Ping External Internet from End-Device nRF52840 DK + Raspberry Pi 3B+ on Thread Border Router

[jelalanne]

Hi,

I'm working on a structure based on a Raspi 3B+ with nRF52840 willing to connect to an IoT hub and working as a thread border router with 2 other nRF52840 connected on an Ubuntu 16.04 LTS. The main goal being the thread network working with MQTT-SN.

Following the tutorial: https://www.nordicsemi.com/DocLib/Content/SDK_Doc/Thread_SDK/v0-11-0/thread_mqttsn_example?135#thread_mqttsn_example_testing 

I have managed to ping 64:ff9b::808:808 from the End-Device serial console, ping the wpan0 IPs showing on the Raspi, and ping the End-Device IPs from the raspi.

The thing is, I want to bring the tests further and ping other IP addresses, like for example another raspi connected on the same network as my main Raspi (currently being my mobile phone shared network), but I don't know what to write, which IP to ping. (I do not really understand how all of this works, with all the prefixes and everything).

Thanks for the help.

[Edvin]

Hello,

I can recommend playing around with the Thread CLI example. Try to connect it to your network, and use the CLI commands to list all devices, ping different devices, find IP addresses and so on. This description only shows how to use a few of the commands, but openthread's github lists all of the commands, and also shows examples on how to use some of them.

Note that to connect to the network, you must use the commands to set panid and channel correct before starting the radio (using "thread start"). 

There are some useful commands:

ipaddr - lists the ip addresses of the devices in the network.

child - lists all children of a node.

router list - lists the ID of all routers

router table - lists all the routers with some more info.

router <ID> - even more info.

I hope that can give you a start of how to get familiar with the network.

Of course, let me know if you have some specific questions, or if anything is unclear.

BR,

Edvin

[jelalanne]

Thanks for replying.
I know those commands, I was more asking about understanding external internet pinging. I can ping all of my devices, from one to another, but except pinging 64:99fb::0808:0808, I don't know what to do, like how to ping a specific website or something like this. (for example ping another raspberry outside the thread network)

[Edvin]

Oh. I see. Sorry, I misunderstood your question.

Have you read through this guide:

https://www.nordicsemi.com/DocLib/Content/SDK_Doc/Thread_SDK/v0-11-0/thread_border_router?23#thread_border_router_testing

It shows how to ping different websites. It could also be used to ping your other raspberry, but you would need to know the IP address of it. 

BR,

Edvin

[jelalanne]

Thanks for taking time for me!

Yes I did read this section, I can ping google DNS without problem, but I do not have that 2000 prefix. Of what i understood, I have another one fd11:22 which can replace the 2000 one. Another thing is that the dns resolve doesnt work, I always have a timeout error.

[Edvin]

Are you sure that the sites that you try to reach supports ipv6? Or maybe your router doesn't support it?

Also, note that the dns resolve ipv4.google.com just looks up the IP address for this site (ipv4.google.com). "ipv4" is not a prefix for finding the ipv6 address of ipv4 domains. 

Did you try the following command:

dns resolve ipv4.google.com fd00:0064:0123:4567::1

What does it give? Does that also time out?