Traffic on not runing port

RouterOS General
1

I see the strange behavior of the router. some time after the restart at the port which is not slave, not in included to bridge and no link we can see traffic, pls see attached screenshot. after that we have can seen other strange problems (example: dhcp client can not get ip from ether2).


                   uptime: 1d21h43m
                  version: 6.34.2 (stable)
               build-time: Feb/18/2016 06:31:18
              free-memory: 5.6MiB
             total-memory: 32.0MiB
                      cpu: MIPS 24Kc V7.4
                cpu-count: 1
            cpu-frequency: 400MHz
                 cpu-load: 14%
           free-hdd-space: 48.5MiB
          total-hdd-space: 64.0MiB
  write-sect-since-reboot: 314136
         write-sect-total: 3252589
               bad-blocks: 0%
        architecture-name: mipsbe
               board-name: RB750
                 platform: MikroTik


 /interface bridge port print
Flags: X - disabled, I - inactive, D - dynamic 
 #    INTERFACE                                              BRIDGE                                             PRIORITY  PATH-COST    HORIZON
 0    ether4                                                 br-lan                                                 0x80         10       none
 1    ether5                                                 br-lan                                                 0x80         10       none
 2  D ovpn-cam                                               bridge-vpn                                             0x80         10       none
 
/interface ethernet monitor ether3
                      name: ether3
                    status: no-link
          auto-negotiation: done
               advertising: 10M-half,10M-full,100M-half,100M-full
  link-partner-advertising: 

 /interface monitor-traffic ether3
                        name:     ether3
       rx-packets-per-second:      1 196
          rx-bits-per-second:   12.6Mbps
    fp-rx-packets-per-second:          0
       fp-rx-bits-per-second:       0bps
         rx-drops-per-second:          0
        rx-errors-per-second:          0
       tx-packets-per-second:        670
          tx-bits-per-second:  382.5kbps
    fp-tx-packets-per-second:          0
       fp-tx-bits-per-second:       0bps
         tx-drops-per-second:          0
        tx-errors-per-second:          0
2

Hi,

Is it always the same port acting up?

If so try replacing the cable or moving the cable to a different port to see if the issue is fixed.

I have found that usually if a board has lightning damage this happens, after a reboot it works for a while and then stops

3

ether3 port do not have cable. other ports are busy

4

Can be master of any other port enslaved in switch to it. Or there can be just renamed ports. Check it’s original name. Export can reveal that.

5

Downgrade firmware to 6.27 fix this problem, uptime 2 days. firmware 6.34.x looks like a broken.