dmesg | grep eth
[    1.558586] e1000 0000:01:05.0: eth0: (PCI:33MHz:32-bit) 00:30:59:06:15:00
[    1.558596] e1000 0000:01:05.0: eth0: Intel(R) PRO/1000 Network Connection
[    1.585328] e100 0000:01:08.0: eth1: addr 0xfeb9e000, irq 20, MAC addr 00:30:59:06:39:4a
[   21.908754] udevd[458]: renamed network interface eth0 to eth3
[   21.940741] udevd[472]: renamed network interface eth1 to eth4
[   23.425688] ADDRCONF(NETDEV_UP): eth3: link is not ready
[   23.449709] e1000: eth3 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[   23.452679] ADDRCONF(NETDEV_CHANGE): eth3: link becomes ready
[   23.470448] ADDRCONF(NETDEV_UP): eth4: link is not ready
[   33.560019] eth3: no IPv6 routers present