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