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Re: [Qemu-devel] Windows2012R2 virtio-win drivers and IPv6

From: Vadim Rozenfeld
Subject: Re: [Qemu-devel] Windows2012R2 virtio-win drivers and IPv6
Date: Fri, 29 May 2015 00:24:32 +1000

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.

Best regards,
> Thanks,
> Peter

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