Ieee8021XMkaMN
This textual convention indicates a Member Number (MN). The MN is a 32-bit value which begins at 1 and increases for each MKPDU transmitted. It is used with the MI to protect against replay attacks and to record liveliness in the Live Peers List or potential liveliness in the Potential Peers List. If the MN wraps, a new random MI value is chosen and the MN begins again at a value of 1.