峰回路转 哪来回哪去 LINUX 路由脚本 ERIKXUE

[root@ERIKXUE Desktop]# ip ru sh

0: from all lookup local 

32766: from all lookup main 

32767: from all lookup default 

[root@ERIKXUE Desktop]# 

实现流量从哪个网卡来，就从哪个网卡回去

[root@ERIKXUE Desktop]# 

[root@ERIKXUE Desktop]# for i in `ip addr  | awk -F: ‘{ print $2 }‘  | grep -v lo | grep -v 0c | grep -v 00 `; do  echo $i; done | grep -v `route | grep default | awk -F" " ‘{print $8}‘` > /tmp/route_inside  //本机除了默认路由以外的网卡

[root@ERIKXUE Desktop]# for i in `ip addr  | awk -F: ‘{ print $2 }‘  | grep -v lo | grep -v 0c | grep -v 00 `; do  echo $i; done | grep -v `route | grep default | awk -F" " ‘{print $8}‘` | wc -l > /tmp/number_route  //统计网卡数目

[root@ERIKXUE Desktop]# w=`cat /tmp/route_inside | wc -l`  //给读取的数量赋值

[root@ERIKXUE Desktop]# for p in `cat  /tmp/route_inside`; //开始循环读取网卡名称（已经排除默                                                            认路由）

> do 

> TN=`echo $p | sed ‘s/[^0-9]//g‘`         //截取网卡内部数字，方便后面给路由表起名字，因为                                             路由表只允许数字，而且有的网卡是 eth1 eth2 但有                                             的网卡是p2p1 p2p2 等。所以只取数字。

> ip route flush table 12$TN;              清空路由表12$TN

> ip route add default via `ifconfig  $p |grep "inet addr" |cut -d: -f2 |cut -d" " -f1 | cut -d"." -f1,2,3`.254 dev $p src `ifconfig  $p |grep "inet addr" |cut -d: -f2 | cut -d" " -f1` table 12$TN;

> ip rule add from `ifconfig  $p |grep "inet addr" |cut -d: -f2 |cut -d" " -f1` table 12$TN; done;

[root@ERIKXUE Desktop]# rm -rf /tmp/route_inside 

[root@ERIKXUE Desktop]# rm -rf /tmp/number_route

[root@ERIKXUE Desktop]# ip ru sh

0: from all lookup local 

32763: from 192.123.123.1 lookup 123 

32764: from 10.0.0.1 lookup 122 

32765: from 192.168.100.23 lookup 120 

32766: from all lookup main 

32767: from all lookup default 

[root@ERIKXUE Desktop]# ip route

192.168.100.0/24 dev eth0  proto kernel  scope link  src 192.168.100.23 

192.123.123.0/24 dev eth3  proto kernel  scope link  src 192.123.123.1 

10.0.0.0/24 dev eth2  proto kernel  scope link  src 10.0.0.1 

172.16.0.0/16 dev eth1  proto kernel  scope link  src 172.16.0.3 

169.254.0.0/16 dev eth0  scope link  metric 1002 

169.254.0.0/16 dev eth1  scope link  metric 1003 

169.254.0.0/16 dev eth2  scope link  metric 1004 

169.254.0.0/16 dev eth3  scope link  metric 1005 

default via 172.16.0.1 dev eth1  proto static //默认路由，不需要设置从哪来就从那回

[root@ERIKXUE Desktop]# 

----------------------脚本如下----------------------

for i in `ip addr  | awk -F: ‘{ print $2 }‘  | grep -v lo | grep -v 0c | grep -v 00 `; do  echo $i; done | grep -v `route | grep default | awk -F" " ‘{print $8}‘` > /tmp/route_inside

for i in `ip addr  | awk -F: ‘{ print $2 }‘  | grep -v lo | grep -v 0c | grep -v 00 `; do  echo $i; done | grep -v `route | grep default | awk -F" " ‘{print $8}‘` | wc -l > /tmp/number_route

w=`cat /tmp/route_inside | wc -l`

for p in `cat  /tmp/route_inside`; 

do 

TN=`echo $p | sed ‘s/[^0-9]//g‘`

ip route flush table 12$TN;

ip route add default via `ifconfig  $p |grep "inet addr" |cut -d: -f2 |cut -d" " -f1 | cut -d"." -f1,2,3`.254 dev $p src `ifconfig  $p |grep "inet addr" |cut -d: -f2 | cut -d" " -f1` table 12$TN;

ip rule add from `ifconfig  $p |grep "inet addr" |cut -d: -f2 |cut -d" " -f1` table 12$TN; done;

rm -rf /tmp/route_inside 

rm -rf /tmp/number_route

————————————备用------写了好久-----ERIKXUE------------

默认路由对于的IP：  for i in `ifconfig |grep "inet addr" |cut -d: -f2 |cut -d" " -f1 | grep -v 127.0.0.1 `;do echo $i; done | grep `route | grep default | cut -d" " -f10 | cut -d"." -f1,2`

所有IP：   for i in `ifconfig |grep "inet addr" |cut -d: -f2 |cut -d" " -f1 | grep -v 127.0.0.1 `;do echo $i; done;

除了默认路由对应的IP ifconfig |grep "inet addr" |cut -d: -f2 |cut -d" " -f1 | grep -v 127.0.0.1 | grep -v `route | grep default | cut -d" " -f10 | cut -d"." -f1,2`

遍历ECHO 三次  for i in `ifconfig |grep "inet addr" |cut -d: -f2 |cut -d" " -f1 | grep -v 127.0.0.1 | grep -v $a`; do echo $i ; done

IPADDR=`ifconfig  eth1 |grep "inet addr" |cut -d: -f2 |cut -d" " -f1`

ip route flush table 121

ip route add default via 172.16.121.254 dev eth1 src $IPADDR table 121

ip rule add from $IPADDR table 121

route | grep default | awk -F" " ‘{print $8}‘

判断出 默认路由的网卡  route | grep default | awk -F" " ‘{print $8}‘

本机的网卡数目 ip addr  | awk -F: ‘{ print $2 }‘  | grep -v lo | grep -v 0c | grep -v 00 

本机除了默认路由以外的网卡

for i in `ip addr  | awk -F: ‘{ print $2 }‘  | grep -v lo | grep -v 0c | grep -v 00 `; do  echo $i; done | grep -v `route | grep default | awk -F" " ‘{print $8}‘` > /tmp/route_inside

统计网卡数目

for i in `ip addr  | awk -F: ‘{ print $2 }‘  | grep -v lo | grep -v 0c | grep -v 00 `; do  echo $i; done | grep -v `route | grep default | awk -F" " ‘{print $8}‘` | wc -l > /tmp/number_route

本文出自 “奋斗在京（ErikXUE）” 博客，请务必保留此出处http://erikxue.blog.51cto.com/3681540/1557468