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Joined: Mon Dec 03, 2018 11:07 pm

Xiaomi TV 4a & 951G-2HnD ethernet not working

Mon Dec 03, 2018 11:41 pm

Hi,

I had a strange problem with my Xiaomi TV 4a and 951G-2HnD if Ethernet is used.

They successfully negotiate connect at 100M-full but it's almost not working.
I write almost because I see traffic from TV via counters and switch mirroring and sometimes (when router is rebooting for example) 1-3 ICMP packages returns.
But connection is not working.

If I configured interface manually to 10M-full it's working without any problems.
To exclude any problem with TV or eth cable I put DGS-1008d (switch) between TV and 951G-2HnD and it works on 100M bandwidth without any problem

I suggest that there is a problem on L2 level but I don't know any instruments or debug tools for further investigation.

Please, help me to deal with this. Thank you.

Here is some info about settings and versions:
[admin@MikroTik] /interface ethernet> monitor ether4-slave-local
                      name: ether4-slave-local
                    status: link-ok
          auto-negotiation: done
                      rate: 100Mbps
               full-duplex: yes
           tx-flow-control: no
           rx-flow-control: no
               advertising: 10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full
  link-partner-advertising: 10M-half,10M-full,100M-half,100M-full
  
  [admin@MikroTik] /interface ethernet> print detail 
...
 3 RS name="ether4-slave-local" default-name="ether4" mtu=1500 l2mtu=1598 mac-address=D4:CA:6D:07:74:73 orig-mac-address=D4:CA:6D:07:74:73 arp=enabled arp-timeout=auto loop-protect=default 
      loop-protect-status=off loop-protect-send-interval=5s loop-protect-disable-time=5m auto-negotiation=yes advertise=10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full full-duplex=yes 
      tx-flow-control=off rx-flow-control=off speed=100Mbps bandwidth=unlimited/unlimited switch=switch1 

  [admin@MikroTik] /interface ethernet> print detail stats-detail
   3 RS name="ether4-slave-local" driver-rx-byte=3 774 188 driver-rx-packet=9 866 driver-tx-byte=710 024 driver-tx-packet=6 324 rx-bytes=3 817 652 rx-too-short=0 rx-64=962 rx-65-127=1 209 rx-128-255=51 
      rx-256-511=6 940 rx-512-1023=3 rx-1024-1518=728 rx-1519-max=0 rx-too-long=0 rx-broadcast=1 189 rx-pause=0 rx-multicast=7 287 rx-fcs-error=0 rx-align-error=0 rx-fragment=0 rx-overflow=0 
      tx-bytes=1 107 984 tx-64=3 076 tx-65-127=3 718 tx-128-255=1 053 tx-256-511=949 tx-512-1023=16 tx-1024-1518=38 tx-1519-max=0 tx-too-long=0 tx-broadcast=2 922 tx-pause=0 tx-multicast=2 689 
      tx-underrun=0 tx-collision=0 tx-excessive-collision=0 tx-multiple-collision=0 tx-single-collision=0 tx-excessive-deferred=0 tx-deferred=0 tx-late-collision=0 

[admin@MikroTik] /interface ethernet switch port> print 
Flags: I - invalid 
 #   NAME                                                                          SWITCH                                                                          VLAN-MODE VLAN-HEADER    DEFAULT-VLAN-ID
 0   ether1-gateway                                                                switch1                                                                         disabled  leave-as-is               auto
 1   ether2-master-local                                                           switch1                                                                         disabled  leave-as-is               auto
 2   ether3-slave-local                                                            switch1                                                                         disabled  leave-as-is               auto
 3   ether4-slave-local                                                            switch1                                                                         disabled  leave-as-is               auto
 4   ether5-slave-local                                                            switch1                                                                         disabled  leave-as-is               auto
 5   switch1-cpu                                                                   switch1                                                                         disabled  leave-as-is               auto

[admin@MikroTik] > /system package print 
Flags: X - disabled 
 #   NAME                                                                                  VERSION                                                                                  SCHEDULED              
 0   routeros-mipsbe                                                                       6.43.7                                                                                                          
 1   system                                                                                6.43.7                                                                                                          
 2   ipv6                                                                                  6.43.7                                                                                                          
 3   wireless                                                                              6.43.7                                                                                                          
 4   hotspot                                                                               6.43.7                                                                                                          
 5   dhcp                                                                                  6.43.7                                                                                                          
 6   mpls                                                                                  6.43.7                                                                                                          
 7   routing                                                                               6.43.7                                                                                                          
 8   ppp                                                                                   6.43.7                                                                                                          
 9   security                                                                              6.43.7                                                                                                          
10   advanced-tools                                                                        6.43.7      

[admin@MikroTik] > /system routerboard print 
       routerboard: yes
             model: 951G-2HnD
     serial-number: XXXXXX
     firmware-type: ar9344
  factory-firmware: 3.10
  current-firmware: 6.43.7
  upgrade-firmware: 6.43.7

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