epmp 2000 without smart antenna and force 200 connection issue

Products ePMP
1

Good weekend and merry Chrismas folks, I have two epmp 2000 front back and two epmp 3000 front-back inmstalled on same mast to create 360 degree coverage, all without smart antennas. There are 3 Force 200s in different places the closest one is 2.6km. Now only two of the SMs are seeing the aps, namely two of epmp2000s each facing back to back. In the closest SM I see RSSI -58 bnut somehow SM cannot associate with the ap. Will be happy if anyone can urgently help please.

Here is the log from SM:

Sep 1 00:06:49 SM-MAORE snmpd[2894]: DFS status: Channel Availability Check
Sep 1 00:07:59 SM-MAORE snmpd[2894]: DFS status: In-Service Monitoring
Sep 1 00:11:41 SM-MAORE kernel: [ 705.780000] SM disassociated from AP[00:04:56:d3:c8:72] F=5480 11naht40plus. Reason: 48 (COMMUNICATION LOST)
Sep 1 00:11:47 SM-MAORE snmpd[2894]: DFS status: Channel Availability Check
Sep 1 00:13:05 SM-MAORE snmpd[2894]: DFS status: In-Service Monitoring
Sep 1 00:14:13 SM-MAORE kernel: [ 858.740000] SM disassociated from AP[00:04:56:d3:c8:72] F=5480 11naht40plus. Reason: 52 (INAC MISS TIMEOUT)
Sep 1 00:14:26 SM-MAORE snmpd[2894]: DFS status: Channel Availability Check
Sep 1 00:15:31 SM-MAORE snmpd[2894]: DFS status: In-Service Monitoring
Sep 1 00:18:12 SM-MAORE kernel: [ 1096.010000] SM disassociated from AP[00:04:56:d3:c8:72] F=5480 11naht40plus. Reason: 48 (COMMUNICATION LOST)
Sep 1 00:18:15 SM-MAORE snmpd[2894]: DFS status: N/A
Sep 1 00:18:46 SM-MAORE snmpd[2894]: DFS status: Channel Availability Check
Sep 1 00:19:35 SM-MAORE snmpd[2894]: DFS status: In-Service Monitoring
Sep 1 00:22:16 SM-MAORE kernel: [ 1341.320000] SM cannot be associated on AP[00:04:56:d3:c8:72] F=5480 11naht40plus. Reason: 16 (INA RETRIES EXHAUSTED)
Sep 1 00:22:22 SM-MAORE snmpd[2894]: DFS status: Channel Availability Check
Sep 1 00:23:39 SM-MAORE snmpd[2894]: DFS status: In-Service Monitoring
Sep 1 00:24:49 SM-MAORE kernel: [ 1494.350000] SM associated with AP[00:04:56:d3:c8:72]
Sep 1 00:24:50 SM-MAORE snmpd[2894]: DFS status: N/A
Sep 1 00:25:04 SM-MAORE kernel: [ 1508.960000] SM disassociated from AP[00:04:56:d3:c8:72] F=5480 11naht40plus. Reason: 48 (COMMUNICATION LOST)
Sep 1 00:25:40 SM-MAORE snmpd[2894]: DFS status: Channel Availability Check
Sep 1 00:26:33 SM-MAORE snmpd[2894]: DFS status: In-Service Monitoring

2

Hi,

It looks like an interference issue.

It makes sense to look at eDetect and Spectrum Analyzer data on the SM.

Thank you.

1 Like
3

Hi Fedor,
Thanks for the reply. I have put the ap to ePtp master mode and changed the frequency, sm also on slave mode and voilà. Now there is - 53 rssi and enough throughput.
The second closest one that is 180° to the working one has rssi - 79 so I think the rest is mast height issue.
Thanks!

4
@rozimatov wrote:
Hi Fedor,
Thanks for the reply. I have put the ap to ePtp master mode and changed the frequency, sm also on slave mode and voilà. Now there is - 53 rssi and enough throughput.
The second closest one that is 180° to the working one has rssi - 79 so I think the rest is mast height issue.
Thanks!

Your devices are using DFS. Does your country require DFS operation? If there is very high interference, it might lead to false DFS detetction and eventually to stop AP transmitting. If you are under DFS operation, please make sure you have all 3 channels selected for AP operation. Also, in high interference area you should modify Subscriber Module target receive level on ePMP2000. Default value -60dBm might be not enough to guarantee enough SNR for uplink transmission. If you are not reusing the frequency on the tower/site you can increase that value even up to -40dBm if needed.