Diagnosis and design for diagnosability for Internet routers

摘要

This paper deals with diagnosis and design for diagnosability at the system level. In particular, diagnosis and design for diagnosability of high-end Internet routers in manufacturing test and design validation are considered. A packet flow model is used for diagnosis down to the replaceable unit level. The diagnosis method operates correctly when there are multiple or intermittent faults. A diagnosability criterion is proposed and a method for assessing diagnosability of various designs given. The paper concludes with a description of empirical results from an industrial application of the diagnosis method