You can setup Linksys router as wireless bridge when you have to perform the following functions:
Important Note: When you set your Linksys Smart Wi-Fi router to the Bridge Mode, all of the router capabilities will get disabled. Your router will be converted into an access point. In addition, your router will stop acting as a DHCP server. The router’s built-in firewall and NAT features will not function.
Now, to setup Linksys router as wireless bridge, please carry out the instructions given here
Note: The router that you have set to the Bridge Mode must remain connected to your main router through the Ethernet cable. You cannot form a wireless connection between these two routers.
It is now time to connect your main router to the Linksys router’s Internet port. Note: The SSID or the Wireless Network Name for each router has to be different. You have now successfully set your Linksys Smart Wi-Fi router to Bridge Mode. You can now start using it as an access point. By doing this, you can extend your wireless network. We have now discussed the steps involved in setup Linksys router as wireless bridge.