CentOS7 modify Nic name

CentOS7 modify Nic name
Port naming rules for CentOS7

1. Nic ports before CentOS6/RHEL6 are named eth *

   After CentOS7/RHEL7, the gigabit network port is emN or enp * (N = integer), and The 10-Gigabit network port is p1p2.

Steps for modifying the mode to eth

1. Edit File

   1) vi/etc/sysconfig/grub

   GRUB_TIMEOUT = 5

   .................
   

   GRUB_CMDLINE_LINUX = "rd. lvm. lv = centos/swap vconsole. font = latarcyrheb-sun16

   Net. ifnames = 0 biosdevname = 0rd. lvm. lv = centos/root crashkernel = auto

   Vconsole. keymap = us rhgb quiet"

   ...................

Note: The above marked red is the part to be modified

2) execute the command to take effect

Grub2-mkconfig-o/boot/grub2/grub. cfg

3) Add the planning file vi/etc/udev/rules. d/70-persistent-net.rules.

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 74: 20: cb: xx: 45 ",

ATTR {type} = "1", KERNEL = "eth *", NAME = "eth0"

..........................

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 00: 87: 6e: xx: 86 ",

ATTR {type} = "1", KERNEL = "eth *", NAME = "ethN"

Restart the system!

In addition, we recommend that you write HWADDR in each/etc/sysconfig/network-scripts/ifcfg-eth * Nic configuration file to avoid exceptions!