RB2011UiAS-2HnD link down

RouterOS General
1

Hello! :slight_smile:
Constantly link down in the model RB2011.
In two separate establishments, in both cases connected to them two access points UniFi AP (with 1 VLAN for clients). Two UniFi is connected to the gigabit ports. With poe injectors (or not, different configurations). Below is an example of the log router with POE 10 port. Ether1 (gateway) sometimes drop too.

03:35:50 dhcp,info server_vlan deassigned 192.168.2.242 from 90:xx:xx:xx:xx:4C 
03:43:53 interface,info ether8-slave-local link down 
03:43:57 interface,info ether8-slave-local link up (speed 100M, full duplex) 
03:48:20 interface,info ether8-slave-local link down 
03:48:24 interface,info ether8-slave-local link up (speed 100M, full duplex) 
03:53:21 dhcp,info server_vlan deassigned 192.168.2.224 from E4:xx:xx:xx:xx:3C 
03:54:44 dhcp,info server_vlan deassigned 192.168.2.227 from AC:xx:xx:xx:xx:47 
03:58:47 interface,info ether8-slave-local link down 
03:58:50 interface,info ether8-slave-local link up (speed 100M, full duplex) 
04:04:44 interface,info ether8-slave-local link down 
04:04:47 interface,info ether8-slave-local link up (speed 100M, full duplex) 
04:18:30 dhcp,info server_vlan deassigned 192.168.2.230 from 94:xx:xx:xx:xx:C2 
04:25:10 interface,info ether8-slave-local link down 
04:25:14 interface,info ether8-slave-local link up (speed 100M, full duplex) 
04:30:07 interface,info ether8-slave-local link down 
04:30:11 interface,info ether8-slave-local link up (speed 100M, full duplex) 
04:34:48 dhcp,info server_vlan deassigned 192.168.2.225 from A8:xx:xx:xx:xx:A9 
05:05:03 interface,info ether8-slave-local link down 
05:05:07 interface,info ether8-slave-local link up (speed 100M, full duplex) 
05:17:50 dhcp,info server_vlan deassigned 192.168.2.231 from 1C:xx:xx:xx:xx:92 
05:21:01 interface,info ether8-slave-local link down 
05:21:05 interface,info ether8-slave-local link up (speed 100M, full duplex) 
05:26:07 dhcp,info server_vlan deassigned 192.168.2.236 from 94:xx:xx:xx:xx:84 
05:29:57 interface,info ether8-slave-local link down 
05:30:00 interface,info ether8-slave-local link up (speed 100M, full duplex) 
06:13:23 interface,info ether8-slave-local link down 
06:13:26 interface,info ether8-slave-local link up (speed 100M, full duplex) 
06:47:19 interface,info ether8-slave-local link down 
06:47:23 interface,info ether8-slave-local link up (speed 100M, full duplex) 
06:53:46 interface,info ether8-slave-local link down 
06:53:49 interface,info ether8-slave-local link up (speed 100M, full duplex) 
07:00:42 interface,info ether8-slave-local link down 
07:00:46 interface,info ether8-slave-local link up (speed 100M, full duplex) 
07:08:09 interface,info ether8-slave-local link down 
07:08:12 interface,info ether8-slave-local link up (speed 100M, full duplex) 
07:16:07 interface,info ether8-slave-local link down 
07:16:10 interface,info ether8-slave-local link up (speed 100M, full duplex) 
07:21:03 interface,info ether8-slave-local link down 
07:21:07 interface,info ether8-slave-local link up (speed 100M, full duplex) 
07:24:30 dhcp,info server_vlan assigned 192.168.2.241 to 98:xx:xx:xx:xx:2A 
07:28:30 interface,info ether8-slave-local link down 
07:28:33 interface,info ether8-slave-local link up (speed 100M, full duplex) 
07:36:18 dhcp,info server_vlan assigned 192.168.2.250 to AC:xx:xx:xx:xx:9A 
07:39:20 dhcp,info server_vlan assigned 192.168.2.249 to 28:xx:xx:xx:xx:D3 
09:25:26 interface,info ether8-slave-local link down 
09:25:29 interface,info ether8-slave-local link up (speed 100M, full duplex) 
09:29:53 interface,info ether8-slave-local link down 
09:29:57 interface,info ether8-slave-local link up (speed 100M, full duplex) 
09:34:20 interface,info ether8-slave-local link down 
09:34:24 interface,info ether8-slave-local link up (speed 100M, full duplex) 
09:38:21 dhcp,info server_vlan assigned 192.168.2.228 to E8:xx:xx:xx:xx:3B 
09:56:48 interface,info ether8-slave-local link down 
09:56:52 interface,info ether8-slave-local link up (speed 100M, full duplex) 
10:09:33 dhcp,info server_vlan assigned 192.168.2.224 to E4:xx:xx:xx:xx:3C 
10:10:29 dhcp,info server_vlan assigned 192.168.2.248 to A8:xx:xx:xx:xx:65 
10:34:28 dhcp,info server_vlan assigned 192.168.2.242 to 90:xx:xx:xx:xx:4C 
10:42:23 dhcp,info default deassigned 192.168.1.82 from 04:xx:xx:xx:xx:00 
10:42:23 dhcp,info default assigned 192.168.1.82 to 04:xx:xx:xx:xx:00 
10:44:57 dhcp,info server_vlan assigned 192.168.2.223 to 84:xx:xx:xx:xx:A5 
11:07:33 dhcp,info server_vlan assigned 192.168.2.225 to A8:xx:xx:xx:xx:A9 
11:08:00 dhcp,info server_vlan assigned 192.168.2.235 to A0:xx:xx:xx:xx:0F 
11:12:58 dhcp,info default deassigned 192.168.1.80 from BC:xx:xx:xx:xx:28 
11:12:58 dhcp,info default assigned 192.168.1.80 to BC:xx:xx:xx:xx:28 
11:18:14 dhcp,info server_vlan assigned 192.168.2.222 to F4:xx:xx:xx:xx:F0 
11:19:54 dhcp,info server_vlan assigned 192.168.2.221 to 0C:xx:xx:xx:xx:B2 
11:19:56 dhcp,info server_vlan deassigned 192.168.2.221 from 0C:xx:xx:xx:xx:B2 
11:19:56 dhcp,info server_vlan assigned 192.168.2.221 to 0C:xx:xx:xx:xx:B2 
11:24:11 dhcp,info server_vlan deassigned 192.168.2.225 from A8:xx:xx:xx:xx:A9 
11:24:12 dhcp,info server_vlan assigned 192.168.2.225 to A8:xx:xx:xx:xx:A9 
11:26:58 dhcp,info server_vlan assigned 192.168.2.240 to 70:xx:xx:xx:xx:B6 
11:34:36 dhcp,info server_vlan assigned 192.168.2.232 to 40:xx:xx:xx:xx:69 
11:34:48 dhcp,info server_vlan assigned 192.168.2.233 to CC:xx:xx:xx:xx:5F 
11:37:11 dhcp,info server_vlan assigned 192.168.2.236 to 94:xx:xx:xx:xx:84 
11:54:52 dhcp,info server_vlan assigned 192.168.2.229 to D0:xx:xx:xx:xx:B2 
11:55:17 interface,info ether2-master-local link down 
11:55:19 interface,info ether2-master-local link up (speed 100M, full duplex) 
11:55:37 interface,info ether2-master-local link down 
11:55:39 interface,info ether2-master-local link up (speed 100M, full duplex) 
11:55:54 interface,info ether2-master-local link down 
11:55:56 interface,info ether2-master-local link up (speed 100M, full duplex)

Setting up my previously been configured differently (in bridge) without switch. But because of this problem, I set up so as it is now, and updated.
On all 951 models it works well in this configuration.
Sorry for my English. Thx for help.
compact_config.rsc

2

And from other rb2011 routerboard.. (2 UniFi, with poe injectors).

08:59:02 dhcp,info server1 deassigned 192.168.3.254 from 64:xx:xx:xx:xx:C6 
09:10:19 interface,info ether3-slave-local link down 
09:10:21 interface,info ether3-slave-local link up (speed 1G, full duplex) 
09:36:44 interface,info ether3-slave-local link down 
09:36:56 interface,info ether3-slave-local link up (speed 100M, full duplex) 
09:37:28 interface,info ether3-slave-local link down 
09:37:31 interface,info ether3-slave-local link up (speed 1G, full duplex) 
09:39:35 dhcp,info server1 deassigned 192.168.3.185 from 1C:xx:xx:xx:xx:5D 
09:39:36 dhcp,info server1 assigned 192.168.3.187 to 98:xx:xx:xx:xx:72 
09:59:23 interface,info ether3-slave-local link down 
09:59:28 interface,info ether3-slave-local link up (speed 100M, full duplex) 
10:00:28 interface,info ether3-slave-local link down 
10:00:31 interface,info ether3-slave-local link up (speed 1G, full duplex) 
10:04:24 dhcp,info server1 deassigned 192.168.3.17 from A0:xx:xx:xx:xx:30 
10:14:06 dhcp,info server1 assigned 192.168.3.188 to A0:xx:xx:xx:xx:66 
10:17:40 interface,info ether1-gateway link down 
10:17:44 interface,info ether1-gateway link up (speed 100M, full duplex) 
10:17:45 interface,info ether1-gateway link down 
10:17:48 interface,info ether1-gateway link up (speed 100M, full duplex) 
10:17:53 interface,info ether1-gateway link down 
10:18:08 interface,info ether1-gateway link up (speed 100M, full duplex) 
10:18:17 dhcp,critical,error dhcp-client on ether1-gateway lost IP address 192.168.1.2 - received NAK from dhcp server 192.168.1.1 
10:18:17 system,info item removed 
10:18:17 system,info item removed 
10:18:21 system,info item added 
10:18:21 system,info item added 
10:18:21 dhcp,info dhcp-client on ether1-gateway got IP address 192.168.1.2 
10:19:26 interface,info ether3-slave-local link down 
10:19:30 interface,info ether3-slave-local link up (speed 100M, full duplex) 
10:20:30 interface,info ether3-slave-local link down 
10:20:33 interface,info ether3-slave-local link up (speed 1G, full duplex) 
10:28:49 dhcp,info server1 deassigned 192.168.3.186 from 14:xx:xx:xx:xx:7E 
10:29:18 dhcp,info server1 assigned 192.168.3.189 to DC:xx:xx:xx:xx:17 
10:31:45 dhcp,info server1 assigned 192.168.3.190 to 78:xx:xx:xx:xx:12 
10:39:40 interface,info ether3-slave-local link down 
10:41:42 interface,info ether3-slave-local link up (speed 100M, full duplex) 
10:43:02 interface,info ether3-slave-local link down 
10:43:04 interface,info ether3-slave-local link up (speed 1G, full duplex)
3

Hello!

Every time I have had such problems was because of problems in the cable or connectors or one of the two Ethernet interfaces.

Try switching port on the RB and verify that logs persist.

Regards,

4

Mikrotik (1st log) almost new, all new cable, crimp quality is excellent. Copper cables, UTP, the maximum length of 25 meters. Ports must be working. Mikrotik 2 (log 2), the old, all cables of different industries and crimp. Cable 3 Port changed, no results. Also made a static address for the UniFi AP and put the output power of the middle. Change now the connection port. We will see..

5

Any update to this?