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Service-Level Expectations Overview

Juniper Mist Routing Assurance captures, analyzes, correlates, and classifies events and performance data from the routers in the network. Using the collected data, Juniper Mist Routing Assurance provides you with an assessment of the quality of users' experiences on the network.

Many factors, such as router performance, throughput, and routing health, contribute to positive or negative user experiences. Juniper Mist Routing Assurance collects metrics for these factors and defines these metrics as service-level expectations (SLEs). SLEs contain a set of performance indicators which indicate whether the quality of a service meets the defined expectation levels of the end-user.

Network administrators can review the variations in the SLE metrics and identify potential problems in the network. In addition, you can use the SLEs to perform root cause analysis and troubleshoot issues causing service degradation.

The SLE dashboard on Juniper Mist Routing Assurance displays the real-time view of the SLE metrics. Using the SLE dashboard, you can easily identify which SLE is not performing optimally and needs immediate action to minimize impact on the user experience.

You can view SLEs from different routers at an organization level and at site-levels.

Classifiers

Each SLE monitors a set of performance indicators for every router that is connected to Juniper Mist Routing Assurance. These performance indicators are referred to as classifiers. Juniper Mist Routing Assurance attributes every poor user experience to one classifier. Packet loss, network downtime and high latency are some of the issues that contribute to poor user experience.

Analyze SLE Scores

To view the root cause analysis page, navigate to Monitor > Service Levels > Routing. Then click an SLE or a classifier.

The root cause analysis page displays the exact circumstances of failures of routers. The root cause analysis page displays additional troubleshooting details such as timeline, distribution, affected items and so on for a selected classifier.

For every SLE, you can view:

  • Service Level Score─The service level for the selected site and time period.

    • Click Success Rate to see the percentage of user experiences that met the SLE success threshold. For example, a service level of 99 percent indicates that the metric met the SLE goal 99 percent of the time and that the metric was at an average 1.0 severity.

      Note:

      The severity of an SLE metric can be in the range of 0.0 to 100.0, with 0.0 being the least severe and 100.0 being the most severe.

    • Click Values to see the average value of severity of the metric.

  • Timeline─Mouse over the timeline graph to view the user experience as a function of time. A pop-up on the slider displays the date, time interval and, the overall service level during the time period. You can drag an area of interest to zoom in to the graph.

    • Click Success Rate to see the percentage of user experiences that met the SLE success threshold at the selected point in time.

    • Click Values to see the average value of severity of the metric at the selected point in time.

  • Classifiers─Classifiers provide network administrators a high-level root cause analysis of the unsuccessful user experiences.

    • Click Success Rate to see the percentage of successful user experiences that was caused by each classifier.

      Note:

      The individual percentages of the classifiers contribute to 100 percent of the unsuccessful user experiences.

    • Click Values to see the number of minutes of unsuccessful user experiences that were caused by each classifier.

      Note:

      Together, these individual values represent the total minutes of unsuccessful user experiences.

Juniper Mist Routing Assurance monitors the following SLEs:

  • Router Health SLE─The Router Health SLE score is the percentage of time when the router health was optimal.

  • Router Throughput SLE─The Router Throughput SLE measures the percentage of time when the network throughput was optimal.

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