We have a Force180 AP running TDD dropping both connected Force180 SMs every 20 minutes with “All STAs disassociated. IEEE80211_REASON_TDD_STOP (20)” in the syslog. We are currently running 4.8.1 firmware on these radios, have tried 4.6.1 but seeing the same results on that firmware. No sync on any of the radios. Not seeing any interference via spectrum analyzer, signals are good with full MCS levels. All devices have been rebooted. We replaced the AP last month due to the same issue but that did not correct the issue; have not yet replaced the POE for the AP but will be trying that next. Anywhere else we can look? Thanks for any assistance!
We had the same problem a few years ago after 41 minutes as far as I remember. On the neighboring roof and the neighboring channel was a Cambium Canopy AP. We changed the frequency of one of the two and the problem went away. Is your working frequency in the DFS range?
Some kind of radar could also be the problem.
Regards
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We are not using DFS channels for this link. I ran spectrum from the AP a few weeks ago and saw no interference at that time. Ran it again today and the noise floor is a -93 for the upper band where we are running, so this does not appear to be interference. We will be replacing the POE next week and verifying cabling.
We found a damaged cable end feeding the radio but the issue persisted after that. Replaced the POE and moved to a different channel in the lower band but the issue persisted after that. Replaced the PTP AP and the client radios have maintained connection for almost an hour.
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