we just installed 2 links both seem to be exhibiting same thing both have 35+ SNR on both paths, both show 8x8x and both links test at 105mbps / 20mbps 80% split
But when we do throughput tests (iperf or speedtest.net) we're only able to push ~60-70mbps/15-20mbps...
Is this normal something seems... odd.
What SM's are you using (450's or 450i's), and are you using NAT? If you take the two test computers, and use an ethernet cable between them, what are the transfer rates?
450 no NAT, its a routed IP, PC's have tested well over 500mbit perfore in the office so don't think thats the issue
On iperf, how many threads/connections were you using and were you testing with TCP or UDP, also what packet size?
Would need to check with the onsite engineer, but normally on our old PTP 500-600's we didn't have issues matching the advertised specs..
I noticed this morning when i came in the downlink was showing as odd especially a link <200m
Stats for LUID: 2 Test Duration: 2 Pkt Length: 1714 Test Direction Bi-Directional
Link Test with Bridging
VC Downlink Uplink Aggregate Packet Transmit Packet Receive Actual Actual
| 18 | 61.09 Mbps | 30.05 Mbps | 91.14 Mbps, 6554 pps | 8825 (4412 pps) | 4284(2142 pps) |
Efficiency
Downlink Uplink Efficiency Fragments
count Signal to
Noise Ratio Efficiency Fragments
count Signal to
Noise Ratio Actual Expected Actual Expected
| 100% | 238648 | 238648 | 0 dB V 43 dB H |
99% | 118104 | 117396 | 41 dB V 38 dB H |
Link Quality
Downlink
RF Path Modulation Fragments Modulation
Percentage Average Corrected
Bit Errors
| V | QPSK | 59724 | 25% | 0.059 |
| V | 16-QAM | 59724 | 25% | 0.067 |
| V | 64-QAM | 59724 | 25% | 0.077 |
| V | 256-QAM | 59724 | 25% | 0.065 |
Uplink
RF Path Modulation Fragments Modulation
Percentage Average Corrected
Bit Errors
| V | QPSK | 14269 | 25% | 1.015 |
| V | 16-QAM | 14225 | 25% | 1.120 |
| V | 64-QAM | 14171 | 25% | 1.189 |
| V | 256-QAM | 14185 | 25% | 1.125 |
| H | QPSK | 14705 | 25% | 0.307 |
| H | 16-QAM | 14705 | 25% | 0.518 |
| H | 64-QAM | 14704 | 25% | 0.837 |
| H | 256-QAM | 14704 | 25% | 0.295 |
Link Test ran on 17:49:01 01/04/2011 UTC
Currently transmitting at:
| VC 18 Rate 8X/4X MIMO-A |
Hi Chris,
Did you try to change the value of "SM Receive Target Level" configuration parameter on the AP.
Try to change it to (61-) and test again.
I know i see that on the PTMP radios but on the PTP i don't have that parameter to set in the radio page :S
OK , you have to decrease the Tx power at both sides as the link distance is too short.