All 3 IPs are public and seperate. Only one will be operational at any given point of time

On Mon, 10 Jan 2005 Adil Kodian wrote :

-----Original Message----- From: linuxers-bounces@mm.ilug-bom.org.in [mailto:linuxers-bounces@mm.ilug-bom.org.in]On Behalf Of Mangesh V Rakhunde Sent: Monday, January 10, 2005 10:13 AM To: linuxers@mm.ilug-bom.org.in Subject: [ILUG-BOM] Failover Ethernet Connections

Hi

Directly coming to the point. Suppose I have 3 ethernet connections from 3 diff. ISPs. How can I make failover from one to another. Like suppose first fails second shud come up if second fails the 3rd shud takeover and restore 1st connection when it comes up.

More correctly - you need to first decide- do you need incoming access or outgoing access ?

And, do you have a fixed IP ?

for incoming access - you need a fixed IP and need to involve all the 3 ISPs by asking them to update their routing table to include a route to your IP/ IP subnet. If they hardwire the rules, then youve also got loadsharing on your incoming pipe.

lookup BGP on linux for configuring outgoing access - it isnt trivial, but is hasslefree once youre setup.