Sorry, I am little confused., 
trying to understand the documentation.
From following If i select Balanced mode, and eth1 fails, all the traffic will route to eth0. Right?
Am I understanding wrong here…
Provider1: network interface eth1, weight 100
Provider2: network interface eth0, weight 50
If balanced mode is selected, the server will route a double number of connections on Provider1 over Provider2.
If active backup mode is selected, the server will route all connection on Provider1; only if Provider1 become unavailable connections will be redirected to Provider2.