New Member
Posts: 7
Registered: ‎09-14-2016

NanoStation loco M900 intermediate connection errors

[ Edited ]

I've got a 900Mhz Wireless Bridge that has been working great for approximately 4 months but this past week the connection drops for 2 seconds every ~4-10 minutes:

 

Receive:

Jan 20 19:08:38 wireless: ath0     Sending deauth to 24:a4:3c:xx:xx:xx. Reason: Disassociated because sending STA is leaving (or has left) BSS (8).
Jan 20 19:08:38 wireless: ath0     New Access Point/Cell address:Not-Associated
Jan 20 19:08:40 wireless: ath0     Set Mode:Managed
Jan 20 19:08:40 wireless: ath0     Set Frequency:914 MHz (Channel 35)
Jan 20 19:08:40 wireless: ath0     New Access Point/Cell address:24:A4:3C:xx:xx:xx
Jan 20 19:08:40 init: process '/sbin/ntpclient -n -s -c 0 -l -h 0.ubnt.pool.ntp.org' (pid 1259) exited. Scheduling for restart.
Jan 20 19:08:40 init: Run: /sbin/ntpclient -n -s -c 0 -l -h 0.ubnt.pool.ntp.org
Jan 20 19:08:40 init: starting pid 1287, tty '/dev/null': '/sbin/ntpclient -n -s -c 0 -l -h 0.ubnt.pool.ntp.org'
Jan 20 19:12:05 wireless: ath0     Sending deauth to 24:a4:3c:xx:xx:xx. Reason: Disassociated because sending STA is leaving (or has left) BSS (8).
Jan 20 19:12:05 wireless: ath0     New Access Point/Cell address:Not-Associated
Jan 20 19:12:10 wireless: ath0     Set Mode:Managed
Jan 20 19:12:10 wireless: ath0     Set Frequency:914 MHz (Channel 35)
Jan 20 19:12:10 wireless: ath0     New Access Point/Cell address:24:A4:3C:xx:xx:xx
Jan 20 19:12:10 init: process '/sbin/ntpclient -n -s -c 0 -l -h 0.ubnt.pool.ntp.org' (pid 1287) exited. Scheduling for restart.
Jan 20 19:12:10 init: Run: /sbin/ntpclient -n -s -c 0 -l -h 0.ubnt.pool.ntp.org
Jan 20 19:12:10 init: starting pid 1409, tty '/dev/null': '/sbin/ntpclient -n -s -c 0 -l -h 0.ubnt.pool.ntp.org'
Jan 20 19:23:53 wireless: ath0     Sending deauth to 24:a4:3c:xx:xx:xx. Reason: Disassociated because sending STA is leaving (or has left) BSS (8).
Jan 20 19:23:53 wireless: ath0     New Access Point/Cell address:Not-Associated
Jan 20 19:23:55 wireless: ath0     Set Mode:Managed
Jan 20 19:23:55 wireless: ath0     Set Frequency:914 MHz (Channel 35)
Jan 20 19:23:55 wireless: ath0     New Access Point/Cell address:24:A4:3C:xx:xx:xx

 

 

Send:

Jan 20 19:08:40 hostapd: ath0: STA 68:72:51:xx:xx:xx IEEE 802.11: associated
Jan 20 19:08:40 wireless: ath0 Registered node:68:72:51:xx:xx:xx
Jan 20 19:08:40 hostapd: ath0: STA 68:72:51:xx:xx:xx WPA: pairwise key handshake completed (RSN)
Jan 20 19:12:10 hostapd: ath0: STA 68:72:51:xx:xx:xx IEEE 802.11: associated
Jan 20 19:12:10 wireless: ath0 Registered node:68:72:51:xx:xx:xx
Jan 20 19:12:10 hostapd: ath0: STA 68:72:51:xx:xx:xx WPA: pairwise key handshake completed (RSN)
Jan 20 19:23:53 hostapd: ath0: STA 68:72:51:xx:xx:xx IEEE 802.11: disassociated
Jan 20 19:23:53 wireless: ath0 Received deauth from 68:72:51:xx:xx:xx. Reason: Disassociated because sending STA is leaving (or has left) BSS (8).
Jan 20 19:23:53 wireless: ath0 STA-TRAFFIC-STAT mac=68:72:51:xx:xx:xx rx_packets=5892 rx_bytes=2613971 tx_packets=4763 tx_bytes=1774676
Jan 20 19:23:53 wireless: ath0 Expired node:68:72:51:xx:xx:xx
Jan 20 19:23:55 hostapd: ath0: STA 68:72:51:xx:xx:xx IEEE 802.11: associated
Jan 20 19:23:55 wireless: ath0 Registered node:68:72:51:xx:xx:xx
Jan 20 19:23:55 hostapd: ath0: STA 68:72:51:xx:xx:xx WPA: pairwise key handshake completed (RSN)

 

Looking AirView channels look clear. 

 

I've upgraded the firmware to 6.1.9

 

Any Ideas where to start troubleshooting?

 

Attached are screenshots of when the signal is strong and when it drops momentarily. 

 

bad signal.png
good- signal.png
Ubiquiti Employee
Posts: 11,657
Registered: ‎04-14-2017
Kudos: 2169
Solutions: 335

Re: NanoStation loco M900 intermediate connection errors

This is usually due to sporadic interference. Can you post the scan?
New Member
Posts: 7
Registered: ‎09-14-2016

Re: NanoStation loco M900 intermediate connection errors

I'll  complete/post a scan tomorrow night when I am on site. 

 

Any time if we do detect sporadic noise how to pinpoint the source and/or mitigate against it?

 

Strange that noise would be only on for 2 seconds at random intervals - does any have ideas what the possible source could be?

 

Thanks,

Nathan

Ubiquiti Employee
Posts: 11,657
Registered: ‎04-14-2017
Kudos: 2169
Solutions: 335

Re: NanoStation loco M900 intermediate connection errors

It's often difficult to pin down an interference source, especially remotely. You may be able to pinpoint it by looking around your sites and running scans from multiple devices.
New Member
Posts: 7
Registered: ‎09-14-2016

Re: NanoStation loco M900 intermediate connection errors

2019-01-23 00_48_40-AirView Spectrum Analyzer.png20 minute AirView Scan

Highlighted
Ubiquiti Employee
Posts: 11,657
Registered: ‎04-14-2017
Kudos: 2169
Solutions: 335

Re: NanoStation loco M900 intermediate connection errors

In the waterfall it looks like there are a few spots of high interference on 914 MHz. From this it's hard to say whether those are your issue though.