centos 6 單網絡卡繫結雙ip
os：cnetos 6.8
初始網絡卡配置檔案
[root@localhost /]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
device=eth0
type=ethernet
uuid=d3fde489-9b67-453c-84df-4827f3becf1a
onboot=yes
nm_controlled=yes
bootproto=none
ipaddr=192.168.1.110
prefix=24
gateway=192.168.1.1
dns1=114.114.114.114
defroute=yes
ipv4_failure_fatal=yes
ipv6init=no
name="system eth0"
hwaddr=00:0c:29:f6:f8:a8
last_connect=1489157101
方法一：在原網絡卡配置檔案直接增加新ip
[root@localhost /]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
device=eth0
type=ethernet
uuid=d3fde489-9b67-453c-84df-4827f3becf1a
onboot=yes
nm_controlled=yes
bootproto=none
ipaddr=192.168.1.110
prefix=24
gateway=192.168.1.1
dns1=114.114.114.114
defroute=yes
ipv4_failure_fatal=yes
ipv6init=no
name="system eth0"
ipaddr2=192.168.1.111
prefix2=24
hwaddr=00:0c:29:f6:f8:a8
last_connect=1489129249
方法二：新增網絡卡配置檔案：
[root@localhost /]# cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0
[root@localhost /]# vim /etc/sysconfig/network-scripts/ifcfg-eth0:0
device=eth0:0
type=ethernet
uuid=d3fde489-9b67-453c-84df-4827f3becf1a
onboot=yes
nm_controlled=yes
bootproto=none
ipaddr=192.168.1.111
prefix=24
gateway=192.168.1.1
dns1=114.114.114.114
defroute=yes
ipv4_failure_fatal=yes
ipv6init=no
name="system eth0"
hwaddr=00:0c:29:f6:f8:a8
last_connect=1489130355
修改網絡卡配置檔案後，需要重啟網路服務才會生效：
[root@localhost /]# service network restart
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