No — this is wrong. Numbers alone won’t give you a yay or nay regarding whether you have a hardware issue or not. I hope I made that clear in my message
The consistency is what is important.
Sam
That was precisely my point. 
It’s not enough to get numbers above 200Mbps, they have to be consistently high. If they are consistently high, you can be pretty sure you don’t have an issue. If they aren’t, then you might have an issue, but you need to exclude a lot of other possibilities first.
The “consistently” part is what I was emphasising: you yourself were assuring me a couple of days ago that if I got iperf numbers above 200Mb/s, there couldn’t be a hardware flaw. (And Graham was repeating that earlier today).
You probably meant “consistently” of course. 
But people reading it in this thread and not seeing the word “consistently” might not realise that.
Right. If it’s up and down like a yo-yo, then there’s a problem
Sam
Another slow device to report - with my Netgear GS348-100EUS switch. Other devices manage 950Mbps both directions, the 4K+ manages about 850 one way and 130 the other. No silly routers in the way, all Cat6.
osmc@vero4k:~/.kodi/userdata$ iperf3 -c 192.168.0.5
Connecting to host 192.168.0.5, port 5201
[ 4] local 192.168.0.8 port 51825 connected to 192.168.0.5 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 19.6 MBytes 164 Mbits/sec 34 17.0 KBytes
[ 4] 1.00-2.00 sec 16.8 MBytes 141 Mbits/sec 17 12.7 KBytes
[ 4] 2.00-3.00 sec 15.2 MBytes 127 Mbits/sec 29 8.48 KBytes
[ 4] 3.00-4.00 sec 15.9 MBytes 133 Mbits/sec 24 25.5 KBytes
[ 4] 4.00-5.00 sec 15.6 MBytes 131 Mbits/sec 44 19.8 KBytes
[ 4] 5.00-6.00 sec 16.4 MBytes 138 Mbits/sec 22 17.0 KBytes
[ 4] 6.00-7.00 sec 15.7 MBytes 132 Mbits/sec 37 14.1 KBytes
[ 4] 7.00-8.00 sec 15.8 MBytes 132 Mbits/sec 28 4.24 KBytes
[ 4] 8.00-9.00 sec 11.6 MBytes 97.4 Mbits/sec 46 5.66 KBytes
[ 4] 9.00-10.00 sec 15.5 MBytes 130 Mbits/sec 30 8.48 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 158 MBytes 133 Mbits/sec 311 sender
[ 4] 0.00-10.00 sec 157 MBytes 132 Mbits/sec receiver
iperf Done.
osmc@vero4k:~/.kodi/userdata$ iperf3 -R -c 192.168.0.5
Connecting to host 192.168.0.5, port 5201
Reverse mode, remote host 192.168.0.5 is sending
[ 4] local 192.168.0.8 port 51839 connected to 192.168.0.5 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 97.6 MBytes 818 Mbits/sec
[ 4] 1.00-2.00 sec 103 MBytes 864 Mbits/sec
[ 4] 2.00-3.00 sec 97.9 MBytes 822 Mbits/sec
[ 4] 3.00-4.00 sec 96.8 MBytes 812 Mbits/sec
[ 4] 4.00-5.00 sec 101 MBytes 851 Mbits/sec
[ 4] 5.00-6.00 sec 99.7 MBytes 837 Mbits/sec
[ 4] 6.00-7.00 sec 96.7 MBytes 811 Mbits/sec
[ 4] 7.00-8.00 sec 102 MBytes 856 Mbits/sec
[ 4] 8.00-9.00 sec 100 MBytes 841 Mbits/sec
[ 4] 9.00-10.00 sec 99.8 MBytes 837 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 998 MBytes 837 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 996 MBytes 835 Mbits/sec receiver
iperf Done.That doesn’t sound like the abyssmal 1Mbps TX performance that some users reported.
How long is your cable run?
Sam
Are you sure the device you are testing this from is able to handle the speed?
And please test while nothing else runs (uses the bandwidth) 
Lock the Kids out of the network for the duration of the test (Beware the screaming! ) 
It goes > 100Mbps frequently, so it’s not the hardware problem that a few others experienced.
Cable run is probably 30 metres tops. Other devices are getting 950 one way and 750 the other with retries so there is some sort of issue (might be nic bonding overhead).
But the 4K+ is doing much worse than the rest of the network (Atom HTPCs and Intel desktops all running Debian).
Any idea if jumbo frames can be enabled somehow?
Can you try with a shorter run to something in between like a router or switch?
Max frame size is about 3500.
But I’ve seen this exceeded in the upstream driver, so I’ll investigate.
Cheers
Sam
i can’t get it to do anything but 1500 mtu so expect its not in the kernel?
I’ll try a short cable and get back to you - assume it’ll boot headless ok without being plugged into a TV?
Yes, that will be fine.
I will check this and get back to you.
Sam
Sam, how fast should it be FROM the Vero? I think people are expecting gigabit speeds in both directions, but I’ve never expected that to be the case.
Uploading from the Vero is nowhere near gigabit for me (I think it’s around 300Mbit - but don’t recall). Downloading to the Vero is 940Mbit.
It heavily depends on the environment.
I can get 930Mbps without network congestion.
Keep in mind that the latest changes favour RX over TX performance; as that’s likely where performance is going to make a difference with streaming.
Naturally I expect a number of people to run iperf tests as they get their device. From what we’ve seen re. faulty units; it is immediately evident if your device has a problem. Watching video wouldn’t be possible for example.
Cheers,
Sam
930Mbps in both directions is impossible for me for whatever reason… Thankfully the RX of the Vero is getting full speed.
It’s probably worth checking with another setup; making sure your device can RX packets at that speed.
Does it really matter, though? I only need to be able to receive data at the Vero quickly, right?
If it’s working for you, you’re not experiencing an issue.
TX packets are needed to acknowledge (ACK) RX packets when using TCP. This is why streams break down with those users who have affected units.
I was quite surprised how easily performance drops on my network due to congestion. Likely caused by CCTV feeds at home
Sam
Sure. How much bandwidth does one need for TX packets? Not much I’d imagine?
Hi Sam,
I can asure you that I have no network issues at my home, the new Vero 4K+ has either a hardware or software issue. If you can ship me a unit that should work, I am happy to test it.
I also use the Vero $K model with an external 1G adapter and that works just fine. Also using a X20 without any issues using 4K content.
My NAS is a synology DS1817+
I have some questions about your network. So the thread doesn’t get too busy I will PM them.