ISP1:192.168.160.2

ISP2:172.16.250.2

Eth0:192.168.160.128

Eth1:172.16.250.128

企业双线接入方案

1 建立路由策略表

[root@node1 ~]# vi /etc/iproute2/rt_tables

100     tele1

102     tele2

添加如上两行

建立各个ISP网络对对应接口的路由

Ip route  add  192.168.160.0/24 dev eth0 src 192.168.160.128 table  tele1

Ip route  add  172.16.250.0/24 dev eth1 src 172.16.250.128 table  tele2

添加各个ISP的网关

Ip route add default via 192.168.160.2  table  tele1

Ip route add default via 172.16.250.2  table  tele2

添加路由策略从各个接口发送的数据可以发送到到各个ISP的路由表上面

Ip rule add from 192.168.160.128 table tele1

Ip rule add from 172.16.250.128 table  tele2

添加一个默认网关

Ip route add default via 172.16.250.2 dev eth1

Ip route show

[root@cluster2 ~]# ip route list

192.168.228.0/24 dev eth1  proto kernel  scope link  src  192.168.228.128

192.168.0.0/24 dev eth0   proto kernel  scope link  src 192.168.0.180

169.254.0.0/16 dev eth1   scope link

default via 192.168.228.128 dev eth1

以上实现了从哪里来从哪里出去(从出口路由器的角度来考虑)

做负载均衡,带宽加起来!

删除上面的网关

Shell> Ip route del default via 172.16.250.2

Shell> Ip route add default scope global nexthop via 192.168.160.2 dev eth0 weight 1 nexthop via 172.16.250.2 dev eth1 weight 1

[root@cluster2 ~]# ip route list

192.168.228.0/24 dev eth1  proto kernel  scope link  src 192.168.228.128

192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.180

169.254.0.0/16 dev eth1  scope link

default

nexthop via 192.168.0.180  dev eth0 weight 1

nexthop via 192.168.228.128  dev eth1 weight 1

by huzi1986