I wonder why my network interface is still named eth0 in my kvm guests. udevadm just outputs# udevadm test-builtin net_id /sys/class/net/eth0 2> /dev/nullID_NET_NAME_MAC=enxc2184ae7ab3fI would expect them to be called like enpXsY. The directory /etc/udev/rules.d is empty. The Linux brand is Gentoo, 3.15.5-hardened-r2. Virtualization is KVM with qemu 2.0, the net interface is virtio. On the host and on other machines the setup is the same w.r.t. udev but the interfaces are called by their new names as expected.Why is this so?  What would it need to enable the new identifiers?My first thought was that the new identifiers refer to PCI devices, and that virtio devices are not PCI devices.  However, lspci proved me wrong:00:03.0 Ethernet controller: Red Hat, Inc Virtio network device    Subsystem: Red Hat, Inc Device 0001    Flags: bus master, fast devsel, latency 0, IRQ 11    I/O ports at c040 [size=32]    Memory at febd1000 (32-bit, non-prefetchable) [size=4K]    Expansion ROM at feb80000 [disabled] [size=256K]    Capabilities: [40] MSI-X: Enable+ Count=3 Masked-    Kernel driver in use: virtio-pci00:04.0 SCSI storage controller: Red Hat, Inc Virtio block device    Subsystem: Red Hat, Inc Device 0002    Flags: bus master, fast devsel, latency 0, IRQ 10                                        I/O ports at c000 [size=64]    Memory at febd2000 (32-bit, non-prefetchable) [size=4K]    Capabilities: [40] MSI-X: Enable+ Count=2 Masked-    Kernel driver in use: virtio-pciSo that's not the reason.
persistent network interface naming and kvm
udev;kvm;qemu;network interface