> On Jun 8, 2015, at 11:12 AM, Peter Lieven <p...@kamp.de> wrote: > > Am 28.05.2015 um 16:24 schrieb Vadim Rozenfeld: >> On Thu, 2015-05-28 at 16:07 +0200, Peter Lieven wrote: >>> Hi, >>> >>> we observed problems with Windows Update Services and Uploading Files from >>> a Windows System to other systems. >>> We tracked this down to IPv6 connections only. IPv4 and IPv6 in Receive >>> direction seems to be not a problem. >>> It turned out that setting TCP/UDP Checksum Offloading for IPv6 from "RX/TX >>> enabled" to RX "enabled" in the >>> Network Driver settings solved the issue. I remember similar problems >>> existed with Linux some time ago. >>> Linux guests on the same host are also not an issue. >>> >>> Is this a known issue? I tried latest and stable drivers from the Fedora >>> Website. >>> >> Adding Yan. > > Hi Yan, > > have you had a chance to look at this or a hint where to start? >
Sorry Peter, somehow I missed the email and saw it only now. * When you experience the issues is it between VMs on the same host? * Can you describe your host network configuration? * Can provide the output for "ethtool -k” for every NIC (including tap devices) in the host that is involved with the VM that has a problem? * What are the host kernel version, QEMU version and guest driver version you are using? Thanks, Yan. > Thanks, > Peter > >