AM4376: Linux SDK 8.02

Hello Vrund,

Can you please provide terminal output of what you are seeing?

Please also describe the network that you are plugged into.

Regards,

Nick

Hello,

I actually want to implement address collision detection functionality.

 To  send  request  on  interface  eth0  to  detect  any  neighbor   computers   with   IP
       192.168.10.200:

          arpsend -D -e 192.168.10.200 eth0

for that i was trying arpsend command which checks whether neighboring device has same IP as my device or not.

PFA.

Hello Vrund,

When I run a quick test on AM64x SDK 9.0 (different processor, similar filesystem) I also get arpsend: command not found. It also looks like "arp" is not a command that is recognized by this Linux filesystem:

root@am64xx-evm:~#
help arp
-sh: help: no help topics match `arp'.  Try `help help' or `man -k arp' or `info arp'.
root@am64xx-evm:~# info arp
-sh: info: command not found
root@am64xx-evm:~# man -k arp
-sh: man: command not found
root@am64xx-evm:~# arpsend
-sh: arpsend: command not found

However, there are clearly arp commands that work just fine (e.g., arping):

root@am64xx-evm:~# arping 192.168.1.100
ARPING 192.168.1.100 from 192.168.43.1 eth0
Unicast reply from 192.168.1.100 [a0:36:9f:75:d4:60] 0.277ms
Unicast reply from 192.168.1.100 [a0:36:9f:75:d4:60] 0.233ms
Unicast reply from 192.168.1.100 [a0:36:9f:75:d4:60] 0.272ms
^CSent 3 probe(s) (1 broadcast(s))
Received 3 response(s) (0 request(s), 0 broadcast(s))

Please try using arp commands that are defined to run your tests.

Regards,

Nick

Hello,

arping command is working.

But it is not useful.

PC: 192.168.1.10

Device: 192.168.1.10

if used arping from device 

arping 192.168.1.10 

it shows nothing. below is screen shot. left side device terminal. right side is PC cmd prompt.

I think arping is not the right way to implement address conflict detection.

Hello Vrund,

The question of which Linux software is best for detecting IP address collision, and how to run and test that software, is outside the scope of the TI forums (since that is a generic Linux question instead of a TI-specific question).

It looks like there are multiple potential tools out there, like 
arp-scan https://www.xmodulo.com/how-to-detect-ip-address-conflicts-in.html
IPwatchd https://serverfault.com/questions/136619/can-linux-report-ip-conflicts 
arpwatch https://serverfault.com/questions/136619/can-linux-report-ip-conflicts 

But none of those tools are bundled by default into the AM437x Linux SDK. You will need to install the tools yourself before you can test them.

Please note that I have not tested or validated any of those tools at this point in time.

Regards,

Nick

I understand.

do you have any source code for sending arp request and receiving arp response? or suggest one?

regards,

Vrund

Hello Vrund,

Arp request software is generic Linux code, nothing TI specific. So there is not anything in particular that I would suggest.

If you found code that you are interested in running on your EVM, but you are having difficulty figuring out how to add it into your Linux SDK system, then we can point you to guidance on how to add that external code.

Regards,

Nick