User's Manual

System Troubleshooting
BreezeNET PRO.11 Series 7-3 User’s Guide
Problem and Indication Possible Cause Corrective Action
Access Point. overlapping cells, the units may
not associate with the closest
Access Point.
a unique
ESSID to the Access Point and to all the units you want to
include in that wireless network.
Reduced performance in a multi-
AP configuration.
The APs in the same coverage
area have not been assigned
unique hopping sequences.
Assign a unique hopping sequence to each AP in the
coverage area. Each AP must have a unique hopping
sequence regardless of ESSID.
Rx / Tx calibration
error messages.
Auto Calibration is enabled for a
“DE” unit.
Disable Auto Calibration for the unit (refer to section 3.5).
8.2. Checking Counters
Checking counters is also a good way to pinpoint any problems that may
occur in the BreezeNET wireless LAN. Counters can be checked from the
monitor. See section Error! Reference source not found..
8.2.1. WLAN Counters
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) above for possible corrective
action.
8.2.2. Ethernet Counters
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.