Each row entry represents an Ethernet port on a IOM card in a chassis in the system. Entries cannot be created and deleted via SNMP SET operations. Before an IOM cardEntry can be deleted from the tmnxMDATable, its supported tnPortEntries and tnPortEtherEntries must be in the proper state for removal. The tnPortEtherEntry contains attributes that are unique to the Ethernet TmnxPortType.