千兆/万兆网络自动切换脚本

需求：现在IDC需要改造万兆网络，由于是单链路，前期需要利用现有的千兆网络来做冗余，当万兆网络出问题以后自动切换到千兆环境，确保网络自动恢复；

 

#!/bin/bash
# * *******************************************************************************************************
# * Date:        2015-10-16
# * Author:      Created by Ctry
# * Email:       554248852@qq.com
# * Description: OS7.1 When the network problems,automatic network switching.
# * Filename:    network_switch.sh
# * Version:     1.1
# * Last modified: 2015-10-16 14:24
# * *******************************************************************************************************
LIP="172.16.34.143"
WIP=`cat /tmp/p1p1.tmp`
echo ${WIP}
QIP=`cat /tmp/em1.tmp`
echo ${QIP}
ping -c10 172.16.34.1 > /tmp/ping.log
if [[ $? -ne 0 && ${WIP} == ${LIP} ]]
then
        echo "$(date +%F_%T) Now, network switch to 1GB link...!"
        echo "$(date +%F_%T) Now, network switch to 1GB link...!"  >> /tmp/$(hostname -s).switch.log
        /sbin/ifdown p1p1 ; /sbin/ifup em1 ; /sbin/ifdown p1p1 ; /sbin/ifup em1
    /sbin/ifconfig em1|awk -F"[: ]+" 'NR==2{print $3}' > /tmp/em1.tmp
    true > /tmp/p1p1.tmp
    WPLOSS=`cat /tmp/ping.log|grep loss|awk '{print $6}'|awk -F"%" '{print $1}'`
    if [[ "${WPLOSS}" -gt 50 && "${WIP}" == ${LIP} ]]
    then
            echo "$(date +%F_%T) Now, network switch to 1GB link...!"
            echo "$(date +%F_%T) Now, network switch to 1GB link...!"  >> /tmp/$(hostname -s).switch.log
            /sbin/ifdown p1p1 ; /sbin/ifup em1 ; /sbin/ifdown p1p1 ; /sbin/ifup em1
        /sbin/ifconfig em1|awk -F"[: ]+" 'NR==2{print $3}' > /tmp/em1.tmp
        true > /tmp/p1p1.tmp
    fi
fi

ping -c10 172.16.34.1 > /tmp/ping.log
if [[ $? -ne 0 && ${QIP} == ${LIP} ]]
then
        echo "$(date +%F_%T) Now, network switch to 10GB link...!"
        echo "$(date +%F_%T) Now, network switch to 10GB link...!"  >> /tmp/$(hostname -s).switch.log
        /sbin/ifdown em1 ; /sbin/ifup p1p1 ; /sbin/ifdown em1 ; /sbin/ifup p1p1
    /sbin/ifconfig p1p1|awk 'NR==2{print $2}' > /tmp/p1p1.tmp
    true > /tmp/em1.tmp
    QPLOSS=`cat /tmp/ping.log|grep loss|awk '{print $6}'|awk -F"%" '{print $1}'`
    if [[ "${QPLOSS}" -gt 50 && "${QIP}" == ${LIP} ]]
    then
            echo "$(date +%F_%T) Now, network switch to 10GB link...!"
            echo "$(date +%F_%T) Now, network switch to 10GB link...!"  >> /tmp/$(hostname -s).switch.log
            /sbin/ifdown em1 ; /sbin/ifup p1p1 ; /sbin/ifdown em1 ; /sbin/ifup p1p1
        /sbin/ifconfig p1p1|awk 'NR==2{print $2}' > /tmp/p1p1.tmp
        true > /tmp/em1.tmp
    fi
fi

W=`/sbin/ifconfig p1p1|awk 'NR==2{print $2}'`
Q=`/sbin/ifconfig em1|awk -F"[: ]+" 'NR==2{print $3}'`

if [[ "${W}" == ${LIP} && "${Q}" == ${LIP} ]]
then
    /sbin/ifdown em1 ; /sbin/ifup p1p1
fi

if [[ "${W}" == ${LIP} ]]
then
    echo ${LIP} > /tmp/p1p1.tmp
else
    true > /tmp/p1p1.tmp
fi

if [[ "${Q}" == ${LIP} ]]
then
    echo ${LIP} > /tmp/em1.tmp
else
    true > /tmp/em1.tmp
fi

最后利用nohup配合while循环来实现实时监控网络情况：

#!/bin/bash
# * *******************************************************************************************************
# * Date:        2015-10-16
# * Author:      Created by Ctry
# * Email:       554248852@qq.com
# * Description: Run a network_switch script  every ten seconds
# * Filename:    network_sleep1.sh
# * Version:     1.1
# * Last modified: 2016-1-8 18:24
# * *******************************************************************************************************
while true
do
/bin/sh /server/scripts/network_switch.sh >> /tmp/$(hostname -s).switch.log 2>&1
sleep 10
done