RHEL 7网卡默认命名规则：以太网卡(Ethernet)为enX，无线网卡(WLAN)为wlX，修改网卡命名规则为ethX如下：
1、修改/etc/sysconfig/grub文件，添加net.ifnames=0 biosdevname=0
[root@rhel73-std ~]# cat /etc/sysconfig/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=auto net.ifnames=0 biosdevname=0 rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet"
GRUB_DISABLE_RECOVERY="true"
[root@rhel73-std ~]#
2、备份/boot/grub2/grub.cfg后，重新生层grub.cfg配置文件，使用命令：grub2-mkconfig -o /boot/grub2/grub.cfg
[root@rhel73-std ~]# cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.old
[root@rhel73-std ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-514.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-514.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-59ad3ea4c90948209723894c6c92587b
Found initrd image: /boot/initramfs-0-rescue-59ad3ea4c90948209723894c6c92587b.img
done
[root@rhel73-std ~]#
3、重命名网卡配置文件为ifcfg-ethX，修改配置文件中的name和device值，并删除配置文件中UUID行（重启后ethX的UUID数值不一致），然后重启服务器
[root@rhel73-std ~]# mv /etc/sysconfig/network-scripts/ifcfg-en33 /etc/sysconfig/network-scripts/ifcfg-eth0
[root@rhel73-std ~]# mv /etc/sysconfig/network-scripts/ifcfg-en34 /etc/sysconfig/network-scripts/ifcfg-eth1
[root@rhel73-std ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=192.168.254.120
PREFIX=24
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_PRIVACY=no
[root@rhel73-std ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth1
DEVICE=eth1
ONBOOT=no
[root@rhel73-std ~]# reboot
4、对比修改前和修改后
[root@rhel73-std ~]# ip addr
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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: ens33: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:43:bd:56 brd ff:ff:ff:ff:ff:ff
inet 192.168.254.120/24 brd 192.168.254.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::4dda:101e:ccdd:882a/64 scope link
valid_lft forever preferred_lft forever
3: ens34: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:43:bd:60 brd ff:ff:ff:ff:ff:ff
[root@rhel73-std ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:43:bd:56 brd ff:ff:ff:ff:ff:ff
inet 192.168.254.120/24 brd 192.168.254.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::6d3b:9b3c:81db:9d30/64 scope link
valid_lft forever preferred_lft forever
3: eth1: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:43:bd:60 brd ff:ff:ff:ff:ff:ff
[root@rhel73-std ~]#