Setup routing failover on Cisco Router
Posted on 2013-01-15
I have a Cisco 3945 router (running 15.0(1r)M13).
I have 2 separate connections coming into this router. Both links connect to my 2nd office location.
I have a preferred path for traffic to use (link A) and a secondary link (link B) that I can use if the Link A ever were to go down.
All I need to do it go into my router and change the static route for the network in question, from using Link A to Link B, and that's all I need to do to failover.
My question is - is there an easy way to set this up to do this failover automatically? Can I put in multiple static routes and assign a cost? Is there anyway to *easily* do this without complicating my other hardware pieces?
Essentially all I need is for the router to somehow know primary path is down, and to use the secondary path.
Of course that means there has to be some logic for switching back too, once the link is back up, I haven't really thought about that yet.
Any suggestions would be helpful, but I'd like a simple solution, not something that complicates my environment much more.