If a service is created with the spec.LoadBalancerClass field set, metallb should ignore it and not handle it, because it's supposed to be handled by another loadbalancer.

Always

1. Create a service of type loadbalancer with the loadbalancerclass set
2.
3.

MetalLB handles it, assignes it an ip and announces it according to the configuration

MetalLB should ignore it because that service is supposed to be handled by another balancer.