Slow network speed

[ytn]

I have a BananaPi running 4.2 (with Wheezy) and I am getting poor network speed. When testing download a file from the internet, I am averaging ~500k/s.

 

I have another BananaPi running 3.4 (also with Wheezy) and on that board, I am averaging ~3MB/s downloading the same file from the same location.

 

I tested this multiple times and the results are pretty much the same.

 

Any idea why network performance is so poor on 4.2?

 

Thanks.

[ddkDIZ]

I had a similar issue with the LIME2 / A20-SOM ( on a custom PCB )
had to set the Ethernet interface down to 100mbps ( Our routing was wrong for a 1000mbps link to be working well )
We get better throughput with the device set to 100 than we did with 1000.

this is in /etc/network/interfaces :
allow-hotplug eth0
iface eth0 inet dhcp
pre up mii-tool -F 100baseTx-FD eth0

This might not apply to you ( I think the timing settings for the banana Pi are set correctly )
 

[ytn]

Thanks for the feedback... I may have had a faulty Ethernet cable. I swapped cables as well as ports on my switch, and now speed seems much better, and more consistent with my other BPi running 3.4.

[Kevin Welsh]

With or without the suggestion from ddkDIZ above, I've got fairly slow eth0 traffic.

 

Using wget, I show 1.9M for a half second, and it quickly falls down to about 250K.

 

Any other ideas?

[monti]

See here:

http://forum.armbian.com/index.php/topic/31-problems-with-gigabit/

 

 

Some boards are nearly perfect, other can't be used with GBit.

Seems to be a A20-Problem.

[tkaiser]

Some boards are nearly perfect, other can't be used with GBit.

Seems to be a A20-Problem.

 

Nope, it's a problem with the PHY used and mainline kernel: http://irclog.whitequark.org/linux-sunxi/2016-03-10#15740723;

 

EDIT: I have a Lime2 that's pretty fast with 3.4.110 and when using 4.4 I can be happy if throughput exceeds 40 KB/s in one direction (no typo!)