Network Solution ...

[smsabet00]

Hello Dears
Accept my apology
I hope this picture is more illustrative

What config should I use on the device to automatically use the link2 in case of link1 failure?

 

[chrihussey]

So it's layer 2 from the 4500 across the wireless to the computer in VLAN 40 between the two 2960s and a routed connection through the firewall to the 3900?

If so, I can't see how the 3900 route would ever become the preferred path as the wireless path would be the same local subnet.

The cleanest option would be to establish dynamic routing from the 4500 in both directions and then have the 3900 route the preferred path.

Hope that helps

[smsabet00]

Sorry
I changed the attached photo
I hope I can make clear my question.

[Leo Laohoo]

Either 3G/4G or wireless point-to-point bridge.

[PaulSmith]

If you could add an extra router you could use HSRP. One router for the wired and one for the wireless. Both routers could automatically failover to each other and you can choose the primary. You could also use  HSRP to have one vlan going over one router and one vlan going over the other if you wanted to.

[smsabet00]

Sorry; I can not add another router.
I changed the attached photo
I hope I can make clear my question.
Thanks