WESM zl Management and Configuration Guide WT.01.28 and greater

12-14
Wireless Network Management
Monitoring the Wireless Network
The Station Properties section displays the same information that is listed on the
Device Information > Wireless Stations screen, including the station’s MAC and IP
address. However, you can also see whether the station supports QoS capabilities
such as Voice and WMM.
You can use the Traffic section to monitor the quality and performance of the
connection. The Web browser interface reports speed in terms of packets per second,
total throughput in Mbps, and average speed in Mbps. The Web browser interface
further breaks down statistics into received and transmitted traffic.
Note that these statistics do not include retry overhead, which means that in a network
with significant congestion or interference, a user might perceive the connection to
be slower than these statistics would seem to indicate. The sections below can help
you monitor that aspect of the wireless connection.
The RF Status section displays the status of the radio medium:
■ Avg Station Signal (dBm)—average signal level detected for this station
■ Avg Station Noise (dBm)—average background noise for this station
■ Avg Station SNR (dBm)—average SNR for this station
In the Errors section, the Web browser interface reports the total number of error
packets:
■ Avg Number of Retries—average number of retries necessary to successfully
transmit a packet to this station
A high value (over 10 or 20 percent) may indicate excessive congestion or
interference from another wireless device.
■ % Gave Up Pkts—number of packets that the Wireless Edge Services zl Module
never successfully transmitted to this station
■ % of Undecipherable Pkts—percentage of packets received from this station that
could not be deciphered
A high percentage might indicate that someone is attempting to guess a static
WEP key or WPA/WPA2 PSK.
The statistics in black apply to the last 30 seconds, giving you a snapshot of current
performance. The statistics in blue show the station’s average performance over the
last hour.
Viewing a Graph of Wireless Station Statistics
The Wireless Edge Services zl Module can create a graph of statistics for a wireless
station. This graph displays how the statistics change over time.
To view this graph, follow these steps: