CC2530 router runs for a long time, with 30 routers in the entire network. One of the routers is unable to communicate with the coordinator, and when it sends data to the coordinator or when the coordinator sends data to it, it generates an 0xCD error.
Using the Sniff tool to grab data, it was found that before sending data to the coordinator, a Router Request was issued, and the coordinator replied with a Router Reply. When the coordinator sends a Router Request to it, it does not reply with a Router Reply. And it no longer broadcasts Link Status periodically.
I read out the routing table of the faulty CC2530 and found that it was all empty.