Ethernet problems with pcDuino3nano

[hornet]

Hi Igor,

 

First of all thanks a lot for all the work that you do, its awesome. 

 

I do experience some problems with the latest kernel version 3.4.110 that I compiled with PMP support with the RTL8211E PHY interface. Its something weird going on. I can ping the card but i get multiple interruptions:

 

PING 10.20.104.243 (10.20.104.243) 56(84) bytes of data.

64 bytes from 10.20.104.243: icmp_seq=1 ttl=61 time=0.362 ms

x

64 bytes from 10.20.104.243: icmp_seq=3 ttl=61 time=0.300 ms

64 bytes from 10.20.104.243: icmp_seq=4 ttl=61 time=0.276 ms

x

x

x

64 bytes from 10.20.104.243: icmp_seq=7 ttl=61 time=0.246 ms

64 bytes from 10.20.104.243: icmp_seq=8 ttl=61 time=0.256 ms

64 bytes from 10.20.104.243: icmp_seq=9 ttl=61 time=0.455 m

 

And most interesting is that if I do a nmap on some ports they appear filtered, but their not, there is no firewall enabled.

 

Starting Nmap 6.45 ( http://nmap.org) at 2015-11-11 17:16 EST

Nmap scan report for 10.20.104.243

Host is up (0.00070s latency).

PORT   STATE    SERVICE

22/tcp filtered ssh

 

Starting Nmap 6.45 ( http://nmap.org) at 2015-11-11 17:17 EST

Nmap scan report for 10.20.104.243

Host is up (0.00034s latency).

PORT   STATE    SERVICE

80/tcp filtered http

 

Now, at home I'm using a TP link wd841 router and seems to work but not always, to make it work i need to unplug the net cable and then plug it back in and seems its working fine, but at work, where I have a bunch of HP switches seems its not liking them at all. I even tried to connect it directly to a laptop and same problem, I can ping but can't reach any service hosted by the OS.

 

I understand there's no need for driver for this ethernet chip because its just a Level 1 transceiver so I assume there would be bugs in GMAC?

 

Any help would be much appreciated. I'l try to compile some older kernel version too just to give it a test. 

 

hornet

 

[Igor]

This bug / limitation should be fixed within U-boot. This is the case with Banana.