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WAN Edge Health SLE

SUMMARY Use the WAN Edge Health SLE to assess service levels for your WAN edge devices.

WAN Edge Health is one of the WAN Service-Level Expectations (SLEs) that you can track on the WAN SLE dashboard in the Juniper Mist™ portal. Understand what's measured by this SLE and what issues can contribute to a low SLE.

What Does the WAN Edge Health SLE Measure?

Juniper Mist monitors the user minutes when the health or performance of the WAN edge device is not optimal. Suboptimal health lowers the device's ability to pass traffic, thus directly affecting any clients connected to the device.

Juniper Mist analyzes various factors that affect WAN edge health and assigns a score. You can click the Settings button to set the success threshold.

Classifiers for Poor WAN Edge Health

When the WAN Edge Health threshold is not met, Juniper Mist classifies the issues as follows.

    • Memory—Juniper Mist triggers this classifier when the WAN edge memory utilization is above 80 percent.

    • WAN Edge Disconnected—Juniper Mist triggers this classifier when the WAN edge device disconnects from the Juniper Mist cloud.

    • Power—Juniper Mist triggers this classifier when power consumption is above 90 percent of the available power.

    • Temperature—Juniper Mist triggers this classifier when the operating temperature of the WAN edge device exceeds the prescribed threshold range, either going above the maximum limit or below the minimum requirement.

      • CPU—Juniper Mist triggers this sub-classifier when the CPU temperature exceeds the prescribed threshold range.

      • Chassis—Juniper Mist triggers this sub-classifier when the chassis temperature exceeds the prescribed threshold range.

    • CPU—Juniper Mist triggers this classifier when the CPU utilization is above 90 percent. When the CPU utilization spikes on a Juniper WAN edge device, downstream devices can lose their connectivity. Therefore, clients fail to pass traffic.

      • Data Plane—Juniper Mist triggers this sub-classifier when the Data Plane CPU utilization is above 90 percent.

      • Control Plane—Juniper Mist triggers this sub-classifier when control plane CPU utilization is above 90 percent.

Example

WAN Edge Health SLE Example

  • Success Rate—On the left, you see that the threshold was met 100 percent of the time.

  • Timeline—In the middle, you can drag your mouse to explore this SLE over time. To adjust the scope of the timeline, use the timeline drop-down list at the top of the Monitor page. For example, set the timeline to Today, Yesterday, This Week, or a custom date range.

  • Classifiers—On the right, you see the list of classifiers for this SLE. There were no issues during the selected time period, so all these percentages are blank.

Note:

If you click the Values button above the SLE blocks, you'll see numbers instead of percentages. Instead of success rate, you'll see the average severity level for the selected time period. In the Classifiers area, you see the total number of user minutes that were impacted by each classifier.