User's Manual

Troubleshooting
8.8 Wireless Interface Validation
Problem Solution
Wireless Interface Run iperf commands (You can run Embedded iperf commands only through Telnet.)
Validation
• iperf -s -w 202k (command for iperf server)
• Iperf -c ipaddress -w 202k -t time Period -I <intermediateResultInterval> -P <4 or
6> (command to run iperf client)
- Ipaddress -> of the SU/End Point B or BSU/End Point A device where the iperf
server is running
- P -> No of pairs (Streams)
• Use -d option to run bidirectional throughput
• Use -r option to run unidirectional throughput one after another without changing
the server and SU ends
If the expected throughput is not achieved, then check the following:
• Antenna Alignment
- Note whether the antenna ports are balanced - SNR/RSSI provided for Local
and Remote in the BSU/SU Link Statistics page or by using “aad” command
- Signal difference of <=5 dBm is considered as balanced and recommended
- If the chains are not balanced, then look at the alignment and connectors of
RF cables, used between antenna and device
- If in RMA (Returned from Customer), check the RF cable to radio port
connectivity
- Avoid nearby metal surfaces, if you are using Omni antenna
• Data Streams
- Select “Single” stream instead of “Dual” stream mode
- DDRS - with single stream data rate or with Auto mode
Dual stream data rates can be used only when the signal in both antenna ports is
balanced
• Antenna Port Selection
- For MP81x0-BSU/SU or QB81x0 devices, make sure you are either enabling all
antenna ports for 3*3 MIMO or using A1 and A3 antenna ports for 2*2
MIMO mode
- For MP8160-BSU/SU use A1 and A2 antenna ports for 2*2 MIMO
- For using single stream, it is mandatory to select antenna port A1
- Enabling all antenna port will not cause any issue even if it is not in use.
• Bad Channel
- Check for CRC errors, PHY errors, WORP Retries and WORP Failures in
Monitor Interface Statistics page. If this count increments steadily (Refreshing the
web page is required) then
• Either change the channel and check for a better channel
• Use Wi-Spy or similar tool and check the environment for better channel
• Data Rate Issues
- Ensure same data rates are selected if you are using fixed data rate between
BSU/SU and End Point A/End Point B to have predictable throughput and link
- Alternative, use DDRS with Auto mode enabled
Tsunami® 8100 Series - Software Management Guide 212