The SMF Interface Table describes the SMF interfaces that are participating in the SMF packet forwarding process. The ifIndex is from the interfaces group defined in the Interfaces Group MIB module (RFC 2863). As such, this table 'sparse augments' the ifTable specifically when SMF is to be configured to operate over this interface. A conceptual row in this table exists if and only if either a manager has explicitly created the row or there is an interface on the managed device that automatically supports and runs SMF as part of the device's initialization process. The manager creates a row in this table by setting the rowStatus to 'createAndGo' or 'createAndWait'. Row objects having associated DEFVAL clauses are automatically defined by the agent with these values during row creation, unless the manager explicitly defines these object values during the row creation. As the smfCfgInterfaceTable sparsely augments the IfTable. Hence, + an entry cannot exist in smfCfgInterfaceTable without a corresponding entry in the ifTable. + if an entry in the ifTable is removed, the corresponding entry (if it exists) in the smfCfgInterfaceTable MUST be removed. + the smfCfgIfStatus can have a value of 'enabled' or 'disabled' independent of the current value of the ifAdminStatus of the corresponding entry in the ifTable. The values of the objects smfCfgAdminStatus and smfCfgIfAdminStatus reflect the up-down status of the SMF process running on the device and on the specific interfaces, respectively. Hence, + the value of the smfCfgAdminStatus can be 'enabled' or 'disabled' reflecting the current running status of the SMF process on the device. + the value of the smfCfgIfAdminStatus can be 'enabled' or 'disabled' if the value of the smfCfgAdminStatus is set to 'enabled'. + if the value of the smfCfgAdminStatus is 'disabled', then the corresponding smfCfgIfAdminStatus objects MUST be set to 'disabled' in the smfCfgInterfaceTable. + once the value of the smfCfgAdminStatus changes from 'disabled' to 'enabled', it is up to the management system to make the corresponding changes to the smfCfgIfAdminStatus values back to 'enabled'.