Users Guide

Figure 141:Network Deviations Threshold
How Standard Deviation is Calculated
Plot lines may or may not display outside of the shaded, standard deviation range depending on the SD value
specified from Thresholds button. Refer to the following example to review the way that standard deviation is
calculated.
Standard Deviation Example
Assumptions:
l Mean: 5
l Standard Deviation: 2
SD(1):
-------
1*SD +- Mean
1*2 +- 5
2 +- 5
Normal Range: 3 - 7
SD(2):
-------
2*SD +- Mean
2*2 +- 5
4 +- 5
Normal Range: 1 - 9
SD(3):
-------
3*SD +- Mean
3*2 +- 5
6 +- 5
Normal Range: 0 - 11 (-1 is not considered, so 0 is taken)
Given the information above, if the Average Client Count over the last 40 weeks is 5, then this is not an anomaly
(deviation) for any SD value. On the other hand, if at one point the client count was 8, then this would be an
anomaly for SD1, whose normal client range is from 3-7. The plot point would appear outside of the shaded area
when the standard deviation is set to 1, but it would be normal from a standard deviation of 2 or 3.
How to Use Search
The Search field at the top of every W-AirWave page provides a simple way to find devices, clients, groups, and
rogues. You can search for things like notes, versions, serial numbers, IP addresses (IPv4 or IPv6), and MAC
addresses.
To find something using the Search field:
1. Click .
2. In the Search field, type a keyword or the first few letters and numbers. For example, Figure 142 shows the
the search results for "00:".
Dell Networking W-AirWave 8.2.4 | User Guide Performing Daily Administration in W-AirWave | 254