Hi, Until now I was under the impression that a VM could not move more than ~200.000pps or ~1.5Gbit on mtu 1500 on one VIF - in XENs case due to the netback process being single threaded. But here they apparently get line-rate 10G on a single vif one-core VM (+800.000pps), using standard KVM and virtio (this is not documented in the post, I asked them). http://opencontrail.org/evaluating-opencontrail-virtual-router-performance/ This seems almost unreal to me - but maybe I’m missing something. Is Xen currently able to do this ? Thanks Kristoffer