| author | ms.service | ms.topic | ms.date | ms.author |
|---|---|---|---|---|
kumudD |
load-balancer |
include |
11/09/2018 |
kumud |
An Azure load balancer is a Layer-4 (TCP, UDP) load balancer. The load balancer provides high availability by distributing incoming traffic among healthy service instances in cloud services or virtual machines in a load balancer set. Azure Load Balancer can also present those services on multiple ports, multiple IP addresses, or both.
You can configure a load balancer to:
- Load balance incoming Internet traffic to virtual machines (VMs). We refer to a load balancer in this scenario as an Internet-facing load balancer.
- Load balance traffic between VMs in a virtual network (VNet), between VMs in cloud services, or between on-premises computers and VMs in a cross-premises virtual network. We refer to a load balancer in this scenario as an internal load balancer (ILB).
- Forward external traffic to a specific VM instance.