Each of the steps just described is part of the process to set up a reactive

Each of the steps just described is part of the

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generated and sent to the network management system. Each of the steps just described is part of the process to set up a reactive system. When performance becomes unacceptable because of an exceeded user-defined threshold, the system reacts by sending a message. also permits proactive methods: e.g., network simulation can be used to project how network growth will affect performance metrics. Such simulation can alert administrators to impending problems so that counteractive measures can be taken.
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PERFORMANCE MANAGEMENT SUB-CATEGORIES AND RELATED ACTIVITIES Collecting Baseline Utilization Data · Measuring link utilization using a probe · Counting packets received/transmitted by a specific device · Measuring device processor usage · Monitoring device queue lengths · Monitoring device memory utilization · Measuring total response times Collecting a History of Utilization Data · Measuring utilization and response times at different times of the day · Measuring utilization and response times on different days over an extended period Capacity Planning · Manually graphing or using a network management tool to graph utilization as a function of time to detect trends · Preparing trend reports to document projected need for and the cost of network expansion.
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PERFORMANCE MANAGEMENT SUB-CATEGORIES AND RELATED ACTIVITIES Setting Notification Thresholds · Having a network management tool poll devices for values of critical parameters and graphing these values as a function of time · Setting polling intervals · Setting alarms/alerts on those parameters when the threshold is reached or a percentage of it is reached Building Databases · Having the network management tool create a database of records containing device name, parameter, threshold and time for off-line analysis. · Using the database to extract time dependence of utilization · Using the time dependence of parameters to decide when network upgrades will be necessary to maintain performance Running Network Simulations · Using a simulation tool to develop a model of the network · Using the model s parameters and utilization data to optimize network performance Latency · Query/Response time interval
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FAULT MANAGEMENT Fault Management Detection of a problem, fault isolation and correction to normal operation A goal is to use trend analysis to predict faults and change network conditions so that the network is always available to users Fault Management involves the following steps first determining symptoms and isolating the problem. Then the problem is fixed and the solution is tested on all-important subsystems. Finally, the detection and resolution of the problem is recorded.
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FAULT MANAGEMENT SUB-CATEGORIES AND RELATED ACTIVITIES Prioritization · Prioritize faults in the order in which they should be addressed · Use in-band management packets to learn about important faults · Identify which fault events should cause messages to be sent to the manager · Identify which devices should be polled and at what intervals · Timeliness Required · Management Station is passive and only receives event notifications · Management Station is active and polls for device variable
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  • Spring '17
  • Henry

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