[RHEL7.1]修改网卡命名方式 eno16777763变为eth0

RHEL7之前的网卡命名方式为eth0，改版后更为enoxxxxxxxx，使用起来很不方便，修改如下配置可将网卡命名方式变更为原来的方式，方法如下：

1. 变更之前网卡命名：

[root@bogon ~]# ip a

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

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    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_fast state UP qlen 1000

    link/ether 00:0c:29:32:5a:3b brd ff:ff:ff:ff:ff:ff

    inet 192.168.100.131/24 brd 192.168.100.255 scope global dynamic eno16777736

       valid_lft 1687sec preferred_lft 1687sec

    inet6 fe80::20c:29ff:fe32:5a3b/64 scope link 

       valid_lft forever preferred_lft forever

2. 编辑grub配置文件

[root@bogon ~]#

vim /etc/sysconfig/grub

GRUB_TIMEOUT=5

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevname=0 rhgb quiet"   #需要添加

GRUB_DISABLE_RECOVERY="true"

3. 生成启动配置文件

[root@bogon ~]#

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

Generating grub configuration file ...

Found linux image: /boot/vmlinuz-3.10.0-229.el7.x86_64

Found initrd image: /boot/initramfs-3.10.0-229.el7.x86_64.img

Found linux image: /boot/vmlinuz-0-rescue-22adb3ea314741fca53600ae4bc5fd2a

Found initrd image: /boot/initramfs-0-rescue-22adb3ea314741fca53600ae4bc5fd2a.img

done

4. 删除网卡

[root@bogon ~]#

nmcli device delete eno16777736

# eno16777736 为随机值

5. 添加网卡

[root@bogon network-scripts]#

nmcli connection add con-name eth0 ifname eth0 type ethernet

成功添加的连接 'eth0'（2a6e89b7-8fc4-4190-a000-e10cf436b0c7）。

[root@bogon ~]# ip a

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

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:32:5a:3b brd ff:ff:ff:ff:ff:ff

    inet 192.168.100.131/24 brd 192.168.100.255 scope global dynamic eth0

       valid_lft 1803sec preferred_lft 1803sec

    inet6 fe80::20c:29ff:fe32:5a3b/64 scope link 

       valid_lft forever preferred_lft forever