WAN Application Health SLE

What Does the WAN Application Health SLE Measure?

Juniper Mist monitors the latency of WAN applications to identify applications that are performing sub-optimally. This SLE can help you to understand the end users’ experiences when accessing applications. For example, a weak network connection might give good user experiences for FTP or SMTP-based applications, but bad user experiences for VoIP applications. The Application Health SLE will help you identify which applications are giving you trouble.

For fine-tuning, you can click the Settings button to select individual applications to include or exclude.

• To remove applications from this SLE—Select the check box for each application, and then click Remove.

• To add applications to this SLE—Click Add Application, then select the check box for the application, and then click Add. Or click Create Custom to add another application.

Classifiers

When the Application 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, 100 percent of the issues are attributed to Jitter. (See the classifier descriptions below the example.)

• Jitter—Inconsistent packet transmit times can impact users' experiences with applications, especially real-time applications such as VoIP and video.

• Latency—Slow response time (lag) can impact users' experiences by, for example, causing webpages to load slowly or interrupting video and audio streams.

• Loss—Packet loss can cause application usage problems, such as bad audio or video.

• Application Services (applicable to Session Smart Routers only)—Slow responses to application requests, recurring disconnects, and insufficient bandwidth usage by applications can impact users' experiences. The Application Services classifier has three subclassifiers that help you identify these issues:

  • Slow Application

  • Application Bandwidth

  • Application Disconnects

  Here are two examples that show how Mist displays the Application Services information.

  In this example, Application Disconnects value indicates the bad user minutes caused by application disconnect events. The Disconnects value indicates the number of disconnect events observed per minute.

  

  Here is another example that shows the Slow Application value, which indicates the number of bad user minutes caused by slow applications. The RTT value shows the RTT (in seconds) associated with the slow applications.