6.3.1.2 Distributed Network Formation by Zigbee Router/Extended Light

Zigbee routers can form distributed networks. After successfully forming the distributed network, broadcast the device announcement packets and permit join requests to notify other routers/end devices that are searching for a network to join. After sending the end device/router a beacon request, the parent router responds with beacon frame, which leads to MAC association. After successful MAC association, the end device/router joins the network. The link key is communicated between the parent router and the end device/router through transport key for security purpose. For more details, refer to 6.1.2 Network Security Models.