Kubernetes is designed to rely on automatically configured network environments of the cloud provider (e.g. AWS, Azure, GCE, etc). Thus Kubernetes does not natively offer an implementation of network load balancers (Services of type LoadBalancer) for on-prem bare-metal clusters.
Netris creates the necessary services for your Kubernetes deployments in real-time. This is accomplished via the Netris-Operator which inspects events in the Kubernetes API message stream, and can detect the request for a L4LB service and instantiate the load balancer exactly as described in your k8s deployment YAMLs.