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Problem determination on a Systems Network Architecture network has dealt mostly with error detection on physical network components. Adequate logical error-detection mechanisms associated with the logical network (software-related) errors have been only recently provided with the announcement of a new on-line interactive package called the Network Logical Data Manager (NLDM). This paper discusses the physical and logical network environments, logical network problems, and functions provided by the two releases of NLDM for logical problem determination. This paper first describes in more detail the differences between the physical and logical networks and how they intersect. Next it discusses the difficulties associated with logical problem determination and how NLDM can be used to aid in identifying logical @Copyright 1983 by International Business Machines Corporation. Copying in printed form for private use is permitted without payment of royalty provided that (1) each reproduction is done without alteration and (2) the Journal reference and IBM copyright notice are included on the first page. The title and abstract, but no other portions, of this paper may be copied or distributed royalty free without further permission by computerbased and other information-service systems. Permission to republish any other portion of this paper must be obtained from the Editor.
Problem determination on a Systems Network Architecture network has dealt mostly with error detection on physical network components. Adequate logical error-detection mechanisms associated with the logical network (software-related) errors have been only recently provided with the announcement of a new on-line interactive package called the Network Logical Data Manager (NLDM). This paper discusses the physical and logical network environments, logical network problems, and functions provided by the two releases of NLDM for logical problem determination. This paper first describes in more detail the differences between the physical and logical networks and how they intersect. Next it discusses the difficulties associated with logical problem determination and how NLDM can be used to aid in identifying logical @Copyright 1983 by International Business Machines Corporation. Copying in printed form for private use is permitted without payment of royalty provided that (1) each reproduction is done without alteration and (2) the Journal reference and IBM copyright notice are included on the first page. The title and abstract, but no other portions, of this paper may be copied or distributed royalty free without further permission by computerbased and other information-service systems. Permission to republish any other portion of this paper must be obtained from the Editor.
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