Abstract: In a distributed network system, resilient virtual fault tolerant service sessions are conducted between a host application program and a telnet client user over an end-to-end link including a telnet server, a messaging protocol process, a network driver, and a communication link. The telnet server establishes a tty type structure in response to a service request from a telnet user/client. This invention includes a service control block which controls the establishment of a tty and associated request control blocks and buffers for processing I/O requests. The session is functionally partitioned into an upper half session involving the host application program and the telnet server, and a lower half session involving the remainder of the network components leading to the telnet client.

Abstract: A method and system for preparing a suite of test scripts for testing a proposed network management application. The proposed network management application, termed a subsystem control facility (SCF), is first defined as a set of requirements with the aid of a developmental tool incorporating a subsystem knowledgebase and a test generation knowledgebase. The subsystem knowledgebase contains the rules governing the operation of a given network and a library of permitted commands, objects, attributes, modifiers and other data. The test generation knowledgebase includes information relating to those commands and object specific to the proposed subsystem control facility set of requirements. A user interface coupled to the knowledgebases permits the selection of types of tests and specific commands and objects to be tested.

Abstract: A technique for analyzing test results obtained by applying a binary table and a suite of test scripts to a test subsystem control facility for a distributed systems network. The binary table expresses a proposed set of requirements for a proposed subsystem control facility. The suite of test scripts is prepared from a knowledgebase containing test generation information relating to a predetermined global set of subsystem requirements. The test results are compared with the knowledgebase containing the predetermined set of subsystem requirements, and the relative performance of the proposed set of requirements with the predetermined set of subsystem requirements is graphically displayed or printed. The predetermined set of subsystem requirements includes rules governing the operation of a subject network and a library of permitted commands and object types. The proposed set of requirements includes paired selections of commands and object types from the library.

Abstract: A method and system for preparing a suite of test scripts for testing a proposed network management application. The proposed network management application, termed a subsystem control facility (SCF), is first defined as a set of requirements with the aid of a developmental tool incorporating a subsystem knowledgebase and a test generation knowledgebase. The subsystem knowledgebase contains the rules governing the operation of a given network and a library of permitted commands, objects, attributes, modifiers and other data. The test generation knowledgebase includes information relating to those commands and objects specific to the proposed subsystem control facility set of requirements. A user interface coupled to the knowledgebases permits the selection of types of tests and specific commands and objects to be tested.