How to test
- Start a widows guest with two PCI NICs (such as: 1th NIC is of 8139 model and 2th NIC is fo e1000 model)
- Note the PCI slot numbers of the two NIC in guest(my computer -> properties -> hardware -> the NIC properites).
- Shutdown the guest
- Remove the 1th NIC (such as: e1000 model) and start the guest
- Check that the slot number of the 2th NIC hasn't changed