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Ethernet problems with pcDuino3nano


hornet

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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
 
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