Application Guide

4 Summary 8
7signal Ltd, Panuntie 6, FI-00620 HELSINKI, FINLAND, [phone], [e-mail], www.7signal.com
7signal Sapphire Loupe User Guide Release 3.0
4 SUMMARY
SLA Compliance KPI
To summarize the health of the network element, Loupe analyses multiple KPIs and based on
that computes one single value that is called the ‘SLA Compliance KPI’. The network element
may be either an access point or a link. There has to be a SLA group defined and bound to the
network element.
The measurement value averages all the KPIs in the SLA group. As such, this KPI does not
provide any tools for analysis but it is rather to point out the need for analysis for the network
elements that do not fulfill the quality expectations.
In the picture below, there are threenetwork elements, AP-10, AP-15 and AP-35. Based on the
chart one can assume that AP-15 is operating as expected with only one temporary quirk. On
the other hand, AP-35 seems to be continuously doing below any expectation. Note that AP-35
might be completely out or it may serve wlan clients but the overall quality is next to nothing,
the SLA compliance is non-existent. AP-10 has its moments but obviously it is
underperforming.
While all elements would benefit from some attention, it is obvious that AP-35 should have
the priority. This is elementary to the SLA compliance KPI: one glimpse tells whether some
element needs attention or not. The nature of the problem is available through investigating
lower-level KPIs.
The SLA group defines the threshold values for all individual KPIs. However, the resultant KPI
threshold values may and should be set in Loupe. The value setting is stored between the
sessions for each user.
Export for the charts is available both for each chart individually and the global export on the
top-menu buttons.