#!/bin/bash

 vip=x.x.x.x

 case $ in

 start)

     echo  > /proc/sys/net/ipv4/conf/all/arp_ignore

     echo  > /proc/sys/net/ipv4/conf/ethX/arp_ignore

     echo  > /proc/sys/net/ipv4/conf/all/arp_announce

     echo  > /proc/sys/net/ipv4/conf/ethX/arp_announce

     ifconfig lo: $vip netmask 255.255.255.255 broadcast $vip up

     ;;

 stop)

     ifconfig lo: down

     echo  > /proc/sys/net/ipv4/conf/all/arp_ignore

     echo  > /proc/sys/net/ipv4/conf/ethX/arp_ignore

     echo  > /proc/sys/net/ipv4/conf/all/arp_announce

     echo  > /proc/sys/net/ipv4/conf/ethX/arp_announce

     ;;

 esac