Checking Counters; Wlan Counters; Ethernet Counters - Black Box LW0050A Manual

Problem and
Indication
Unit associates
with the wrong
Access Point.
Reduced perfor- The Access Points in the Assign a unique hopping sequence to
mance in a multi- same coverage area have each Access Point in the coverage
Access Point
configuration.

7.2 Checking Counters

Checking counters is also a good way to pinpoint any problems that may occur in
the wireless LAN. Counters can be checked from the monitor. See Section 3.6.1.
7.2.1 WLAN C
OUNTERS
When checking WLAN counters, total retransmitted fragments should be below
10% of total transmitted (bridge) frames. If total retransmitted fragments are
above 10%, this indicates errors in data transmission. Too many retransmissions
may be an indication of interference between the transmitting and receiving units.
Also, the ratio between Frames Dropped (too many retries) and Total Transmitted
Frames (Bridge) should not exceed 1:40 (2.5%).
Received bad fragments should be no more than 10% of the total received data
frames. If more than 10% of the total received data frames are bad fragments, this
may indicate that there is a problem with the wireless link.
Refer to the troubleshooting guide (Section 7.1) above for possible corrective
action.
7.2.2 E C
THERNET OUNTERS
When checking the Ethernet counters, received bad frames should be zero (0). If
this is not the case, this may indicate a problem with the Ethernet connection.
Verify Ethernet port link at hub, workstation, and unit. Assign a unique IP address
to the unit and ping.
Possible Cause
In a multicell structure
with overlapping cells, the Access Point, assign a unique ESSID
units may not associate
with the closest Access
Point.
not been assigned unique area. Each Access Point must have a
hopping sequences.
CHAPTER 7: System Troubleshooting
Corrective Action
For a unit to associate with a specific
to the Access Point and to all the units
you want to include in that wireless
network.
unique hopping sequence regardless
of ESSID.
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