Dear @iVaibhav,

iVaibhav wrote

I am using two Internet Connections 60 Mbps and 50 Mbps on ER605

The Download speed is coming as expected, but the Upload speed doesn't seem to be doubling. 

Is this Normal Behavior ?

The Load Balancer will balance both inbound and outbound traffic, the only concern is that speedtest tool may not be able to test it correctly as the Load Balancer selects which line is based on session.

Generally speaking, when we run the speedtest with Multi Connections selected, the download speed will be tested by establishing many sessions with multiple servers, under low internet bandwidth (like 50Mbps), both internet lines can be fully utilized through the load balancer, that's why you can get a double result on the download speed. While during the upload test, only one session is established with one main server, which may result in that only one line is fully occupied while the other is idle, so that you only get the upload speed of one line.

Dear @iVaibhav,

iVaibhav wrote

Can you please suggest a reliable way to test if its working ?

Try P2P download, uploading and downloading large files/videos for testing.