Cambium ePMP 2000 disables all AP clients

11122 · April 2, 2023, 6:11am

Hi all. I have a network on Cambium with several subscribers, working in TDD mode, 40 MHz. However, there are disconnections, AP suddenly disconnect all clients, then they are connected back after 10-15 seconds. What can be caused by this behavior? in eDetect silence.
AP - ePMP 2000
SM’s - Force 130/180

Log example (from AP)

Apr  2 00:32:42 CambiumBS1 kernel: [ 5967.430000] SM[00:04:56:50:f0:54] aid=1 associated with AP
Apr  2 00:55:28 CambiumBS1 kernel: [ 7334.270000] SM[00:04:56:ef:00:4f] aid=7 disassociated. Reason: COMMUNICATION LOST
Apr  2 00:55:28 CambiumBS1 kernel: [ 7334.280000] SM[00:04:56:50:f0:54] aid=1 disassociated. Reason: COMMUNICATION LOST
Apr  2 00:55:28 CambiumBS1 kernel: [ 7334.290000] SM[00:04:56:fd:8e:15] aid=2 disassociated. Reason: COMMUNICATION LOST
Apr  2 00:55:28 CambiumBS1 kernel: [ 7334.290000] SM[00:04:56:50:fc:8a] aid=5 disassociated. Reason: COMMUNICATION LOST
Apr  2 00:55:28 CambiumBS1 kernel: [ 7334.300000] SM[00:04:56:f0:53:4f] aid=4 disassociated. Reason: COMMUNICATION LOST
Apr  2 00:55:28 CambiumBS1 kernel: [ 7334.310000] SM[00:04:56:50:fc:51] aid=3 disassociated. Reason: COMMUNICATION LOST
Apr  2 00:55:28 CambiumBS1 kernel: [ 7334.320000] SM[00:04:56:e8:fe:49] aid=8 disassociated. Reason: COMMUNICATION LOST
Apr  2 00:55:32 CambiumBS1 kernel: [ 7338.070000] SM[00:04:56:50:fc:51] aid=3 associated with AP
Apr  2 00:55:32 CambiumBS1 kernel: [ 7338.080000] SM[00:04:56:50:fc:8a] aid=5 associated with AP
Apr  2 00:55:35 CambiumBS1 kernel: [ 7340.540000] SM[00:04:56:f0:53:4f] aid=4 associated with AP
Apr  2 00:55:44 CambiumBS1 kernel: [ 7350.040000] SM[00:04:56:fd:8e:15] aid=2 associated with AP
Apr  2 00:55:45 CambiumBS1 kernel: [ 7350.540000] SM[00:04:56:ef:00:4f] aid=7 associated with AP
Apr  2 00:55:51 CambiumBS1 kernel: [ 7357.040000] SM[00:04:56:e8:fe:49] aid=8 associated with AP
Apr  2 00:55:55 CambiumBS1 kernel: [ 7361.050000] SM[00:04:56:50:f0:54] aid=1 associated with AP
Apr  2 01:22:30 CambiumBS1 kernel: [ 8955.850000] SM[00:04:56:50:fc:8a] aid=5 disassociated. Reason: COMMUNICATION LOST
Apr  2 01:22:30 CambiumBS1 kernel: [ 8955.860000] SM[00:04:56:ef:00:4f] aid=7 disassociated. Reason: COMMUNICATION LOST
Apr  2 01:22:30 CambiumBS1 kernel: [ 8955.860000] SM[00:04:56:50:f0:54] aid=1 disassociated. Reason: COMMUNICATION LOST
Apr  2 01:22:30 CambiumBS1 kernel: [ 8955.870000] SM[00:04:56:50:f0:45] aid=6 disassociated. Reason: COMMUNICATION LOST
Apr  2 01:22:30 CambiumBS1 kernel: [ 8955.880000] SM[00:04:56:fd:8e:15] aid=2 disassociated. Reason: COMMUNICATION LOST
Apr  2 01:22:30 CambiumBS1 kernel: [ 8955.890000] SM[00:04:56:f0:53:4f] aid=4 disassociated. Reason: COMMUNICATION LOST
Apr  2 01:22:30 CambiumBS1 kernel: [ 8955.900000] SM[00:04:56:50:fc:51] aid=3 disassociated. Reason: COMMUNICATION LOST
Apr  2 01:22:39 CambiumBS1 kernel: [ 8964.660000] SM[00:04:56:fd:8e:15] aid=2 associated with AP
Apr  2 01:22:39 CambiumBS1 kernel: [ 8965.160000] SM[00:04:56:ef:00:4f] aid=7 associated with AP
Apr  2 01:22:40 CambiumBS1 kernel: [ 8965.680000] SM[00:04:56:50:f0:54] aid=1 associated with AP
Apr  2 01:22:43 CambiumBS1 kernel: [ 8968.670000] SM[00:04:56:f0:53:4f] aid=4 associated with AP
Apr  2 01:22:45 CambiumBS1 kernel: [ 8970.670000] SM[00:04:56:50:fc:8a] aid=5 associated with AP
Apr  2 01:22:55 CambiumBS1 kernel: [ 8980.670000] SM[00:04:56:50:fc:51] aid=3 associated with AP
Apr  2 01:23:13 CambiumBS1 kernel: [ 8999.170000] SM[00:04:56:50:f0:45] aid=6 associated with AP
Apr  2 09:20:35 CambiumBS1 kernel: [37641.100000] SM[00:04:56:f0:53:4f] aid=4 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:35 CambiumBS1 kernel: [37641.110000] SM[00:04:56:50:fc:8a] aid=5 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:35 CambiumBS1 kernel: [37641.120000] SM[00:04:56:50:f0:45] aid=6 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:35 CambiumBS1 kernel: [37641.130000] SM[00:04:56:ef:00:4f] aid=7 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:35 CambiumBS1 kernel: [37641.130000] SM[00:04:56:50:f0:54] aid=1 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:35 CambiumBS1 kernel: [37641.140000] SM[00:04:56:50:fc:51] aid=3 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:35 CambiumBS1 kernel: [37641.150000] SM[00:04:56:fd:8e:15] aid=2 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:35 CambiumBS1 kernel: [37641.160000] SM[00:04:56:e8:fe:49] aid=8 disassociated. Reason: COMMUNICATION LOST
Apr  2 09:20:47 CambiumBS1 kernel: [37652.490000] SM[00:04:56:50:fc:51] aid=3 associated with AP
Apr  2 09:20:50 CambiumBS1 kernel: [37655.970000] SM[00:04:56:50:fc:8a] aid=5 associated with AP
Apr  2 09:20:51 CambiumBS1 kernel: [37656.490000] SM[00:04:56:fd:8e:15] aid=2 associated with AP
Apr  2 09:20:57 CambiumBS1 kernel: [37662.990000] SM[00:04:56:ef:00:4f] aid=7 associated with AP
Apr  2 09:20:59 CambiumBS1 kernel: [37665.000000] SM[00:04:56:e8:fe:49] aid=8 associated with AP
Apr  2 09:21:02 CambiumBS1 kernel: [37667.500000] SM[00:04:56:50:f0:54] aid=1 associated with AP
Apr  2 09:21:03 CambiumBS1 kernel: [37668.500000] SM[00:04:56:f0:53:4f] aid=4 associated with AP
Apr  2 09:21:16 CambiumBS1 kernel: [37682.000000] SM[00:04:56:50:f0:45] aid=6 associated with AP

Eric_Ozrelic · April 2, 2023, 7:46pm

Looks like some kind of interference. Try changing channels, or channel width. Try using ACS with the longest timeouts as a kind of quick and dirty SA to find a new channel to operate on. Also, keep in mind the eDetect is almost useless as it will only show wifi interferers on the same channel and channel width as what your AP is set to. It does not show non-WiFi interferers (like PMP450) OR channels and channel widths that your AP is NOT set to… so it doesn’t scan the whole band.