CentOS7网卡变更eth0

  1. 系统默认安装后查看网卡信息
[root@manager ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:c8:11:8f brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.4/24 brd 192.168.1.255 scope global noprefixroute dynamic enp0s3
       valid_lft 917sec preferred_lft 917sec
    inet6 fe80::3128:b894:cf8c:84de/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:e7:1e:6c brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.101/24 brd 10.0.0.255 scope global noprefixroute dynamic enp0s8
       valid_lft 894sec preferred_lft 894sec
    inet6 fe80::7a92:e9a4:ace5:5761/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:b0:1e:1f brd ff:ff:ff:ff:ff:ff
    inet 172.16.1.101/24 brd 172.16.1.255 scope global noprefixroute dynamic enp0s9
       valid_lft 947sec preferred_lft 947sec
    inet6 fe80::6985:d953:b059:3a23/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
  1. 修改网卡配置文件中的 DEVICE= 参数的关于 eth0

enp0s3-eth0; enp0s8-eth1;enp0s9-eth2
eth0:192.168.1.4/24 NAT
eth1:10.0.0.88/24 主机网络
eth2:172.16.1.88/24 主机网络

[root@manager network-scripts]# ls
ifcfg-enp0s3  ifdown-bnep  ifdown-post    ifdown-TeamPort  ifup-eth   ifup-plusb   ifup-Team         network-functions
ifcfg-enp0s8  ifdown-eth   ifdown-ppp     ifdown-tunnel    ifup-ippp  ifup-post    ifup-TeamPort     network-functions-ipv6
ifcfg-enp0s9  ifdown-ippp  ifdown-routes  ifup             ifup-ipv6  ifup-ppp     ifup-tunnel
ifcfg-lo      ifdown-ipv6  ifdown-sit     ifup-aliases     ifup-isdn  ifup-routes  ifup-wireless
ifdown        ifdown-isdn  ifdown-Team    ifup-bnep        ifup-plip  ifup-sit     init.ipv6-global
[root@manager network-scripts]# mv ifcfg-enp0s3 ifcfg-eth0
[root@manager network-scripts]# mv ifcfg-enp0s8 ifcfg-eth1
[root@manager network-scripts]# mv ifcfg-enp0s9 ifcfg-eth2
[root@manager network-scripts]# ls
ifcfg-eth0  ifdown-bnep  ifdown-post    ifdown-TeamPort  ifup-eth   ifup-plusb   ifup-Team         network-functions
ifcfg-eth1  ifdown-eth   ifdown-ppp     ifdown-tunnel    ifup-ippp  ifup-post    ifup-TeamPort     network-functions-ipv6
ifcfg-eth2  ifdown-ippp  ifdown-routes  ifup             ifup-ipv6  ifup-ppp     ifup-tunnel
ifcfg-lo    ifdown-ipv6  ifdown-sit     ifup-aliases     ifup-isdn  ifup-routes  ifup-wireless
ifdown      ifdown-isdn  ifdown-Team    ifup-bnep        ifup-plip  ifup-sit     init.ipv6-global

[root@manager network-scripts]# vim ifcfg-eth0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
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
UUID=859b346f-9cfc-4187-bd9e-c273b7fb3fce
DEVICE=eth0
ONBOOT=yes
IPADDR=192.168.1.88
NETMASK=255.255.255.0
GATEWAY=192.168.1.2

[root@manager network-scripts]# vim ifcfg-eth1
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
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=eth1
UUID=98407e48-5902-4a11-b126-29137e0ab2a1
DEVICE=eth1
ONBOOT=yes
IPADDR=10.0.0.88
NETMASK=255.255.255.0

[root@manager network-scripts]# vim ifcfg-eth2
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
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=eth1
UUID=98407e48-5902-4a11-b126-29137e0ab2a1
DEVICE=eth1
ONBOOT=yes
IPADDR=10.0.0.88
NETMASK=255.255.255.0
  1. 因 CentOS7 采用 grub2 引导，还需要对 grub2 进行修改，编辑 /etc/default/grub 配置文件，在 GRUB_CMDLINE_LINUX 这个参数后面加入 net.ifnames=0 biosdevname=0
vi /etc/default/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 rhgb quiet net.ifnames=0 biosdevname=0"
GRUB_DISABLE_RECOVERY="true"
  1. 用 grub2-mkconfig 命令重新生成GRUB配置并更新内核
[root@manager network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-957.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-957.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-6e8f6c379c2049368c464f05700a7bba
Found initrd image: /boot/initramfs-0-rescue-6e8f6c379c2049368c464f05700a7bba.img
done
  1. 重启系统并验证
[root@manager network-scripts]# reboot
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