Logical object. This object models several Logical interface objects, each representing a different stack layer, including: {{object|Interface}}. {{object|Interface}} is a logical interface which can point to other stackable interface layers. The intention of the logical interface is to simplify the configuration management of individual {{bibref|TR-181i2}} services. Instead of configuring the individual network services with a physical interface and deal with reconfiguration problems that may arise from switching between WAN interfaces. The intention is that the network services are configured with a logical interface and that this configuration stays unchanged during the switching between WAN interfaces. The software service (For example a WAN mode manger.) responsible for handling the WAN interface changes must then only care about rewriting the LowerLayers parameter of the Logical Interface Objects. {{numentries}} Logical interface table (a stackable interface object as described in {{bibref|TR-181i2|Section 4.2}}). This table models only logical interfaces. Enables or disables the interface. This parameter is based on ''ifAdminStatus'' from {{bibref|RFC2863}}. The current operational state of the logical interface (see {{bibref|TR-181i2|Section 4.2.2}}). {{enum}} This parameter is based on ''ifOperStatus'' from {{bibref|RFC2863}}. When {{param|Enable}} is changed to {{true}} then {{param}} SHOULD change to {{enum|Up}} if and only if all the active lower layer interfaces are able to transmit and receive network traffic When {{param|Enable}} is {{false}} then {{param}} SHOULD normally be {{enum|Down}} It SHOULD change to {{enum|Unknown}} if the state of one or more of the active lower interfaces can not be determined for some reason It SHOULD change to {{enum|Dormant}} if and only if one ore more of the active lower interfaces is operable but is waiting for external actions before it can transmit and receive network traffic (and subsequently change to {{enum|Up}} if still operable when the expected actions have completed) It SHOULD remain in the {{enum|NotPresent}} state if the interface, or one or more of the active lower interfaces has missing (typically hardware) components It SHOULD change to {{enum|LowerLayerDown}} if and only if one or more of the active lower interfaces is prevented from entering the {{enum|Up}} state because one or more of the interfaces beneath it is down It SHOULD remain in the {{enum|Error}} state if there is an error or other fault condition detected with one more of the active lower layer interfaces The textual name of the logical interface as assigned by a static configuration file or dynamically by a controller. The accumulated time in {{units}} since the logical interface entered its current operational state. {{list}} {{reference|an interface object that is stacked immediately below this interface object}} See {{bibref|TR-181i2|Section 4.2.1}}. Throughput statistics for this interface. The CPE MUST reset the interface's Stats parameters (unless otherwise stated in individual object or parameter descriptions) either when the interface becomes operationally down due to a previous administrative down (i.e. the interface's {{param|#.Status}} parameter transitions to a down state after the interface is disabled) or when the interface becomes administratively up (i.e. the interface's {{param|#.Enable}} parameter transitions from {{false}} to {{true}}). Administrative and operational interface status is discussed in {{bibref|TR-181i2|section 4.2.2}}. This information SHOULD be mirrored or aggregated from the active underlying interfaces. The total number of bytes transmitted out of the interface, including framing characters. The total number of bytes received on the interface, including framing characters. The total number of packets transmitted out of the interface. The total number of packets received on the interface. The total number of outbound packets that could not be transmitted because of errors. The total number of inbound packets that contained errors preventing them from being delivered to a higher-layer protocol. The total number of packets requested for transmission which were not addressed to a multicast or broadcast address at this layer, including those that were discarded or not sent. The total number of received packets, delivered by this layer to a higher layer, which were not addressed to a multicast or broadcast address at this layer. The total number of outbound packets which were chosen to be discarded even though no errors had been detected to prevent their being transmitted. One possible reason for discarding such a packet could be to free up buffer space. The total number of inbound packets which were chosen to be discarded even though no errors had been detected to prevent their being delivered. One possible reason for discarding such a packet could be to free up buffer space. The total number of packets that higher-level protocols requested for transmission and which were addressed to a multicast address at this layer, including those that were discarded or not sent. The total number of received packets, delivered by this layer to a higher layer, which were addressed to a multicast address at this layer. The total number of packets that higher-level protocols requested for transmission and which were addressed to a broadcast address at this layer, including those that were discarded or not sent. Note that IPv6 does not define broadcast addresses, so IPv6 packets will never cause this counter to increment. The total number of received packets, delivered by this layer to a higher layer, which were addressed to a broadcast address at this layer. Note that IPv6 does not define broadcast addresses, so IPv6 packets will never cause this counter to increment. The total number of packets received via the interface which were discarded because of an unknown or unsupported protocol.