# $# 表示提供到shell脚本或者函数的参数总数；

# 1表示只有一个参数。

#/bin/bash

#file: tun_RS.sh

if [ $# -ne 1 ];

then

echo “usage: $0 virtualIP”

echo “such as : $0 172.19.58.200″

exit 0

fi

VIP=$1

# RS 无需转发

echo “0” >/proc/sys/net/ipv4/ip_forward

# modify eth0 mtu to 1440 for TCP server

/sbin/ifconfig eth0 mtu 1440

# 配置tunl0

/sbin/ifconfig tunl0 up

/sbin/ifconfig tunl0 ${VIP} broadcast ${VIP} netmask 0xffffffff up

/sbin/route add -host ${VIP} dev tunl0

# 解决arp的问题

echo 1 > /proc/sys/net/ipv4/conf/tunl0/arp_ignore

echo 2 > /proc/sys/net/ipv4/conf/tunl0/arp_announce

echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore

echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce

# 解决rp_filter的问题

echo 0 > /proc/sys/net/ipv4/conf/tunl0/rp_filter

echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter

# end of tun_RS.sh