RAP failover to same controller, different interface?

[obi]

I have controller with two WAN connections, both own interface and static IP. Can I use LMS to create failover trough different WAN interfaces to same controller in case another WAN connection fails?  Or is this doable at all?

[cjoseph · Accepted solution]

Not sure if this is doable, because despite having two interfaces, the controller will only have a single best route back to the RAP out of a single interface.  That can certainly change, but ONLY if the physical controller interface goes down.  So if you have an upstream failure of a WAN connection, for example, the controller will not detect it.

[obi]

Ah, thats a bit turn off. Most likely its the upstream DSL link that fails than ethernet link between controller and DSL modem. I suppose I'll settle with some persistent options then. 

[mike.j.gallagher]

If you could do OSPF between the controller and your upstream routers and they can give you default route, you may be able to work something out.