"Linux has been able do multipath routing for a long time: it means
being able to have routes with multiple gateways and to use them in a
(weighted) round-robin fashion. But Linux is missing a tool to
actively monitor the state of internet uplinks and change the routing
accordingly. Without it, from a LAN perspective, it's like having a
RAID-0: just one uplink goes down and all of your LAN-to-WAN traffic
goes down too. Documentation and examples on the subject are lacking;
existing solutions are few and deeply integrated in firewall/routing
specific distributions. To address these issues, a new standalone tool
was just released: Fault Tolerant Router. It also includes a complete
(iptables + ip policy routing) configuration generator."

-- source: http://linux.slashdot.org/story/15/03/03/1910206

Cheers, Peter
--
Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ
http://www.cms.waikato.ac.nz/~fracpete/         Ph. +64 (7) 858-5174
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