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Wireless Throughput SLE

SUMMARY Use the Throughput SLE to assess users' experiences with throughput on your wireless network.

Throughput is one of the wireless Service-Level Expectations (SLEs) that you can track on the Wireless SLEs dashboard.

Throughput Example
Note:

To find the Wireless SLEs dashboard, select Monitor > Service Levels from the left menu of the Juniper Mist™ portal, and then select the Wireless button.

What Does the Wireless Throughput SLE Measure?

Juniper Mist calculates the estimated throughput on a per-client basis for the entire site. This calculation is done for every client every minute. The estimator considers effects such as AP bandwidth, load, interference events, the type of wireless device, signal strength, and wired bandwidth, to arrive at the probabilistic throughput.

You can click the Settings button to set the success threshold for this SLE.

Setting the SLE Threshold for Wireless Throughput

Classifiers

When the throughput threshold is not met, Juniper Mist sorts the issues into classifiers. The classifiers appear on the right side of the SLE block. In this example, less than 1 percent of the issues were attributed to Coverage, and more than 99 percent were due to Capacity. (See the classifier descriptions below the example.)

Throughput Example

  • Network Issues—Low throughput is primarily due to the capacity of the wired network.

  • Coverage—Low throughput is primarily due to the client’s weak signal strength.

  • Device Capability—Low throughput is primarily due to issues with the device capability. For example, throughput issues can occur if a device only supports 20 MHz wide channels, one spatial stream, or a lower version of Wi-Fi (802.11 g/802.11 n).

  • Capacity—Low throughput is due either to the load on the AP or interference on the channel.

    The capacity classifier has four sub-classifiers:

    • High Bandwidth Utilization

    • Non Wi-Fi Interference

    • Excessive Client Load

    • Wi-Fi Interference

    You can use these sub-classifiers to analyze users and APs below the SLE goal, the timeline of failures and system changes, and the distribution of failures. You can also analyze related network processes that these sub-classifiers can influence.