cmNetPortPcpDEEncDropIneligiblePrio is a read-write PCP value that carries a given priority with an implicit drop-ineligible indication encoded into it, for frames leaving this network port. An administrator sets this so traffic considered protected is marked with a PCP value the next-hop network element will treat as safe from early discard. For example, marking aggregated committed-rate traffic leaving this trunk port with this drop-ineligible PCP value ensures peer devices do not preferentially drop it during congestion.