#!/bin/bash#chkconfig: 2345 50 50#description: real server init scriptVIP=192.168.80.80case $1 in"start")  echo "starting real server ..."  ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up  echo "1">/proc/sys/net/ipv4/conf/lo/arp_ignore  echo "2">/proc/sys/net/ipv4/conf/lo/arp_announce  echo "1">/proc/sys/net/ipv4/conf/all/arp_ignore  echo "2">/proc/sys/net/ipv4/conf/all/arp_announce;;"stop")  echo "stoping real server ..."  ifconfig lo:0 $VIP down  echo "0">/proc/sys/net/ipv4/conf/lo/arp_ignore  echo "0">/proc/sys/net/ipv4/conf/lo/arp_announce  echo "0">/proc/sys/net/ipv4/conf/all/arp_ignore  echo "0">/proc/sys/net/ipv4/conf/all/arp_announce;;"*")  echo "not suport option $1"  ;;esac