Rename the NIC name in centos7.x/RedHat7.x

Rename the NIC name in centos7.x/RedHat7.x

On CentOS7.x or RedHat7.x, the NIC naming rule is changed to default, which is automatically determined based on the firmware, topology, and location information. In this way, although there are benefits, it will also affect the operation, because the new naming rules are more difficult to read than the previous ones. If you want to modify it, follow these steps:

1. After the system is installed, the NIC information may be as follows:

1: lo: <LOOPBACK, UP, LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

Link/loopback 00: 00: 00: 00: 00: 00 brd00: 00: 00: 00: 00: 00

Inet 127.0.0.1/8 scope host lo

Valid_lft forever preferred_lft forever

Inet6: 1/128 scope host

Valid_lft forever preferred_lft forever

2: eno16777736: <BROADCAST, MULTICAST, UP, LOWER_UP> mtu 1500 qdisc pfifo_faststate UP qlen 1000

Link/ether 00: 0c: 29: 8b: e3: 0f brdff: ff

Inet 10.0.0.20/24 brd 10.0.0.255 scopeglobal eno16777736

Valid_lft forever preferred_lft forever

Inet6 fe80: 20c: 29ff: fe8b: e30f/64 scopelink

Valid_lft forever preferred_lft forever

2. Modify the NIC configuration file, Set NAME To eth0, and delete the DEVICE line.

[Root @ test ~] # Cd/etc/sysconfig/network-scripts/

Root @ test ~] # Vim ifcfg-eno16777736.

3. modify the configuration file name

[Root @ testnetwork-scripts] # Music ifcfg-eno16777736 ifcfg-eth0

[Root @ testnetwork-scripts] # cd

4. Modify/etc/sysconfig/grub and add net. ifnames = 0 biosdevname = 0.

[Root @ test ~] # Vim/etc/sysconfig/grub

Before modification:

GRUB_TIMEOUT = 5

GRUB_DEFAULT = saved

GRUB_DISABLE_SUBMENU = true

GRUB_TERMINAL_OUTPUT = "console"

GRUB_CMDLINE_LINUX = "crashkernel = auto rhgb quiet"

GRUB_DISABLE_RECOVERY = "true"

Modified content:

GRUB_TIMEOUT = 5

GRUB_DEFAULT = saved

GRUB_DISABLE_SUBMENU = true

GRUB_TERMINAL_OUTPUT = "console"

GRUB_CMDLINE_LINUX = "crashkernel = auto net. ifnames = 0 biosdevname = 0 rhgb quiet"

GRUB_DISABLE_RECOVERY = "true"

5. regenerate grub configuration and update Kernel Parameters

[Root @ test ~] # Grub2-mkconfig-o/boot/grub2/grub. cfg

Restart and view the changes.

6. Create a rule

If you have multiple NICs and want the controller device name, instead of naming the kernel as your own, you need to modify the rules.

[Root @ test ~] # Vim/etc/udev/rules. d/70-persistent-ipoib.rules

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR (address) =" 00: 0c: 29: 8b: e3: 0f ", ATTR (type) =" 1 ",

KERNEL = "eth *", NAME = "eth0"

Restart the system.