5.7GHz MIMO OFDM - Backhaul - Timing Master - 0a-00-3e-b3-da-9e
Board Type :
P11C120
Software Version :
CANOPY 13.4 BHUL450-DES
Board MSN :
6069RU086V
FPGA Version :
040715
Uptime :
23:35:22
System Time :
13:20:59 02/16/2016 MST
Ethernet Interface :
100Base-TX Full Duplex
Regional Code :
United States
Regulatory :
Passed
Antenna Type :
Integrated
Channel Frequency :
5740.0 MHz
Channel Bandwidth :
20.0 MHz
Cyclic Prefix :
1/16
Frame Period :
2.5 ms
Color Code :
****
Transmit Power :
17 dBm
Temperature :
40 °C / 104 °F
we are seeing this link re-range up to 5 times a day. I turned down the power by 4 db a few days ago thinking it might be too hot, but that just seemed to reduce us from 8/8 to 8/6.
MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/16/2016 : 13:21:19 MST : Status : 3 Flag : 1728840 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/16/2016 : 08:37:39 MST : Status : 3 Flag : 1728840 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/16/2016 : 06:02:58 MST : Status : 3 Flag : 1728790 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/15/2016 : 20:25:24 MST : Status : 3 Flag : 1728790 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/15/2016 : 15:35:24 MST : Status : 3 Flag : 1728790 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/15/2016 : 13:46:36 MST : Status : 3 Flag : 1728790
What causes this issue and how can we mitigate it? the outages last upwards of 1 minute each.
MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/16/2016 : 13:21:19 MST : Status : 3 Flag : 1728840 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/16/2016 : 08:37:39 MST : Status : 3 Flag : 1728840 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/16/2016 : 06:02:58 MST : Status : 3 Flag : 1728790 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/15/2016 : 20:25:24 MST : Status : 3 Flag : 1728790 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/15/2016 : 15:35:24 MST : Status : 3 Flag : 1728790 MAC : 0a-00-3e-b3-d7-3e BH ReRange 02/15/2016 : 13:46:36 MST : Status : 3 Flag : 1728790
Sam,
The BH ReRange is the normal process for the BH registration process. The BHM starts with an initial small frame and waits until the BHS first attempts to register. Then the BHM detects the distance of the BHS, and fails its registration telling the BHS to ReRange. The BHM configures a new frame with the exact distance of the BHS so that no airtime is wasted.
All that to say is that ReRange is not the cause of your problem, but just a symptom of your link going down and coming back up. The question is why is it losing its link the first place. Is the BHS resetting? VC error? We will need more information to try and figure out why it is dropping.
You do not have to turn the Tx power down on Backhauls, so that can be turned back up to get your 8X back.
Would you be willing to try the latest release for PTP 450 14.1.1 or even the 14.1.2 beta? That would be helpful to see if you are still seeing the problem.
Hi, the radios are not powering off randomly, the event logs only show time set and a lot of them. SNR is above 33.
What can I send your way for evaluation? Should I open a ticket?
Sam
Sam,
Would you be willing to try the latest release for PTP 450 14.1.1 or even the 14.1.2 beta? That would be helpful to see if you are still seeing the problem.
Thanks for the suggestions, but I think I've solved the problem.
I discovered that the link was very sensitive to alignment, and although the RF stats in the alignment tool didn't seem to show it. After adjusting the BHM alignment one evening, Ihad 83 re-range occur overnight.. After returning to the original alignment, I was back to just periodic drops. I then trimmed some vegetation that was fairly close to the BHM, but not directly in the path. Since then, the link has been up continuously.