Apparently, Config AppKey Update message can be transmitted in the key refresh procedure. However, one point let me very confused, I looked into the Mesh Spec v1.0.1 (page 127)and it shows me as following below:
The Config AppKey Update message shall generate an error when node is in normal operation, Phase 2, or Phase 3 or in Phase 1 when the Config AppKey Update message on a valid AppKeyIndex when the AppKey value is different.
Based on the information above, it seems that it shall generate an error when node is in normal operation,phase 1/2/3. But the section 3.10.4.1 Phase 1 –distribution of the new keys shows me as shown as below:
The Configuration Client shall send the new keys to each node that is not blacklisted. New keys are distributed using the Config NetKey Update message and the Config AppKey Update message
so these two information make me more confused, if this is the typoes on the specification?
thanks in advance.