From mboxrd@z Thu Jan  1 00:00:00 1970
From: Martin Mailand <martin@tuxadero.com>
Subject: Re: weird packet loss between two VMs
Date: Mon, 05 Mar 2012 18:43:42 +0100
Message-ID: <4F54FB4E.8040000@tuxadero.com>
References: <CANj2EbczGGp3sFSTFyygE8PAou3g+5pvhPwERjQvAfngypoO9A@mail.gmail.com>
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Cc: kvm@vger.kernel.org
To: Simon Chen <simonchennj@gmail.com>
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Hi Simon,
you are using a 100Mbits nic and you try to send with 600M, try a 
1000Mbits on the sending site as well.

-martin

Am 05.03.2012 00:57, schrieb Simon Chen:
> For the two VMs, one is using 100M VNIC, the other is using 1000M one.
> The vnet interfaces for the two VMs are put on two bridges on the two
> servers, both tap into the second vlan. I then run iperf to send UDP
> packets from the 100M VM to the 1000M VM using the following
> parameter:
> iperf -c 10.6.6.17 -t 30 -i 2 -r -b 600M