Link aggregation using wireless and fiber optic

[deeu]

We want to design a network wherein if the wireless connection is lost/disconnected then it will utilize the fiber optic connection, and if we lose the fiber optic connection then we should be able to use the wireless connection. It would be from one building to another.

I am not sure where to start, all the google results are not helping as of now. Is this a "link aggregation"? A "trunking"? "Failover"?

Thank you so much, I hope I've rightfully asked the question. And if it is not in the correct section then please move it.

[marce1000]

         - How is this wireless connection between the buildings setup ?

 M.

[deeu]

The base building has a gigabeam and the client building has a litebeam, as of now.

[Joseph W. Doherty]

"Link aggregation" you want to use both links concurrently, if both "up" but continue to use one of them if the other is "down" regardless of which of the two is "up" or "down", correct?

What can be done, or not, depends much on whether your using the links as just L2 or L3 and what equipment is hosting the two links.  Further, if there's a large disparity in bandwidths between the two links, it might only make sense to use one of the two (i.e. the one with the greater bandwidth) if both are "up".  (The latter because equal link usage is much better supported than proportional link usage.) 

[deeu]

Yes, that is correct sir.

Our design will just be theoretical in nature, it would just be a proposal that is aimed to improve the current network architecture of our offices. We just want that we have a "back-up" connection just in case one is disconnected which often happens in our current wireless set-up as there are barriers (trees, etc) between the buildings.

[Joseph W. Doherty]

Okay, in theory then, usually no problem to have multiple links where you "prefer" which to use, and have the others as "back-ups", for either L2 or L3.

Using multiple links, concurrently, often a bit easier with L3 but sometime can be done with L2 too.  Again, when using multiple links, if a link fails, remaining links continue to carry traffic.

[deeu]

This is my initial design as of now. I can't seem to figure out how to connect wirelessly the access-point0 and access-point1. Is it even possible?

Any recommendations are most welcome.

[ammahend]

Is this production or some kind of class project ? 
At a very high level, You can do point to point bridge between APs, depending on distance you can use cisco traditional mesh or fluids mesh or ubiquity air fiber etc for longer distance like 1-10+ miles.

then you would do some form on policy based routing to distribute traffic between the 2 links or use one at a time and other for failover along with some form of IP SLA to check if the link of up before other link takes over. 
you can Google/YouTube with these key words now and ask if you have any specific question. 

[deeu]

It is only a class project sir. We just need to be able to design it in Cisco Packet Tracer, is this something that can be done with the packet tracer? I have been searching for "bridging", "repeater", etc. but I have yet to pick up something that I can use. I am stumped on how to wirelessly configure 2 access points. 

[Joseph W. Doherty]

Is it possible in PT?  Don't know.

Certainly possible in "real" networks.  BTW - some APs are designed for this purpose - usually have very directionally antenna (for a longer distance p2p wireless connection).