Wireless constantly disconnecting, reconnecting

RouterOS Beginner Basics
1

For the past several months, I’ve been watching my logs and see a repeated pattern of issues every 5-10 minutes or so.

Has anybody seen anything like this before?

This is an example of the errors:

Aug/05/2015 12:34:26 dhcp,info Guest WiFi assigned 10.0.0.10 to 48:43:7C:BE:83:AA
Aug/05/2015 12:35:47 dhcp,info Guest WiFi deassigned 10.0.0.10 from 48:43:7C:BE:83:AA
Aug/05/2015 12:39:49 wireless,info 10:A5:D0:FC:EE:A3@Shelf Guests: connected
Aug/05/2015 12:39:49 wireless,info 10:A5:D0:FC:EE:A3@Shelf Guests: reassociating
Aug/05/2015 12:39:49 wireless,info 10:A5:D0:FC:EE:A3@Shelf Guests: disconnected, ok
Aug/05/2015 12:39:49 wireless,info 10:A5:D0:FC:EE:A3@Shelf Guests: connected

Aug/05/2015 12:27:13 dhcp,info Guest WiFi deassigned 10.0.0.104 from DC:37:14:EA:A8:2F
Aug/05/2015 12:27:21 wireless,info D4:8F:33:E6:70:EB@Shelf Guests: disconnected, extensive data loss
Aug/05/2015 12:27:21 dhcp,info Guest WiFi deassigned 10.0.0.122 from 48:43:7C:BE:83:AA
Aug/05/2015 12:27:27 wireless,info 70:11:24:EF:FE:34@Shelf Guests: disconnected, extensive data loss
Aug/05/2015 12:27:45 dhcp,info Guest WiFi deassigned 10.0.0.121 from 64:6C:B2:80:86:99
Aug/05/2015 12:27:45 dhcp,info Guest WiFi assigned 10.0.0.121 to 64:6C:B2:80:86:99
Aug/05/2015 12:28:29 dhcp,info Guest WiFi assigned 10.0.0.122 to 48:43:7C:BE:83:AA
Aug/05/2015 12:28:32 wireless,info 34:4D:F7:86:3E:C2@Shelf Guests: connected
Aug/05/2015 12:28:35 wireless,info 34:4D:F7:86:3E:C2@Shelf Guests: disconnected, extensive data loss
Aug/05/2015 12:28:38 wireless,info Shelf Guests: data from unknown device 34:4D:F7:86:3E:C2, sent deauth
Aug/05/2015 12:28:38 wireless,info Shelf Guests: data from unknown device 34:4D:F7:86:3E:C2, sent deauth
Aug/05/2015 12:29:49 wireless,info AC:FD:CE:13:45:6B@Shelf Guests: connected
Aug/05/2015 12:29:49 dhcp,info Guest WiFi deassigned 10.0.0.122 from 48:43:7C:BE:83:AA
Aug/05/2015 12:29:52 dhcp,info Guest WiFi deassigned 10.0.0.139 from D4:8F:33:E6:70:EB
Aug/05/2015 12:29:52 dhcp,info Guest WiFi assigned 10.0.0.139 to D4:8F:33:E6:70:EB
Aug/05/2015 12:30:04 wireless,info 34:4D:F7:38:2A:62@Shelf Guests: connected
Aug/05/2015 12:30:20 dhcp,info Guest WiFi assigned 10.0.0.119 to 84:8E:0C:3A:6D:B7
Aug/05/2015 12:30:43 dhcp,info Guest WiFi assigned 10.0.0.122 to 48:43:7C:BE:83:AA
Aug/05/2015 12:30:44 dhcp,info Guest WiFi deassigned 10.0.0.122 from 48:43:7C:BE:83:AA
Aug/05/2015 12:30:45 wireless,info 34:4D:F7:38:2A:62@Shelf Guests: disconnected, extensive data loss
Aug/05/2015 12:31:07 dhcp,info Guest WiFi assigned 10.0.0.132 to B4:CE:F6:65:FE:F3
Aug/05/2015 12:31:33 wireless,info AC:FD:CE:13:45:6B@Shelf Guests: disconnected, extensive data loss
Aug/05/2015 12:32:18 dhcp,info Guest WiFi assigned 10.0.0.104 to DC:37:14:EA:A8:2F
Aug/05/2015 12:32:19 dhcp,info Guest WiFi deassigned 10.0.0.104 from DC:37:14:EA:A8:2F
Aug/05/2015 12:32:40 dhcp,info Shelf Life DHCP deassigned 192.168.10.144 from D0:22:BE:A9:FC:57
Aug/05/2015 12:32:40 dhcp,info Shelf Life DHCP assigned 192.168.10.144 to D0:22:BE:A9:FC:57
Aug/05/2015 12:32:43 firewall,info SSH_Blacklist_10Day_Ban input: in:ether1-gateway - Digis out:(none), src-mac a8:b1:d4:ab:f2:c2, proto TCP (SYN), 91.200.12.111:19924->72.250.214.12:22, len 60
Aug/05/2015 12:32:46 dhcp,info Guest WiFi assigned 10.0.0.104 to DC:37:14:EA:A8:2F
Aug/05/2015 12:33:03 dhcp,info Guest WiFi deassigned 10.0.0.121 from 64:6C:B2:80:86:99

2

I have the same with 1 user on my guest network.
The signal is too weak for a stable link, this can be seen on the overview page.

3

Ah OK that makes sense. I think I simply wasn’t understanding what was going on. This router is in a server closet, and we have many APs up to 300 yards away. So the router is seeing those APs, connecting when signal gets strong enough, but disconnects when it’s too weak. No need for worry then?

4

I had the same problem with Mikrotik RB951G. The reason was a short “Lease Time” in DHCP Server settings. IP - DHCP Server - DHCP - Lease Time, I set 1d 00:00:00. Since, ther were no problem.