The SoftLayer_Network_LBaaS_Listener API service allows consumers to add, edit and delete load balancers protocols for front- and backends. In order to retrieve list of front- and backends protocols please refer to [SoftLayer_Network_LBaaS_LoadBalancer](/reference/datatypes/SoftLayer_Network_LBaaS_LoadBalancer) service. A listener object specifies the protocol and port of allowed incoming network requests and the maximum number of accepted connections. It has references to its associated load balancer and default pool object.
Update (create) load balancers front- and backend protocols and return load balancer object with listeners (frontend), pools (backend), server instances (members) and datacenter populated. Note if a protocolConfiguration has no listenerUuid set, this function will create the specified front- and backend accordingly. Otherwise the given front- and backend will be updated with the new protocol and port.