虚拟主机上给一个网卡设置多个IP地址
配置虚拟主机时有一种方式是在一块网卡上绑定多个IP，操作如下：
首先用ifconfig查看物理网卡
Shell代码
- [root@devserver1 ~]# ifconfig
- eth0 Link encap:Ethernet HWaddr 00:E0:4C:F1:5B:E3
- inet addr:192.168.0.66 Bcast:192.168.0.255 Mask:255.255.255.0
- inet6 addr: fe80::2e0:4cff:fef1:5be3/64 Scope:Link
- UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
- RX packets:136875410 errors:1514 dropped:0 overruns:0 frame:1
- TX packets:33575076 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:1000
- RX bytes:850013826 (810.6 MiB) TX bytes:550942326 (525.4 MiB)
- Interrupt:177 Base address:0x8000
- lo Link encap:Local Loopback
- inet addr:127.0.0.1 Mask:255.0.0.0
- inet6 addr: ::1/128 Scope:Host
- UP LOOPBACK RUNNING MTU:16436 Metric:1
- RX packets:9013362 errors:0 dropped:0 overruns:0 frame:0
- TX packets:9013362 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:0
- RX bytes:2146802575 (1.9 GiB) TX bytes:2146802575 (1.9 GiB)
[root@devserver1 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:E0:4C:F1:5B:E3
inet addr:192.168.0.66 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:4cff:fef1:5be3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:136875410 errors:1514 dropped:0 overruns:0 frame:1
TX packets:33575076 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:850013826 (810.6 MiB) TX bytes:550942326 (525.4 MiB)
Interrupt:177 Base address:0x8000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:9013362 errors:0 dropped:0 overruns:0 frame:0
TX packets:9013362 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2146802575 (1.9 GiB) TX bytes:2146802575 (1.9 GiB)
其中lo是本地回环，eh开头的是物理网卡,我只有一块网卡，所以显示eth0。
那么现在我们在eth0上绑定其他IP地址
Shell代码
- [root@devserver1 ~]# ifconfig eth0:1 192.168.0.201 netmask 255.255.255.0 up
- [root@devserver1 ~]# route add -host 192.168.0.201 dev eth0:1
- [root@devserver1 ~]#
- [root@devserver1 ~]# ifconfig eth0:2 192.168.0.202 netmask 255.255.255.0 up
- [root@devserver1 ~]# route add -host 192.168.0.202 dev eth0:2
[root@devserver1 ~]# ifconfig eth0:1 192.168.0.201 netmask 255.255.255.0 up [root@devserver1 ~]# route add -host 192.168.0.201 dev eth0:1 [root@devserver1 ~]# [root@devserver1 ~]# ifconfig eth0:2 192.168.0.202 netmask 255.255.255.0 up [root@devserver1 ~]# route add -host 192.168.0.202 dev eth0:2
eth0:n 这里的n可以自己随便设置
route 为新地址添加路由并且绑定在相应的eth0:n上
ok，现在在其他机器上ping一下，应该已经通了：）
注意：
1.这里绑定的其他IP，会在机器重启时消失，如果想永久绑定，就需要在开机时写一个shell,把上边的shell贴在：
(/etc/rc.local)文件里就OK了：）
2.删除绑定IP：
Shell代码
- [root@localhost etc]# ifconfig eth0:1 down
- [root@localhost etc]# ifconfig eth0:2 down
[root@localhost etc]# ifconfig eth0:1 down [root@localhost etc]# ifconfig eth0:2 down
3.删除路由(如果已经删除绑定IP,路由会自动消失)
Shell代码
- [root@devserver1 ~]# route del 192.168.0.201 dev eth0:1
- [root@devserver1 ~]# route del 192.168.0.202 dev eth0:2
[root@devserver1 ~]# route del 192.168.0.201 dev eth0:1 [root@devserver1 ~]# route del 192.168.0.202 dev eth0:2
附加：
如何启动/禁用网卡
启用
Shell代码
- ifconfig eth0 up
ifconfig eth0 up
禁用
Shell代码
- ifconfig eth0 down
ifconfig eth0 down
给网卡赋予静态ip
Shell代码
- ifconfig eth0 192.168.1.101
ifconfig eth0 192.168.1.101