> Dmitry Skorodumov <sdmitry <at> parallels.com> writes:
> 
> Windows-host with disabled TX-checksum offloading may send
> packets with tcp->checksum=0xffff. Most likely it is caused
> by by Windows algorithm for computing incremental checksum
> - see RFC 1624.

Forgot to mention that packets with checksum 0xffff appears almost 100%
if run from windows-host to kvm-guest

netperf -H <guest_addr> -t TCP_RR

Dmitry


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