Redundant Link

[Muhammad Kamran Shahzad]

Dear All
Please see my description and provide a solution

Assume that i have three sites (Site A, Site B, Site C) and i have multiple end users at Site C 
Site C receiving Bandwidth from Site B and Site A Via Radio Link
How can we configure a switch as Site A as priority and Site B on stand by
How to configure that if Site A is down and automatically traffic path will be Site B
Please note if Site A is down it might be down from remote site but at Site C we are still getting ethernet power in Switch
I Hope you guys understand my Query

Appreciate the best solution

[Rasika Nayanajith]

You can establish a point to point link & then run a routing protocol across one of those vlan will resolve your issue.

 You can have a look at this thread

https://community.cisco.com/t5/switching/good-solution/td-p/2417285 

HTH

Rasika

*** Pls rate all useful responses ****

[Muhammad Kamran Shahzad]

Thanks for your reply

Point to Point Links already established

If site A goes down then manually i need to plug in cable to select path to Site B

Can you please share protocols and where do i need to configure it.. If i configure these protocols at Site C will it resolve my issue

I have Cisco switches Layer 3 on every site

Please share your expertise 

Thanks