单网卡绑定多ＩＰ

diandianrong

How can I bind multiple (virtual) IP addresses to a single network interface card ?
The following steps demonstrate how to configure the ethernet (elx0) device to support more than one IP address. 我的实验是基于Ｘ８６平台完成的，这里创建的是/etc/hostname.pcn0:1,后面出现的也要做相应的更改。

Create a text file in the /etc directory called hostname.elx0:1 and add this entry to file:
virtual

Add this IP address and hostname in the /etc/hosts file:
10.0.0.1    virtual

Create a new script file in the /etc/rc2.d directory called S70virtual, and add these entries in this file (for permanent change):
ifconfig elx0:1 10.0.0.1  up netmask 255.255.255.0

Reboot the system.
To delete a logical interface, use the unplumb command . For example,
example% ifconfig elx0:1 down unplumb will delete the logical interface  elx0:1.
bash-3.00# ifconfig -a
lo0: flags=2001000849 mtu 8232 index
1
        inet 127.0.0.1 netmask ff000000
pcn0: flags=1004843 mtu 1500 index 2
        inet 192.168.0.30 netmask ffffff00 broadcast 192.168.0.255
        ether 0:c:29:d3:fc:eb
pcn0:1: flags=1000843 mtu 1500 index 2
        inet 192.168.0.222 netmask ffffff00 broadcast 192.168.0.255
今日补充
看过ＳＡ－２９９后才知道，有一个更为简便的方法添加多块虚拟网卡：
bash-3.00#　ifconfig pcn0 addif 192.168.0.222 netmask 255.255.255.0
提示已经添加网卡pcn0:1　（不指定netmask也可以，则会使用默认的。）
bash-3.00#  ifconfig pcn0:1 up (必须执行此步骤，否则不会生效)
按些方法，你可以快速地添加第二块虚拟网卡，依此类推，该网卡命名方式为pcn0:2

以上方法是临时添加虚拟网卡的好方法，大家不妨一试。



本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/26090/showart_315834.html