[root@web03 scripts]# cat prevent_arp.sh

#!/bin/bash

lo_ip=$(ip a s lo|grep "10.0.0.1[3]/32"|wc -l)

if [ $lo_ip -eq  ]

then

    ip addr add 10.0.0.13/ dev lo

fi

ip_cnf=$(egrep "net.ipv4.conf" /etc/sysctl.conf|wc -l)

if [ $ip_cnf -lt  ]

then

    cat >>/etc/sysctl.conf<<-EOF

    net.ipv4.conf.all.arp_ignore =

    net.ipv4.conf.all.arp_announce =

    net.ipv4.conf.lo.arp_ignore =

    net.ipv4.conf.lo.arp_announce =

    EOF

    sysctl -p

fi