Dell PowerConnect W-Airwave User Manual page 203

Table 117 Users > Diagnostics Page Sections (Continued)
Section
Possible
Issues (Cont'd)
Diagnostic
Summary
Current User
Counts
Dell PowerConnect W-AirWave | User Guide
Description
Excessive roaming in last two hours—Excessive roaming means that a user's connection moves from one

AP to another 10 or more roaming instances in the past two hours. If there is excessive roaming but the
user has been stationary, then the user might be located where there is weak coverage from two
overlapping APs. Adjusting the signal strength for one of those APs may resolve the issue.
High User Bandwidth—Network performance issues might mean excessive bandwidth consumption.

Investigate user bandwidth consumption for all users on a given AP, not strictly the user who reports a
problem.
Unauthenticated User—This section conveys the user's current authentication status and the actual

authentication type. If a network deploys RADIUS, then the RADIUS server could be experiencing issues
even if a user attempts to log in with valid credentials but shows as Unauthenticated on this page.
High user load on AP/radio—This field indicates whether the number of users on a given AP has exceeded

that AP's functional capacity. Excessive users on an AP could degrade performance for all users on that
AP. Consider adding another AP in that area. Refer to the Current User Counts section on this page for
more details.
High AP radio bandwidth—This figure derives from how groups of users share radio bandwidth on a

shared AP. You may not need to add an additional AP to resolve this issue, but you would need to
determine why neighboring APs are not functioning properly.
802.11 radio parameters—These two sections indicate the likelihood that a user's issues are derived from

mismatched 802.11 deployment. That is, an 802.11ab or g user who is connected through an 802.11n radio
might not benefit from full 802.11n functionality. These two fields indicate the likelihood of such an issue
impacting a user's experience on the network, as well as a reduction of available bandwidth for other
users.
High FCS error rates—Frame Check Sequence (FCS) errors are checksum errors in the 802.11 protocol and

may indicate interference and congestion. One response is to assign a different channel to the AP
manually or by using Adaptive Radio Management (ARM).
This section summarizes bandwidth, user count, and signal quality parameters for specific windows of time.
This section is useful when diagnosis or troubleshooting follows issues that had been observed a few or
several hours prior. Figure 147
NOTE: Large negative changes in value are displayed in red.
Figure 147
Diagnostic Summary Illustration (Partial Display)
The following categories link to additional details pages:
User Bandwidth—select this link to display flash graphs for user bandwidth metrics.

Radio Bandwidth—select this link to display flash graphs for radio bandwidth consumption.

AP Bandwidth—select this link to display flash graphs for AP bandwidth consumption.

Radio User Count—select this link to display flash graphs for user count metrics.

AP User Count—select this link to display flash graphs for user count metrics.

Signal Quality—select this link to display flash graphs for signal quality.

The Current User Counts section displays user counts for APs and radios, and includes additional summary
information for APs. Figure 148
Figure 148
Users > Diagnostics > Current User Counts Illustration
Use this section in combination with the Possible Issues section.
illustrates this section.
illustrates this section:
Performing Daily Administration in AirWave | 203