1. A method of subsetting a group comprising a plurality of server systems, comprising: configuring a server system of the plurality of server systems with a group name and a group port; configuring the server system with a subset name and a subset part of at least one subset of the plurality of server systems in the group; registering the server system with a system routing entity as being part of the group name and the group port; and registering the server system with the system routing entity as being part of the subset name and the subset port.