User's Manual

16 How To Troubleshoot Using Loupe 24
7signal Ltd, Panuntie 6, FI-00620 HELSINKI, FINLAND, [phone], [e-mail], www.7signal.com
7signal Sapphire Loupe User Guide Release 3.1
16 HOW TO TROUBLESHOOT USING LOUPE
16.1 Typical pattern
A typical troubleshooting workflow is as follows:
1. When logging in, you discover that there is an unusually large amount of failed wireless
connection availability tests (AC001).
2. Go to the SLA tab and choose the access point or network where the issue has occurred.
From the pull-down menu, choose the last 7 days as the time span and set the averaging
period to 1 hour. These settings bring out the times of the failed tests in more detail.
3. Go to the Network tab, set the time span to cover the problematic times detected in step
2, and use 1-hour averaging. Select the KPIs. The problem with the wireless connection
availability in this example is commonly caused by the following factors:
a. Increased load in the wireless network
i. TR003 (Client count per AP)
b. Changes in the interference levels
i. QURS002 (AP signal level at Eye)
ii. QURS003 (AP signal to noise ratio at Eye)
Additional factors can be:
c. Authentication or DHCP problems in a wired network
i. QURT004 (Ping RTT)
16.2 Troubleshooting: Use Cases
16.2.1 Accessibility Problem
The "AP attach success rate" presents both radio attaching and authentication success rate.
 Wireless or fixed network problem?