Cross-Zone Load Balancing

Cross-zone balancing

In Elastic Load Balancers, incoming traffic is distributed evenly across load balancer nodes in each AZ, which then forwards these requests to the targets registered within that AZ. However, Elastic Load Balancers allow us to enable cross-zone load balancing, where all load balancer nodes can distribute traffic to all available healthy targets, irrespective of their Availability Zone.

Let's look at the diagram given below to have a better understanding of how cross-zone load balancing works.