using virtio and linux as a guest. But the target guest does not receive all tcp packets some get lost. I see them leaving on the source using tcpdump but they do not arrive at the target network card (checked using tcp dump). This results in sometimes awfully slow performance as tcp retransmits happen. I already flushed all iptables rules - but this did not help. I can't reproduce the issue it just happens "sometimes" with some packets. Has anybody already ovserved something like this? Greets, Stefan _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
