An entry in the table of ports on boards with redundancy capability. Entries in the table cannot be created or deleted via SNMP. Row modification via SNMP is allowed only for ports that support either hardware or software redundancy, but the amount of modifications between the two varies. Entries for boards that support hardware-redundancy only allow the objects s3EnetRedPortRedundMode, s3EnetRedPortSwitchoverStatus, and s3EnetRedPortSwitchoverTime to be modified. The object s3EnetRedPortRedundMode can only be modified on certain agent versions (see the description of the object for more details). Entries for boards that support software-redundancy allow the objects s3EnetRedPortRedundMode, s3EnetRedPortCompanionSlotNo, s3EnetRedPortCompanionPortNo, s3EnetRedPortSwitchoverStatus, and s3EnetRedPortSwitchoverTime to be modified. Software-redundant pairs are configured by sending the objects s3EnetRedPortRedundMode, s3EnetRedPortCompanionSlotNo, and s3EnetRedPortCompanionPortNo in the same SNMP SET PDU, with the object s3EnetRedPortRedundMode set to the value of swActive(4) or swStandby(5). When changing an existing software-redundant pair, the existing pair must first be broken up by setting the object s3EnetRedPortRedundMode to standalone(1), and then a new pair must be configured as described above.