配置别名IP
方法1
[root@test ~]# ifconfig eth0:0 10.125.192.12/24 up
方法2
[root@test ~]# ip a add 10.125.192.12/24 dev eth0 label eth0:0
检查
[root@test ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:0F:0D:6F
inet addr:10.125.192.10 Bcast:10.125.192.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:38988 errors:0 dropped:0 overruns:0 frame:0
TX packets:25082 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:39630461 (37.7 MiB) TX bytes:3566143 (3.4 MiB)
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:0F:0D:6F
inet addr:10.125.192.12 Bcast:10.125.192.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
测试
ping -c 1 10.125.192.12
PING 10.125.192.12 (10.125.192.12) 56(84) bytes of data.
64 bytes from 10.125.192.12: icmp_seq=1 ttl=64 time=0.169 ms
关闭别名IP
方法1
[root@test ~]# ifconfig eth0:0 10.125.192.12/24 up
[root@test ~]# ip a del 10.125.192.12/24 dev eth0 label eth0:0
方法2
重启，临时IP重启失效
配置辅助IP
[root@test ~]# ip a add 10.125.192.12/24 dev eth0
检查
注：用ip添加的辅助IP 使用ifconfig是查看不到的
[root@test ~]# 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
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:0f:0d:6f brd ff:ff:ff:ff:ff:ff
inet 10.125.192.10/24 brd 10.125.192.255 scope global eth0
inet 10.125.192.12/24 scope global secondary eth0
测试
[root@test ~]# ping -c 1 10.125.192.12
PING 10.125.192.12 (10.125.192.12) 56(84) bytes of data.
64 bytes from 10.125.192.12: icmp_seq=1 ttl=64 time=0.032 ms
关闭辅助IP
[root@test ~]# ip a del 10.125.192.12/24 dev eth0