How to detect a dead ISP in a multihomed Linux router and route traffic
through alternate ISP?
I am currently using a Linux box (CentOS 5.9) as my router. The router is
multihomed and uses two ISP to connect to the internet. Internet traffic
from the LAN is distributed through both the lines.
When a particular ISP connection goes down I had to manually route the
traffic through the other ISP. What is the best way to detect a dead ISP
gateway and route traffic through the alternate ISP connection?
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