Questions about Commissioner and Joiner in Thread network

[Quay11]

We currently have a large Thread network and plan to configure the network using the Commissioner-Joiner form of network credential distribution.

I have a question now.

In a Thread network, the device that joins first will have priority to become a Router. When the number of Routers reaches 32, the devices that join later can only become REEDs. When the distance between the Leader/Commissioner and the new Joiner is too long to communicate directly, will the Router and REED proxy forward the Joiner's request?

In my understanding. For a REED to successfully help a Joiner connect to the Thread network, it must promote itself to a router role. But more than 32 routers is not possible.

Is there any other way to solve this problem?

[jwhui]

All active routers and router-eligible end devices (REEDs) serve as Joiner Routers when joining is enabled for the Thread partition. A REED serve as a Joiner Router without upgrading to an active router.