Troubleshooting Guide

Index

Low Throughput

• Throughput limited to under 1 Gbps
• Throughput limited to 100 Mbps
• General low throughput

Test Failure

• The test will not start after "Start" button is pressed

Pal Association

• The Pal will not associate

Details

Low Throughput

• Throughput limited to under 1 Gbps
  When running data, the throughput never increases above about 1 Gbps. This is typically due to the fact that there is an Ethernet cable somewhere in the setup. The Ethernet link will limit the throughput to about 1 Gbps (usually, roughly, 950 Mbps.)
• Throughput limited to 100 Mbps
  Occasionally, an Ethernet interface will renegotiate down to 100 Mbps (rather than 1 Gpbs.) If you see throughput that seems stuck at 100 Mbps, look at your Ethernet adapters and make sure that they are supporting 1 Gbps. If they are not, disable/re-enable them to bring them back to 1 Gbps.
• General low throughput
  There are a number of things that can cause low throughput. Here is just a partial list of things we have seen:
  1. iPerf settings should be changed. Try looking at the iPerf settings and modifying them. Sometimes having more parallel streams will change the throughput. Try UDP instead of TCP.
  2. Packet aggregation may be failing. Especially after running at a very high attenuation between an AP and a Pal, the link may no longer be aggregating packets. This can be verified by looking at a PCAP file to see how many packets there are between Block ACKs. But to quickly test to see if this is the problem, try rebooting the Pal and testing the run again.

Test Failure

• The test will not start after "Start" button is pressed
  Make sure that the Pal is associated to the AP. Open the Pal UI and if it is not associated, configure it so that it will associate.

Pal Association

• The Pal will not associate
  
  1. Make sure that the SSID is set correctly.
  2. Make sure that the security parameters are set correctly to match what the AP is expecting.
  3. Look at the other Pal parameters and make sure that they will allow the Pal to connect. Make sure that the channel is set to either the proper channel, or is set to scan for the right channel. The safest setup will allow the Pal to adapt the channel, the bandwidth, etc.