LVS real server start/stop script

lvs_real.sh

#!/bin/bash
#description : start realserver
VIP=172.16.6.8
/etc/init.d/functions
case "$1" in
start)
      /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
      /sbin/route add -host $SNS_VIP dev lo:0
      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
      echo "RealServer Start OK"
      ;;
stop)
      /sbin/ifconfig lo:0 down
      route del $SNS_VIP >/dev/null 2>&1
      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 "RealServer Stoped"
      ;;
*)
      echo "Usage: $0 {start|stop}"
      exit 1
esac
exit 0

Should be:
/sbin/route add -host $VIP dev lo:0 in your case.

B.T.W. kevin, do you know what the meaning of SNS in $SNS_VIP stands for?