400c PTP "AP Keep Alive RX Stuck"

Products ePMP
1

Is anyone experiencing “AP Keep Alive RX Struck” on 400c in a eptp setup? I am experiencing this randomly and I cant see it being interference, in the country/rural ptp link. Running 5.10.1,. here is the ealign tab of the AP of the ptp

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2

Hi @DigitalMan2020,

To my knowledge, there have been no reported false Keep Alive Rx Stuck events in firmware versions 5.10.x or 5.11.0.

Could you please post the following:
• A screenshot of your Spectrum Analyzer running for 15 min
• Your MCS distribution from Performance page

Additionally, could you confirm whether you are observing any MCS drops in the statistics after 24 hours or more of operation?

3

Hate to say it as love my cambium-based wisp network, but thats the msg you get when links drop for no reason. I have zero interference, as my wisp is the only noise around for miles, but my ax cambium gear has always suffered from random disconnects. I ended up replacing two F400 backhauls for Racom links ($!!!) because of this. Some firmwares could run for a few weeks, but will always eventually drop. I use F400c as failover link for my Siklu 70/80ghz backhaul, and even running the latest fw they will always eventually drop. If you edit the frequency list on the sm, it will reestablish quickly, but ive had the F400 since they were first available and they always drop before two months.

PtP TDD 80mhz bridge mode is my setup.

*correction - its no longer the rx stuck message. Its simply a disconnect message. The only rx stuck messages i see now is a f300 with a weak signal dropping (from e3k) in heavy downpours (via a tree).

4

@aka this is my scenario as well…..

@riddle I really appreciate your response, my setup is same, rural, only noise and bridge mode. Sucks this is something that has not been fixed.

5

We have experienced this occasionally on PTP links and just had it happen this morning on a F400 link that does it about once every two to three weeks or so, feeding a mini pop. The PTP master is on a tower with some interference and the uplink modulation reflects that. There is also some fresnel interference due to tree tops. The 4500 replaced an old Ubuiti AF2X that could barely get 80 meg. Going to try downgrade it to 5.9.2 from 5.11 as we have many PTP links both 4500 and 4600 that have been running on that for a year with no issues . We also have running on 5.11 that have not had any issue so far. I would be interested in exactly kicks off this error.