Thanks for your answer Haydn, but I did not understand the issue too.
Victor has explained my problem clearly, is kvm uncapable of running
the bridge at 1GBit if it is not a e1000 network card?
Hey Miguel,
what Haydn meant was to force qemu to *emulate* a e1000 NIC instead of
the default RTL8139. That emulation is done by qemu in userspace and has
absolutely nothing to do with your physical NIC por the bridge.
Chosing a NIC is done with the "model=" parameter.
kvm -net nic,model=e1000
Even better performance-wise would be to use the new virtio interface
which paravirtualizes your physical NIC instead of emulating one.
For that, use:
kvm -net nic,model=virtio
Of course you'll need to install the corresponding drivers in your
guest. The e1000 should be supported in every guest and for the virtio
interface there are windows guest drivers (see the kvm-announce mailing
list for that) as well as linux guest drivers included in kernel 2.6.25
upwards.
By the way: This is good stuff f you're interested in hard disk
performance, too: http://kvm.qumranet.com/kvmwiki/Virtio
Felix
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