Centos如何快速绑定多个IP(一个配置文件即可）

东郭玄清

　　
有时候，我们购买了5个IP，13个IP，难道都要一个一个的来写配置文件吗？Centos如何快速绑定多个IP？可否做到一个配置文件即可？可以！
可以在/etc/sysconfig/network-scripts下创建一个range文件
比如，vi /etc/sysconfig/network-scripts/ifcfg-eth0-range0

DEVICE=eth0
BOOTPROTO=static
HWADDR=00:1c:c0:fd:0f:27
IPADDR_START=64.120.228.163
IPADDR_END=64.120.228.166
CLONENUM_START=1
NETMASK=255.255.255.248
ONBOOT=yes
TYPE=Ethernet

CLONENUM_START — 网络克隆接口的启始号. # eg “1″  生成的网络接口会从 eth0:1开始。
然后重启网络让IP生效： service network restart


NETMASK 子网掩码 参考表：
 
/29 (5 usable) NETMASK = 255.255.255.248
/28 (13 usable) NETMASK = 255.255.255.240
/27 (29 usable) NETMASK = 255.255.255.224
/26 (61 usable) NETMASK = 255.255.255.192
/25 (125 usable) NETMASK = 255.255.255.128
/24 (253 usable) NETMASK = 255.255.255.0
IP段/28举例: 64.120.220.224/28
The first two IPs (network & gateway) and the last IP (broadcast) in your assignment are unusable for you.

Network: 64.120.220.224
Gateway: 64.120.220.225
Broadcast: 64.120.220.239
Useable IPs: 64.120.220.226-238 (13 useable)
NETMASK = 255.255.255.240