分享RouterOSv7下多线宽带故障转移设置

tbc3211

一般家用就是路由表的pppoe相关条目上启用check-gateway=ping就完事了。但这只是检测本地-ISP的链路是否正常，ISP-公网出了故障无法被检测。

实际上我们需要检测到公网的链路是否正常就要用递归路由(recursive routing)的方式，欺骗设备下一跳为某个非直连的ip地址(一般为公网DNS地址)。

注意参考这个脚本https://gist.github.com/marfilla ... ac22f2849e099a1c6a1

其中关键是这一坨

1. # recursive routes for default gateways, dst-address are public DNS servers
   
2. add dst-address=64.6.64.6/32 gateway=ether1 scope=10 comment="ISP1"
   
3. add dst-address=208.67.220.220/32 gateway=ether1 scope=10 comment="ISP1"
   
4. add dst-address=208.67.222.222/32 gateway=ether2 scope=10 comment="ISP2"
   
5. add dst-address=64.6.65.6/32 gateway=ether2 scope=10 comment="ISP2"
   
6. 
   
7. # load-balanced w/ auto failover default gateways
   
8. add check-gateway=ping distance=1 dst-address=0.0.0.0/0 gateway=64.6.64.6 routing-table=to_ISP1 scope=10 target-scope=11
   
9. add check-gateway=ping distance=2 dst-address=0.0.0.0/0 gateway=64.6.65.6 routing-table=to_ISP1 scope=10 target-scope=11
   
10. add check-gateway=ping distance=1 dst-address=0.0.0.0/0 gateway=208.67.222.222 routing-table=to_ISP2 scope=10 target-scope=11
    
11. add check-gateway=ping distance=2 dst-address=0.0.0.0/0 gateway=208.67.220.220 routing-table=to_ISP2 scope=10 target-scope=11

复制代码

scope=10代表下一跳为直连 64.6.64.6 64.6.65.6这些都是外网dns，实际替换为国内dns地址即可。

greney

感谢分享此技术

Joe_Li

腳本好用～牛

liuleisail

收藏一下。点赞

Sumnus

国内dns 会一直变么？