You could run iperf3 for 10 minutes to see if it is stable.
I wonder if it is an issue with the Kodi NFS mounts. Maybe try a Kernel mount and see if problem goes away.
I did a 10 min test but after approx. 4 minutes the degeneration happens.
From my point of view the HW is faulty since the Vero 4K uses the same āNFS mechanicā and works flawless.
[ 5] 256.00-257.00 sec 112 MBytes 941 Mbits/sec 0 267 KBytes
[ 5] 257.00-258.00 sec 112 MBytes 941 Mbits/sec 0 277 KBytes
[ 5] 258.00-259.00 sec 112 MBytes 941 Mbits/sec 0 281 KBytes
[ 5] 259.00-260.00 sec 112 MBytes 941 Mbits/sec 0 281 KBytes
[ 5] 260.00-261.00 sec 113 MBytes 941 Mbits/sec 0 281 KBytes
[ 5] 261.00-262.00 sec 112 MBytes 942 Mbits/sec 0 286 KBytes
[ 5] 262.00-263.00 sec 112 MBytes 941 Mbits/sec 1 222 KBytes
[ 5] 263.00-264.00 sec 112 MBytes 941 Mbits/sec 0 256 KBytes
[ 5] 264.00-265.00 sec 112 MBytes 942 Mbits/sec 0 277 KBytes
[ 5] 265.00-266.00 sec 112 MBytes 941 Mbits/sec 0 287 KBytes
[ 5] 266.00-267.00 sec 112 MBytes 941 Mbits/sec 0 291 KBytes
[ 5] 267.00-268.00 sec 112 MBytes 941 Mbits/sec 1 205 KBytes
[ 5] 268.00-269.00 sec 112 MBytes 940 Mbits/sec 0 246 KBytes
[ 5] 269.00-270.00 sec 112 MBytes 940 Mbits/sec 0 272 KBytes
[ 5] 270.00-271.00 sec 112 MBytes 942 Mbits/sec 0 284 KBytes
[ 5] 271.00-272.01 sec 46.0 MBytes 382 Mbits/sec 53 1.41 KBytes
[ 5] 272.01-273.01 sec 1.12 MBytes 9.38 Mbits/sec 136 1.41 KBytes
[ 5] 273.01-274.01 sec 1.12 MBytes 9.38 Mbits/sec 61 1.41 KBytes
[ 5] 274.01-275.01 sec 1.49 MBytes 12.5 Mbits/sec 76 32.5 KBytes
[ 5] 275.01-276.01 sec 382 KBytes 3.13 Mbits/sec 26 1.41 KBytes
[ 5] 276.01-277.01 sec 1.12 MBytes 9.38 Mbits/sec 54 1.41 KBytes
[ 5] 277.01-278.01 sec 1.49 MBytes 12.5 Mbits/sec 74 1.41 KBytes
[ 5] 278.01-279.01 sec 1.12 MBytes 9.38 Mbits/sec 42 1.41 KBytes
[ 5] 279.01-280.00 sec 1.12 MBytes 9.47 Mbits/sec 73 15.6 KBytes
[ 5] 280.00-281.01 sec 764 KBytes 6.20 Mbits/sec 23 1.41 KBytes
[ 5] 281.01-282.01 sec 1.12 MBytes 9.38 Mbits/sec 50 1.41 KBytes
[ 5] 282.01-283.01 sec 1.12 MBytes 9.38 Mbits/sec 47 1.41 KBytes
[ 5] 283.01-284.01 sec 1.12 MBytes 9.38 Mbits/sec 78 32.5 KBytes
[ 5] 284.01-285.01 sec 1.12 MBytes 9.38 Mbits/sec 40 46.7 KBytes
[ 5] 285.01-286.01 sec 1.12 MBytes 9.38 Mbits/sec 63 1.41 KBytes
[ 5] 286.01-287.01 sec 1.12 MBytes 9.38 Mbits/sec 53 1.41 KBytes
[ 5] 287.01-288.01 sec 764 KBytes 6.26 Mbits/sec 59 33.9 KBytes
[ 5] 288.01-289.00 sec 1.12 MBytes 9.45 Mbits/sec 67 22.6 KBytes
That doesnāt look good. Is your device connected to a switch with EEE enabled?
Have you tried an older version of OSMC to see if things work better there?
Have you tried swapping the power supplies of the Vero4k and Vero4k+?
Also you might want to check with ethtool if anything looks odd.
sudo apt-get install ethtool
ethtool eth0
Yes, I wiped the device and installed the same OS version like the working Vero 4K, still same situation. No, I use no switch but a centrally distributed Fritzbox with wires to every room, in this case living room with one physical cat 6 cable. my TV is connected via WIFI.
Yes, I swapped the powersupply with the one from the Vero 4K, same issue. I think the Vero 4K+ is, after 4 years of service, slowly fading away.
osmc@osmc4kplus:~$ ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: external
Auto-negotiation: on
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 0x0000003f (63)
drv probe link timer ifdown ifup
Link detected: yes
osmc@osmc4kplus:~$
I did some further network testing using iperf3 for longer period of times.
After approx 4 -5 min the connection bandwidth drops below 10Mbit and sometimes recovers back to the usual 940Mbit.
I did set a bandwidth limit on my Synology via traffic control on port 5201 to see if the iperf3 will show the result, it did.
Here are the tests
1000Mbit - Drops after 4 - 5 mins, does not recover
500Mbit - Drops after 4 -5 mins, does not recover
150Mbit - Drops after 4 - 5 mins, does not recover
I now believe my VERO4K+ is dying soon because the Network Port seems to be the issue. I did not test WIFI .
I havenāt seen a case of the Ethernet PHY degrading over time.
Iād suggest trying with a different Ethernet cable at first.
Then Iād try to drop the connection to 100Mbps with ethtool. If this is stable, it could indicate an issue with the router or cable.
I operate the vero 4k with an GBit USB Adapter to ensure leveraging my network bandwidth of 1gbit.
That been said the cable is not the problem
I did a test with 100mbit and buffering happens.
I can send you the device to UK for further testing if you believe this is value adding.
Your thoughts?
So to clarify: you changed the speed using ethtool, and then re-ran iperf and you have tried this with another cable?
Yes, swapped cable and did some tests using different bandwidth restrictions. The speed degenerates all the time.
Same tests with the Vero 4K work without glitches on same cable.
You can send the device back to us (support@osmc.tv) but thereās no guarantee we can fix it as it would be out of warranty now.
You could also use an Ethernet adapter on the device or Wifi.
Dear both,
the issue is resolved.
After continuous testing with iperf3 i realized a pattern when the drops happened, both with LAN and WIFI. The connection dropped now almost every time after 300 seconds (5 mins) which made me think something is blocking traffic due to whatever reason.
That been said I moved on to my Fritzbox which acts as DHCP server to distribute the LAN and WIFI connections throughout the flat.
I literately cleaned the entire Fritzbox of old network device connections and also alternated the standard lease duration down to 1 day ( was 10 days)
After doing this clean up the iperf works flawless without any glitch over more than 10 tests with each runtime of 1200 seconds ( 20 min)
So long story short - I did not realize the pattern since it was sometimes 300 seconds, another day it was 400 seconds but then it came down to exactly blocking traffic after 5 mins runtime.
The Vero4K+ is still healthy and back to its place in the living room!
THANK you both for the numerous suggestions and efforts to help solve the problem.
P.S. For sure, without such community and support I might already have disposed the device and ordered a new one just to face the same situation again
Great that it is working now.
While this sounds a bit strange as the Fritzbox in a setup where both devices are in the same LAN and connected via Ethernet just should do a switching job.
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indeed, i even rebooted the Fritzbox several times without any improvements which led me to the assumption the device HW is faulty or going to behave faulty when dealing with loads. Right now my assumption with the Fritzbox is, that there was a situation with either a IP conflict or a MAC address conflict causing the network issue. Anyhow, I am glad the device is back in business 
Thank you for the due diligence in last couple of days.
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Glad to hear this is resolved.
Sam
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