This read-write PcpDEEncType object is a port-level control specifying the mode of drop-eligibility encoding within the IP Precedence bits, analogous to the PCP-bit encoding object but applied to the IP header's precedence field instead of the VLAN tag. Admins configure this when classification and drop-eligibility decisions need to be derived from Layer 3 IP Precedence markings rather than Layer 2 VLAN priority bits. For example, on a port carrying IP traffic pre-marked with IP Precedence rather than 802.1p tags, an admin would set cmEthernetNetPortIpPrecDEEncType to the matching encoding scheme so drop eligibility is correctly derived from those IP Precedence bits.