Problems with gigabit ethernet connection (Vero4K+)

Help and Support Vero 4K / Vero 4K +
1

Hi,

I’m having very weird issues with my gigabit ethernet connection on my Vero4K+.

This started right after I reinstalled OSMC from a SD card (although I think reinstalling OSMC might not be related at all).

The symptoms are the following:

  • When I connect an ethernet cable, gigabit LED on my ethernet switch turns on, Vero4K+ gets an IP from the DHCP server, but it says “Status: eth0 (No internet)”.
  • I tried with several cables that work with other devices, I tried connecting directly to my router (which has a 4 ports switch), it fails the same way.
  • Vero4K+ cannot connect to the internet.
  • Vero4K+ cannot be pinged from the local network!
  • If I disable then re-enable the wired adapter from OSMC, it eventually connects after trying a dozen of times!
  • As far as I saw, the issue does not occur with the wifi adapter (I only ran one test).

20181018_204124
20181018_204124800×600 124 KB 

osmc@osmc:~$ uname -a
Linux osmc 3.14.29-117-osmc #1 SMP Mon Sep 3 00:16:47 UTC 2018 aarch64 GNU/Linux

I ran iperf (from my laptop which is on wifi, its TX rate is 700Mbps) after having managed to connect the Vero4K+ to LAN, and it looks good to me:

$ iperf3 -R -c 192.168.58.8
Connecting to host 192.168.58.8, port 5201
Reverse mode, remote host 192.168.58.196 is sending
[  5] local 192.168.58.240 port 59629 connected to 192.168.58.196 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  38.8 MBytes   326 Mbits/sec                  
[  5]   1.00-2.00   sec  59.9 MBytes   502 Mbits/sec                  
[  5]   2.00-3.00   sec  60.6 MBytes   508 Mbits/sec                  
[  5]   3.00-4.00   sec  56.4 MBytes   473 Mbits/sec                  
[  5]   4.00-5.00   sec  58.0 MBytes   487 Mbits/sec                  
[  5]   5.00-6.00   sec  57.7 MBytes   484 Mbits/sec                  
[  5]   6.00-7.00   sec  58.3 MBytes   489 Mbits/sec                  
[  5]   7.00-8.00   sec  59.7 MBytes   501 Mbits/sec                  
[  5]   8.00-9.00   sec  59.8 MBytes   502 Mbits/sec                  
[  5]   9.00-10.00  sec  58.1 MBytes   487 Mbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   570 MBytes   478 Mbits/sec   27             sender
[  5]   0.00-10.00  sec   567 MBytes   476 Mbits/sec                  receiver

iperf Done.

ifconfig eth0 says:

osmc@osmc:~$ ifconfig eth0
eth0: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC>  mtu 1500
        inet 192.168.58.8  netmask 255.255.255.0  broadcast 192.168.58.255
        ether c4:4e:ac:28:28:cf  txqueuelen 1000  (Ethernet)
        RX packets 5999  bytes 1842291 (1.7 MiB)
        RX errors 0  dropped 29  overruns 0  frame 0
        TX packets 3352  bytes 419053 (409.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 40

netstat -i says:

osmc@osmc:~$ netstat -i
Kernel Interface table
Iface      MTU    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0      1500  1017221      0    397 0       1426302      0      0      0 BMdRU
lo        4096      224      0      0 0           224      0      0      0 LRU

netstat -s says:

osmc@osmc:~$ netstat -s
Ip:
    Forwarding: 2
    1015225 total packets received
    38 with invalid addresses
    0 forwarded
    0 incoming packets discarded
    1015175 incoming packets delivered
    222845 requests sent out
    56 outgoing packets dropped
    693 dropped because of missing route
    24 reassemblies required
    12 packets reassembled ok
Icmp:
    115 ICMP messages received
    0 input ICMP message failed
    ICMP input histogram:
        destination unreachable: 112
        echo requests: 3
    115 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 112
        echo replies: 3
IcmpMsg:
        InType3: 112
        InType8: 3
        OutType0: 3
        OutType3: 112
Tcp:
    469 active connection openings
    17 passive connection openings
    0 failed connection attempts
    2 connection resets received
    1 connections established
    1002103 segments received
    1419325 segments sent out
    179 segments retransmitted
    0 bad segments received
    3 resets sent
Udp:
    10151 packets received
    112 packets to unknown port received
    0 packet receive errors
    1980 packets sent
    0 receive buffer errors
    0 send buffer errors
UdpLite:
TcpExt:
    19 TCP sockets finished time wait in fast timer
    1 packetes rejected in established connections because of timestamp
    25 delayed acks sent
    Quick ack mode was activated 7 times
    64 packets directly queued to recvmsg prequeue
    1012152 bytes directly in process context from backlog
    TCPDirectCopyFromPrequeue: 365249
    827486 packet headers predicted
    966 packet headers predicted and directly queued to user
    138211 acknowledgments not containing data payload received
    29796 predicted acknowledgments
    TCPSackRecovery: 7
    7 congestion windows recovered without slow start after partial ack
    137 fast retransmits
    6 forward retransmits
    TCPTimeouts: 21
    TCPLossProbes: 22
    TCPLossProbeRecovery: 2
    TCPDSACKOldSent: 7
    TCPDSACKOfoSent: 2
    TCPDSACKRecv: 9
    2 connections reset due to early user close
    7 connections aborted due to timeout
    TCPDSACKIgnoredNoUndo: 1
    TCPSackShifted: 6477
    TCPSackMerged: 682
    TCPSackShiftFallback: 413
    TCPRetransFail: 14
    TCPRcvCoalesce: 629382
    TCPOFOQueue: 3318
    TCPOFOMerge: 1
    TCPSpuriousRtxHostQueues: 2
    TCPAutoCorking: 4902
IpExt:
    InMcastPkts: 10200
    OutMcastPkts: 1194
    InBcastPkts: 286
    InOctets: 1259039741
    OutOctets: 1807734075
    InMcastOctets: 3189137
    OutMcastOctets: 291762
    InBcastOctets: 39194
    InNoECTPkts: 1015662

I am not sure that the issue comes from the Vero4K+, maybe I have a glitch on my network (at some point I thought there was an IP conflict, but there isn’t)…

Any idea?

Ben.

2

I updated to 3.14.29-121 by adding stretch-devel to /etc/apt/sources.list but the problem remains.

Ben.

3

Did the Vero operate without issue before you reinstalled?

4

That’s a bit odd. You connect to 192.168.58.8 but 192.168.58.196 is sending. Quick sanity check:

osmc@osmc-4k:~$ iperf3 -R -c 192.168.8.196
Connecting to host 192.168.8.196, port 5201
Reverse mode, remote host 192.168.8.196 is sending

(by coincidence, we are both using address 196!)

Your screen shot shows the Vero4K has an address 192.168.58.196 but ifconfig is showing 192.168.58.8.

Something seems to be incorrect with the IP addresses. I’d suggest you assign a static IP address for now on the Vero4K, then reboot OSMC.

1 Like
5

Agreed.

Also make sure that you haven’t accidentally assigned a static IP address within the DHCP range of the router; or the DHCP server may be handing this IP to the Vero as well as you using it for another machine

6

Did you remove the sd card after installing? I had a similar problem because I forgot to remove the sd card. When removed and rebooted problems where gone.

7

That’s a bit odd. You connect to 192.168.58.8 but 192.168.58.196 is sending.

That’s only because I did run many tests, so my IP changed and I messed up while copying/pasting and mixed two different tests.

8

I’d suggest you assign a static IP address for now on the Vero4K, then reboot OSMC.

Yes of course, that’s the first thing I tried because I suspected an IP conflict.

9

Did you remove the sd card after installing? I had a similar problem because I forgot to remove the sd card. When removed and rebooted problems where gone.

Yes, I had the SD removed right after re-installing OSMC.

10

The problem hasn’t occurred again although I rebooted a few times…
Weird…
:crossed_fingers:

11

If it happens again, try rebooting router or whatever serves up DHCP; and that will probably solve it.

12

Rebooting the router (which runs the DHCP server) was one of the first things I tried, and I still had the problem.

13

Are things working as expected now?

14

So far so good. :+1: