Identification of joining devices

[Armin]

Hello,

I have a short question concerning the commissioning process.

Assuming that we have 5 Routers with the names: R1, R2, ...,R5 and one Joining device J1

1. R1 starts the commissioner with the EUI-64 and the PSKd of J1.

2. J1 starts the joining process

3. They form a DTLS connection and J1 joins the network. It now was a randomly assigned ML-EID

4. How does the devices R2 - R5 know that there is a new device in the network? Does R1 get some information about the completion of the process? At this point, is there a connection between the EUI-64 of J1 and its ML-EID or do I have to search for the EUI-64 using an application-layer implementation?

Thanks in advance,

Armin

[Jonathan Hui]

Thread devices do not maintain state about all devices attached to the network. This is an intentional design decision to support a scalable mesh while limiting the amount of memory and communication resources required to maintain a Thread network.

DNS-based service discovery is the recommended way to solve this issue. You can learn more about DNS-based service discovery in our Thread Border Router codelab. As you point out, you can also implement your own application-specific method.

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Jonathan Hui

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