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askvictor
Asked: 2011-01-26 01:21:15 +0800 CST

Get linux to change default route if one path goes down?

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I'm configuring a gateway/router linux box. It is performing masquerading/NAT. The primary Internet interface is a 3G modem, but if that goes down, I would like it to try a different interface automatically. How would I go about doing this? Can the routing rules automatically cater for this, or should I get it to periodically check if the 3G connection is up, and if not, try the other?

Cheers,

Victor

routing linux-networking

2 Answers

  1. Best Answer

    This blog entry explains how to setup multiple routes for Linux in some detail.

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  2. Just set a second default gateway, linux will do the failover by itself.

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