Nic emulation supported by xen

The following emulated network interface cards are available for Xen HVM guests in Xen 3.4:
  • e100
  • e1000
  • rtl8139
  • ne2k_pci
  • pcnet
Emulation is done by Qemu-dm running for each Xen HVM guest. Intel e1000 is known to be the best performing emulated NIC. Even faster is to use PV-on-HVM drivers, which totally bypasses emulation.