Concept Guide

292 | Services Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide
Inline Monitoring
This functionality of Clarity Live helps diagnose client connectivity issues. It provides the network administrator
or engineers with more information regarding the exact stage at which the client connectivity fails or provides
data where the dhcp or radius server is slow.
The W-IAP collects all information related to user transitions like association, authentication, and dhcp. Then,
the W-IAP sends these records to a management server like W-AirWave. The management server analyzes the
data and concludes which dhcp or radius server was not working efficiently causing user connectivity issues.
This enhancement allows the management server to isolate WLAN issues caused by external servers such as
dhcp or radius.
HTTPS is the data transport protocol used to communicate basic statistics or state changes to W-AirWave.
Inline Monitoring makes use of HTTPS to send the statistics to W-AirWave too.
The following events are used by W-IAP to send inline monitoring (Clarity Live) updates to W-AirWave:
l Authentication Failure Events—The statistics or updates shared as part of this event are related to the
management frame. These frames are processed by STMand are collected in the user space.
l DHCP Failure Events—In scenarios where the DHCPServer does not respond, information about the failure
of the event can be collected by the W-IAP with the help of Clarity Live and sent to W-AirWave. This
functionality receives client DHCPtransactions from the control plane.
l DNSFailure Events—The W-IAP measures the responsiveness of each DNSserver with the help of Clarity
Live. The monitoring includes minimum, maximum, and average response time of each DNSserver. A
maximum of 16 DNSservers can be monitored at a time and a maximum of 16 DNSserver entries are
made in the DNStable. If there are no queries from a particular DNSserver for a long period of time, the
DNSserver entry can be removed and replaced with a new DNSserver entry. The statistical data collected
for the DNSserver will be pushed to W-AirWave before the entry is replaced by a new DNSentry.
l STAFailure Events—The station passive monitor statistic is generated when enabled on the W-IAP. The W-
IAP generate the data periodically for every 60 seconds and sends it to W-AirWave.
All of the above clarity configurations must be enabled or disabled at the same time whether if it is by the
Instant UIor the CLI. W-AirWave will drop the message even if one of the four stats is disabled.
You can configure a W-IAP to generate inline monitoring statistics by using the Instant UI or the CLI.
In the Instant UI
To enable Clarity Live for generating inline monitoring statistics:
1. Click More > Services.
2. Click Clarity. The configuration options for the Clarity group are displayed.
3. Select the Inline Auth stats checkbox to enable the W-IAP to generate statistics and update messages for
Authentication Failure Events.
4. Select the Inline DHCP stats checkbox to enable the W-IAP to generate statistics and update messages for
DHCP Failure Events.
5. Select the Inline DNS stats checkbox to enable the W-IAP to generate statistics and update messages for
DNS Failure Events.
6. Select the Inline STA stats checkbox to enable the W-IAP to generate statistics and update messages for
STA Failure Events.
7. Click OK.
In the Instant CLI
To configure inline monitoring statistics using the CLI: