01-17-2013 09:17 AM
I have a building p2p using 2 AP-175's in mesh mode.
It's been working great but some recent storms in the area moved the antennas a bit. I logged into the controller and found the RSSI value at 14.
(Aruba6000) #show ap mesh topology
Mesh Cluster Name: aruba-mesh
Name Mesh Role Parent Path Cost Node Cost Link Cost Hop Count RSSI Rate Tx/Rx Last Update Uplink Age #Children --------- ------ --------- --------- --------- --------- ---- ---------- ----------- ---------- ---------
Kellogg Portal to Trans Portal (N) - 3 1 0 0 0 - 41s 50d:5h:9m:52s 1
Trans Point from Kellogg Point (N) Kellogg Portal to Trans 4 0 0 1 14 24/6 36s 1h:10m:47s 0
Total APs :2 (R): Recovery AP. (N): 11N Enabled. For Portals 'Uplink Age' equals uptime.
So I have a tech out there now remounting and lining it all back up. I'm logged onto the controller looking for the RSSI to go up. The problem I'm having is that the output of show ap mesh topology doesn't exactly seem to be real time. I can see the Last Update time just keep climbing and it seems like it's just showing me old data.
Is there a way to have it update faster so I can tell my tech if he has it properly alligned?
Any help much apprieciated !!!
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01-17-2013 09:55 AM
Looks like the update time is set for 10 minutes because that is how often the "show ap mesh topology" command is updating.
If there is a better way to do this or if anyone knows how to shorten that timer please let me know.
01-18-2013 12:11 AM
Hmmm....that command updates much more often than that. I can't tell you exactly what the update interval is in the software, but I can tell you that when I configure ArubaOS mesh I am accustomed to relatively prompt changes when I do something like connect an antenna, move an antenna, etc.
It's possible that there may be more damage to the physical installation than just misaligned antennas. Any storm strong enough to move an antenna should immediately raise questions about either other damage or the quality of the original physical installation.
Another piece of evidence for this is the magnitude of the SNR drop you are reporting. 11dB is a huge number for a small misalignment. Now if you're using very high gain, narrow beamwidth antennas it's certainly possible. But suggests there is more going on that you may have detected so far.
I'd recommend that you also check all your connectors for moisture and watertightness. Make sure the antenna is right side up and that the weep holes are on the bottom and that water is not trapped inside the radome.
02-07-2013 07:07 AM
The solution was to take the AP's down, default them, reprovision them on the controller and then rehang them.
(I checked and we had the weep holes on the bottom. Honestly I never really thought about that and didn't really know if we had it right until I looked. Thanks for the reminder !!!)
02-13-2013 07:19 AM
Agree with Chuck, 11dB (unless a really long range shot) sounds like it could be more physical (incursion into a connector or antenna, large re-alignment, etc)
Also, if you want to check the RSSI/SNR more frequently, you can use the following command at the CLI:
show ap debug radio-stats ap-name <apname> radio 0 | include SNR
That will directly poll the radio at the time you run the command.
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