450m CBRS AP's dropping connection multiple times a day

Products PMP
1

we have about 30 450m CBRS APs on our network that have been dropping for weeks. We see the logs at the bottom of this happen every time they drop and get HTTP 400 errors in the cbrs logs in the GUI with the same timestamps. This also happens across our entire network within seconds. I would like to note that it mentions DFS and radar events but 3.65 GHz radios should not be affected by either thing. Has anyone else seen anything like this?

11/30/2022 : 13:43:09 MST : 105466656: CBRS: cbrs_procSendToSAS: CBRS: Cleaning up stale curl connection, luid=253
11/30/2022 : 13:46:15 MST : 105485188: SYNC: DFSTxOff: Turn off transmission for ####### Frequency, Allow RF 1
11/30/2022 : 13:46:15 MST : 105485188: SYNC: dfsLogCbrsDetection: CBRS Event: Stop Transmit at frequency ####### kHz
11/30/2022 : 13:46:15 MST : 105485188: SESS: Dropped all sessions locally, due to radar event.
11/30/2022 : 13:50:25 MST : 105510246: SYNC: DFSChAvail: Channel Available for Index 0, Frequency #######
11/30/2022 : 13:50:25 MST : 105510246: SYNC: rfa00: Reset the RFSync state machine, Current State 1
11/30/2022 : 13:50:25 MST : 105510246: SYNC: hwRST: Reset FPGA hardware config
11/30/2022 : 13:50:28 MST : 105510490: SYNC: NumDataSlots: DataSlotsDwn:208 DataSlotsUp:70
11/30/2022 : 13:50:28 MST : 105510490: SYNC: SetFrameOffsetDelay: Frame Offset set from 4900000 to 4945300 ns
11/30/2022 : 13:50:29 MST : 105510596: SYNC: rfa02: Need to sync up
11/30/2022 : 13:50:29 MST : 105510596: SYNC: RegulatoryFoward: DFS not Normal Tx
11/30/2022 : 13:50:29 MST : 105510596: SYNC: DFSInit: Start DFS Initialization for Index 0

2

What firmware revision are you on? Are you close to the coast and prone to DPA events?

3

We are outside of the DPA zones in Phoenix AZ. This started 3 weeks ago and we had been running 21.1.0.1 for months prior on all affected APs without this issue. we have changed some back to 20.3.1.2, and some to 22.0 beta 3, all firmware had the issue at the same time with about 60 miles between the furthest APs. We did experience DPA-like events over a year ago and the logs are very different for those events. Those log entries mention move lists and incumbents.

4

Is it not possible that the military wasn’t running any training out there in the desert and turned on a radar system? The CBRS spectrum isn’t affected by weather radar, but Naval radars use it and some ground based satellite systems. Possibly was triggered maybe by a sattelite transmission?

5

It happened more than 60 miles apart and with a mountain range in between. We are also outside of the DPA zones as well. In the engineering.cgi portion of the system it also shows 0 radar events.

6

This topic was automatically closed 365 days after the last reply. New replies are no longer allowed.