https://devzone.nordicsemi.com/f/nordic-q-a/90113/zigbee-4-2---not-bindingHello, we have a set of router devices already on the market: each of them was developed using 4.0 stack. now we&#39;re aligning the stack to the 4.2 version observing a very strange behaviour: the devices don&#39;t send any bind at startup so they are noten-USTelligent Community 13Tue, 19 Jul 2022 12:33:38 GMThttps://devzone.nordicsemi.com/thread/377624?ContentTypeID=1Tue, 19 Jul 2022 12:33:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:57fcbbc1-88d0-41e6-a7f5-6fc679568bf7Marte Myrvold<p>Hi&nbsp;Alessio,</p> <p>The devices should not be able to sleep if they are router devices. Are you certain that the role has not been changed to end device after updating?</p> <p>How did you send the bind request previously, and have you made any changes to this part?</p> <p>It would be helpful if you could get a sniffer log of the devices joining the network. Please upload the sniffer here as a pcap file. Make sure to start the sniffer before the coordinator starts the network so the sniffer has the network key, or share the network key here so I can decrypt the packets.</p> <p>Best regards,</p> <p>Marte</p><div style="clear:both;"></div>