virtual machines network goes 100Mbit when interface is Gbit

[Miguel Araujo <maraujo@Nosys.net>]

Hello all,

I'm testing the last kvm version, 62. I was doing an iperf benchmark to 
test the network performance in a Feisty virtual machine and I got 
values surround 100Mbits when my card is actually 1Gbit.  The testing 
environment is conformed by 2 machines, both with Gbit interfaces. The 
vm in kvm is running in server mode, the other (not virtualized one) is 
the client. The vm interface is going to a bridge called br0. Ethtool 
says the interface is running 100Mbits but it doesn't let me change the 
speed or any other parameter in the vm.

I can't either change tap0 parameters in kvm host. ¿Is anyone having the 
same issue?¿am I forgetting something?

Thanks for your time in advanced,
     Miguel

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