CentOS单网卡绑定双IP

初始网卡配置文件

[root@Container ~]# vim /etc/sysconfig/network-scripts/ifcfg-enp3s0f0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
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=enp3s0f0
UUID=64c6147b-3a90-496b-bf00-4cfee85deebb
DEVICE=enp3s0f0
ONBOOT=yes
IPADDR=202.205.161.98
PREFIX=23
IPV6_PRIVACY=no
GATEWAY=202.205.160.1
DNS1=202.205.161.113
DNS2=202.205.160.3
DNS3=219.142.50.126

方法一：在原网卡配置文件直接增加新IP

[root@Container ~]# vim /etc/sysconfig/network-scripts/ifcfg-enp3s0f0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
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=enp3s0f0
UUID=64c6147b-3a90-496b-bf00-4cfee85deebb
DEVICE=enp3s0f0
ONBOOT=yes
IPADDR=202.205.161.98
PREFIX=23
IPV6_PRIVACY=no
GATEWAY=202.205.160.1
DNS1=202.205.161.113
DNS2=202.205.160.3
DNS3=219.142.50.126

NAME=enp3s0f0
IPADDR2=202.205.161.112
PREFIX=23
GATEWAY=202.205.160.1

方法二：新增网卡配置文件：

新配置文件 修改IP地址及网卡名称DEVICE=enp3s0f0:0 IPADDR=202.205.161.112

[root@Container ~]# cp /etc/sysconfig/network-scripts/ifcfg-enp3s0f0  /etc/sysconfig/network-scripts/ifcfg-enp3s0f0:0

[root@Container ~]# vim /etc/sysconfig/network-scripts/ifcfg-enp3s0f0:0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
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=enp3s0f0
UUID=64c6147b-3a90-496b-bf00-4cfee85deebb
DEVICE=enp3s0f0:0
ONBOOT=yes
IPADDR=202.205.161.112
PREFIX=23
IPV6_PRIVACY=no
GATEWAY=202.205.160.1
DNS1=202.205.161.113
DNS2=202.205.160.3
DNS3=219.142.50.126

修改网卡配置文件后，需要重启网络服务才会生效：

systemctl restart network

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绑定跨网段IP地址

可能会有网络波动闪断问题

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
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=eth1
UUID=6d3be542-fc48-4a27-b051-9bc03daa4613
DEVICE=eno1
ONBOOT=yes
IPADDR=202.205.161.96
PREFIX=23
GATEWAY=202.205.160.1
DNS1=202.205.160.3
DNS2=219.142.50.126
IPV6_PRIVACY=no
IPADDR1=219.143.195.83
PREFIX1=28
GATEWAY=219.143.195.81