WiFi monitoring is fully integrated with all aspects of Highlight. This page explains our WiFi metrics then how they are used to colour heat tiles and generate email alerts; how they are graphed on the Details page and how they feed into Reporting.
Every five minutes Highlight collects the following information if available from the vendor:
|WAP Traffic In/Out||Total volume of Wireless traffic flowing in and out of the Wireless Access Point (WAP)|
|WAP Utilisation||The percentage utilisation of the two radio channels, 2.4GHz and 5GHz, on that WAP.|
|WAP Status||Whether a WAP is up or down. This considers (a) connectivity to the WAP is up and running, and (b) each radio on the WAP is up and working. If any of these report down from an operational perspective, Highlight reports a problem with the WAP. 'Administrative' down status (where the WAP or an interface has been deliberately shut down by the administrator) will not show as an outage or trigger an alert. Highlight also detects reboots of the WAP and shows them as events / blips.|
|Client Count||The number of client devices connected to the WAP|
|Congestion||Highlight derives a metric to indicate congestion level on the WAP radio networks. For consistency with other types of link, the metric used is the percentage of send attempts that require retransmissions. Since a certain level of retries is entirely normal, Highlight looks for retry levels above a certain threshold which Admin users can configure to avoid spurious alerts. Congestion is not calculated unless traffic volumes are more than 1 frame per second. This information is not returned for Aerohive devices.|
|Signal Problems||Highlight gives an indicative picture of how well clients are connecting by monitoring the percentage of connected client devices which are reporting poor signal strength (poor signal means SNR (Signal-to-Noise Ratio) of 1 or 2 bars (under 20 decibels).|
|WAP CPU Load||The CPU Utilisation / Load on that WAP, as a percentage. This information may not be available for Cisco devices.|
- Makes all the above information available through the Details page for individual WAPs, drawing graphics for traffic load (utilisation), client device count, congestion and signal (on the Access Point Health chart)
- Feeds this information through the alerting engine to generate alerts when any metric goes outside the prescribed limits (which can be set at a folder or location level)
- Shows the status of WAPs via heat tiles on the Status Heat Tiles page (Access Points will show under location tiles and can be associated to service tiles also)
- Shows this information in strip charts on both the Status Heat Tiles and Reporting pages
- Summarises this information in Reporting
Wireless Access Points (WAPs) can be associated with service tiles. They will impact location tiles and show as strip charts under the parent controller.
On the right of each strip chart, click to jump to the Details page for that controller or AP
Find out more about WAP strip charts
Highlight refreshes the list of WAPs every 20 minutes for Cisco and Aruba and every 15 minutes for Aerohive. Descriptive information (configured into the WAP by the Wireless LAN administrator) is collected by Highlight for each WAP on WAP discovery and then updated approximately every four hours:
|SSIDs set on the WAP||BYOD, Guest-AA|
This information is used to title the Details page for individual WAPs and is available in the Reporting area, enabling users to list all their WAPs with serial numbers, locations etc.
Summarised / Reporting information
Highlight provides WiFi summary reporting. A number of new columns are available for inclusion in reports and new graphics can be included with these:
|Number of Clients : Peak, Average||The Peak and Average number of connected clients for the selected period (day, week or month).|
|Radio Utilisation : Peak, Average||Peak and Average utilisation of the two radio networks. Use this as an indicator of how busy, overall, the shared radio channels are. As utilisation grows, you will start to see congestion.|
|Volume||Volume of traffic in and out of the WAP. Use this to see how traffic volumes are changing on individual APs, and across your wireless network. You'll be able to graph this to see trends.|
|Congestion||Level of congestion as percentage retries. List this across the WiFi network to see areas where usage is getting too high|
|Signal Problems||The percentage of client connections suffering from a poor quality signal. There is no relationship to the threshold in this column, see exceptions instead. List this metric across the radio network to find trouble spots.|
An explanation of the fields available for WiFi reporting is available. In addition, there's the usual metrics for a link such as Outages, Availability, Exceptions, Issues Scores. Find out more about client count charts in reports.
The following wireless devices are supported:
- Aerohive (HiveManager NG Public Cloud)
Other vendors may be added as demand and requirements emerge, taking into account feedback from users and results of more technical research.
Each manufacturer provides different metrics for monitoring WiFi performance. The text "not returned" is used when the device does not provide a metric.