It’s a “FAIL OVER TESTING” across the Load balancers in real time environment. All expected load generation will generated through the load balancer. Load balancers and networks shouldn’t actually be
Causing performance problems or bottlenecks, but if they are, some configuration changes will usually remedy the problem. Load balancers are conceptually quite simple. They take the incoming load of client requests and distribute that load across multiple server resources. When configured correctly, a load balancer rarely causes a performance problem. The only way to ensure that a load balancer is configured properly is to test it under load before it’s put into use in the production system. The bottom line is that if the load balancer isn’t speeding up our site or increasing the volume it can handle, it’s not doing its job properly and needs to be reconfigured.

Sravan Tadakamalla
Microsoft Communities