Issue link: https://read.uberflip.com/i/1428395
LoRaWAN ® L2 1.0.4 Specification © 2020 LoRa Alliance ® Page 26 of 90 The authors reserve the right to change specifications without notice. 5 MAC Commands 813 For network administration, a set of MAC commands may be exchanged exclusively between 814 a Network Server and the MAC layer of an end-device. MAC layer commands are never visible 815 to the Application Server, nor to the application running on the end-device. 816 A single data frame MAY contain any sequence of MAC commands, either piggybacked in the 817 FOpts field or, when sent as a separate data frame, in the FRMPayload field with the 818 FPort field set to 0. Piggybacked MAC commands SHALL always be sent without encryption 819 and SHALL NOT exceed 15 octets. MAC commands sent as FRMPayload SHALL always 820 be encrypted and SHALL NOT exceed the maximum FRMPayload length. 821 822 Note: MAC commands whose content shall be encrypted must be sent 823 in the FRMPayload of a separate data frame. 824 825 A MAC command consists of a command identifier (CID) of 1 octet followed by a possibly 826 empty command-specific sequence of octets. 827 828