Please read the original article -请阅读原始文章- How To: Load Balancing & Failover With Dual/ Multi WAN / ADSL / Cable Connections on Linux如何：负载平衡与容错移转与双/多湾/ ADSL的/电缆连接在Linux上 . 。 It contains detailed information with a sample script.它包含的详细资料与示例脚本。 Viliam Kočinský modified my script to send email when routing table changes. viliam kočinský修改我的脚本来发送电子邮件时，路由表的变化。 Also he is starting the script as a service from /etc/init.d.此外，他是开始的脚本作为一个服务从的/ etc / init.d 。 Read below for his enhancements:阅读下面的他的改进：


I’m using your gwping script.我使用您的gwping脚本。 Realy usefull.真的有用。 I added posibility to send email, when routing table change:我已将posibility发送电子邮件时，路由表的变化：

# cat /usr/local/sbin/gwping ＃猫在/ usr / local / sbin / gwping
……. … … 。

EMAILFROM="root@myserver.example.com" emailfrom = “ root@myserver.example.com ”
EMAILTO="someone@example.com" emailto = “ someone@example.com ”
….. … ..

if [[ $CLS1 -eq 0 || $CLS2 -eq 0 ]]; then如果[元cls1 -情商0 | |元cls2 -情商0 ] ，然后
if [[ $LLS1 -eq 1 && $LLS2 -eq 0 ]]; then如果[元lls1 -情商1 ＆ ＆元lls2 -情商0 ] ，然后
echo Switching to $NAME2回声切换至name2
ip route replace default scope global via $GW2 dev $EXTIF2 IP路由取代预设的范围，全球经元gw2开发元extif2
LSROUTE=$(ip route show) lsroute = $ （ IP路由查看）
echo "$LSROUTE" | mail -s "GWPING - Routing table changed. Line $NAME1 is down."回声“ $ lsroute ” |邮件- S的“ gwping -路由表的改变。线元n ame1是下来” 。 -r $EMAILFROM $EMAILTO - R的元emailfrom元emailto
elif [[ $LLS1 -eq 0 && $LLS2 -eq 1 ]]; then elif [元lls1 -情商0 ＆ ＆元lls2均衡器一] ，然后
echo Switching to $NAME1回声切换至name1
ip route replace default scope global via $GW1 dev $EXTIF1 IP路由取代预设的范围，全球经元gw1开发元extif1
LSROUTE=$(ip route show) lsroute = $ （ IP路由查看）
echo "$LSROUTE" | mail -s "GWPING - Routing table changed. Line $NAME2 is down."回声“ $ lsroute ” |邮件- S的“ gwping -路由表的改变。线元n ame2是下来” 。 -r $EMAILFROM $EMAILTO - R的元emailfrom元emailto
elif [[ $LLS1 -eq 0 && $LLS2 -eq 0 ]]; then elif [元lls1 -情商0 ＆ ＆元lls2 -情商0 ] ，然后
echo Restoring default load balancing回声恢复默认负载平衡
#ip route replace default scope global via $GW1 dev $EXTIF1 ＃ IP路由取代预设的范围，全球经元gw1开发元extif1
ip route replace default scope global nexthop via $GW1 dev $EXTIF1 weight $W1 nexthop via $GW2 dev $EXTIF2 weight $W2 IP路由取代预设的范围，全球nexthop经元gw1开发元extif1重量元的W1 nexthop经元gw2开发元extif2重量元w2
LSROUTE=$(ip route show) lsroute = $ （ IP路由查看）
echo "$LSROUTE" | mail -s "GWPING - Routing table changed. Both lines are up."回声“ $ lsroute ” |邮件- S的“ gwping -路由表的改变。两种线了” 。 -r $EMAILFROM $EMAILTO - R的元emailfrom元emailto
fi Fi的
fi Fi的
sleep $SLEEPTIME睡眠元sleeptime
done做完

Also I’m starting this script as service from /etc/init.d还我开始此脚本作为服务的/ etc / init.d

# cat /etc/init.d/gwping ＃猫的/ etc / init.d / gwping
#!/bin/sh ＃ ！ / bin / sh的
# Author: Viliam Kocinsky ＃作者： viliam kocinsky

### BEGIN INIT INFO ＃ ＃ ＃开始的init信息
# Short-Description: Monitor Internet access connection links and modify kernel route if some link go down. ＃短期描述：监察互联网接入连接链接和修改内核的路线，如果某种联系下去。
# Description: This is startup script for gwping script, that manage internet connection failover (if you have at least 2 providers). ＃描述：这是启动脚本为gwping脚本，即管理的网际网路连线故障（如果您有至少2提供商） 。
# That is, it reguraly ping one IP address ＃是，它reguraly平一个IP地址
# on internet through certain provider (but trying all) . ＃在互联网上通过一定的提供商（但尝试所有） 。 If ping doesn’t come back, than it addjust kernel route table.如果ping不回来，比addjust内核路由表。
# See inside script for details. ＃看到里面的脚本的细节。 This script is from the website:此脚本是从网站：
# http://blog.taragana.com/index.php/archive/how-to-load-balancing-failover-with-dual-multi-wan-adsl-cable-connections-on-linux/ ＃ http://blog.taragana.com/index.php/archive/how-to-load-balancing-failover-with-dual-multi-wan-adsl-cable-connections-on-linux/
# ＃
### END INIT INFO ＃ ＃ ＃结束的init信息

command="$1"指挥= “ $ 1 ”

case "$command" in案“ ，元军司令部”在
start)开始）
echo "Starting gwping."回声“开始gwping ” 。
/usr/local/sbin/gwping &在/ usr / local / sbin / gwping ＆
echo $!回声元！ > /usr/local/share/gwping_pid >在/ usr / local /共享/ gwping_pid
;; ; ;
stop)停止）
echo "Stoping gwping."回声“回采gwping ” 。
kill -9 $(cat /usr/local/share/gwping_pid) && rm /usr/local/share/gwping_pid杀死-9元（猫在/ usr / local /共享/ gwping_pid ） ＆ ＆室在/ usr / local /共享/ gwping_pid
;; ; ;
*) * ）
echo "Usage /etc/init.d/gwping start|stop"回声“用法的/ etc / init.d / gwping开始|一站式”
;; ; ;
esac