AP Health SLE
SUMMARY Use the AP Health SLE to assess your users' experience with AP availability.
AP Health is one of the wireless Service-Level Expectations (SLEs) that you can track on the Monitor page of the Juniper Mist™ portal. Understand what's measured by this SLE and what issues can contribute to a low SLE.
What Does the AP Health SLE Measure?
Juniper Mist tracks the percentage of time the APs are operational without rebooting or losing connectivity to the cloud.
You don't need to set up a quality threshold for this SLE. It's assumed that you do not want any AP health issues.
Classifiers for Poor AP Health
When AP Health is poor, Juniper Mist classifies the issues as follows.
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Low Power—An AP received insufficient power from its Power over Ethernet (PoE) connection.
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AP Disconnected—One of these conditions occurred:
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Switch Down—Multiple APs that were connected to the same switch lost cloud connectivity.
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Site Down—All the APs on the site were unreachable.
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AP Unreachable—An AP lost cloud connectivity.
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AP Reboot—An AP rebooted.
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Ethernet—One of these conditions occurred:
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Speed Mismatch—Juniper Mist detected a speed or duplex mismatch between an upstream device and an AP.
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Ethernet Errors—Juniper Mist detected cyclic redundancy check (CRC) errors on the Ethernet interface of the AP.
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Example
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Success Rate—On the left, you see that the APs were available 93 percent of the time.
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Timeline—In the middle, you can drag your mouse to explore the success rate over time. In this example, there was a 91 percent success rate at the selected 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.
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Classifiers—On the right, you see a high-level root cause analysis for the user minutes that did not meet the threshold. Most of these issues (66 percent) were due to low power. Another 34 percent of the issues were due to Ethernet problems. Less than 1 percent were classified as AP Disconnected.
You can click the Values button to show numbers instead of the success rate and classifier percentages. On the left, you see the number of incidents during this time period. The timeline shows the number of incidents at each point in time. On the right, you see the number of user minutes that APs were impacted by each classifier.
