vi /etc/rc.conf
以下是我在虚拟机中的一个绑定多IP示例：
# Created: Sat Apr 10 17:06:56 2010
# Enable network daemons for user convenience.
# Please make all changes to this file, not to /etc/defaults/rc.conf.
# This file now contains just the overrides from /etc/defaults/rc.conf.
# — sysinstall generated deltas —
ifconfig_em0=”inet 192.168.245.11 netmask 255.255.255.0″
gateway_enable=”NO”
defaultrouter=”192.168.245.2″
hostname=”192.168.245.11″
ifconfig_em0=”inet 192.168.245.14 netmask 255.255.255.0″
ifconfig_em0_alias0=”inet 192.168.245.15 netmask 255.255.255.0″
ifconfig_em0_alias1=”inet 192.168.245.16 netmask 255.255.255.0″
ifconfig_em0_alias2=”inet 192.168.245.17 netmask 255.255.255.0″
defaultrouter=”192.168.245.2″
hostname=”192.168.245.11″
sshd_enable=”yes”
最后执行如下命令，让rc.conf立即生效
# sh /etc/rc