Users Guide

Dell PowerConnect W AirWave 7.2 | User Guide Discovering, Adding, and Managing Devices | 123
Evaluating Radio Statistics for an AP
The APs/Devices > Monitor > Radio Statistics page contains useful data for pinpointing network issues at the
AP radio level for Dell APs and Cisco WLC thin APs (firmware 4.2 or greater).
To see radio statistics details, navigate to the APs/Devices > Monitoring page for a supported AP and select the
Statistics link in the Interfaces section, as illustrated in Figure 79.
Figure 79 Statistics link on APs/Devices > Monitoring for an AP
Overview of the Radio Statistics Page
The Radio Statistics page displays transmit and receive statistics about the communication quality of individual
radios. Depending on the AP, assigned group profiles, and recent activity on this radio, this data gives visibility
into recent and historical changes in the network, fetches real-time statistics from the AP’s controller, indicates
actively interfering devices (requires Dell APs set to Spectrum mode), and summarizes major issues.
Viewing Real-Time ARM Statistics
Dell AP Groups that have the Adaptive Radio Management (ARM) feature enabled continuously optimize each
AP to use the best channel and transmission power settings available. An AP configured with ARM will
automatically adjust to a better channel if it reaches a configured threshold for noise, MAC errors, or PHY errors;
additionally, it can attenuate transmit power and switch between radio modes as needed. See the ARM chapter in
the ArubaOS User Guide from support.dell.com/manuals for more information.
Complete ARM statistics from Dell controllers can be retrieved from the Radio Statistics page by selecting the
new Fetch additional radio stats button, as illustrated in Figure 80.
Figure 80 Fetch additional radio stats button
When this button is selected, a new browser window launches with the statistics in plain text. Other ARM-
tracked metrics are visible in the Radio Statistics page for Dell APs.
Issues Summary section
The Issues Summary section only displays when noise, user count, non-802.11 interfering devices, channel
utilization, bandwidth, and MAC and PHY errors reach a certain threshold of concern, as described in and
illustrated in Figure 81:
Table 78 Issues Summary labels and thresholds
Issue Triggering Threshold
High Noise > -80
High Number of Users > 15
High Channel Utilization > 75%
High Bandwidth > 75% of max
Interfering Devices Detected Detected within the last 5 minutes
High MAC/Phy Errors > 1000 frames/sec