net.ifnames & biosdevname

 

linux现在使用sysfs取代过去devfs,/sys目录用于存放动态设备节点,udev透过/sys目录生成/dev目录

biosdevname规则: 

• Embedded network interface
  em[1...]
• PCI card network interface
  p[slot]p[ethernet port]          p3p4
• Virtual function
  p[slot]p[ethernet port]          p3p4_1

net.ifnames规则:

• en  <==> Ethernet
• wl  <==> wireless LAN (wlan)
• ww <==> wireless wide area network (wwan)
• o on-board
• s [f][d] hotplug slot index number
• x MAC address
• ps[f][d] PCI geographical location
• ps[f][u][i] USB port number chain
  enp0s3     stands for Ethernet.PCI bus 0  slot 3