Node capability parameter configuration is the validation and settings of node capability parameter values according to node capability parameter configuration specification (CapSpc). A node capability is a property of a node required as basis for service implementation. This paper presents a Node Capability Parameter Configuration System (CapCon). Node Capability Ontology (CapOnt) is the basis for CapCon. This paper has focus on CapCon in network management. CapSpc specifies required types, parameters, and parameter values for the node capabilities. OWL and OWL/XDD are used to represent the ontology concepts. The NETCONF framework is applied for the network management functionality. A prototype implementation and a case study including experimental results are presented.