A count of the number of times a REGISTER MPCP frames
reception occurs. A single counter at the ONU and a set
of counters, one for each LLID, at the OLT. Increment
the counter by one for each REGISTER MPCP frame
received, for each LLID, as defined in [802.3ah] clause
64. This counter is mandatory for an ONU and for an OLT.
at the OLT the value should be zero.