5 About Model Correction

This chapter provides SNMP to Oracle Communications Information Model correction information for the Oracle Communications Network Integrity Cisco Router and Switch SNMP cartridge.

About Model Correction

Model correction occurs when the SNMP information received through discovery from a Cisco device does not conform to the Information Model and therefore cannot be persisted as is within Network Integrity.

The Cisco Router and Switch SNMP cartridge applies the following model corrections:

• Multiple Equipment Occupying the Same Slot

• Equipment Under Physical Port

• Physical Port Under EquipmentHolder

• EquipmentHolder under EquipmentHolder

• EquipmentHolder Containing Multiple equipment

• EquipmentHolder Under Physical Port

• Multiple equipment Under Physical Port

• Naming Pattern for Artificial Entities

Multiple Equipment Occupying the Same Slot

In this scenario, multiple equipment report the same relative position within the context of the same parent. The Cisco Router and Switch SNMP cartridge applies the algorithm detailed in "About the absRelativePosition Value". No hierarchical change is required.

Equipment Under Physical Port

For a discovered Cisco device hierarchy, such as the following:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment
                                 Physical Port
                                       Equipment-Card

the Cisco Router and Switch SNMP cartridge converts the PhysicalPort to an EquipmentHolder as follows:

     Physical Devices
            Equipment-Shelf
                  EquipmentHolder
                            Equipment
                                EquipmentHolder 
                                         Equipment-Card

Physical Port Under EquipmentHolder

For a discovered Cisco device hierarchy, such as the following:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Physical Port

the Cisco Router and Switch SNMP cartridge inserts an artificial Equipment entity between the EquipmentHolder and the PhysicalPort as follows:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment 
                                   Physical Port

EquipmentHolder under EquipmentHolder

For a discovered Cisco device hierarchy, such as the following:

     Physical Device
            Equipment-Shelf
                    EquipmentHolder
                            EquipmentHolder

the Cisco Router and Switch SNMP cartridge inserts an artificial Equipment entity between the two EquipmentHolders as follows:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment
                                   EquipmentHolder

EquipmentHolder Containing Multiple equipment

For a discovered Cisco device hierarchy, such as the following:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment
                            Equipment

the Cisco Router and Switch SNMP cartridge inserts an artificial Equipment entity as the parent to the two equipment as follows:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment 
                                    Equipment
                                    Equipment

EquipmentHolder Under Physical Port

For a discovered Cisco device hierarchy, such as the following:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment
                                Physical Port
                                    EquipmentHolder

the Cisco Router and Switch SNMP cartridge converts the Physical Port to an Equipment as follows:

     Physical Devices
            Equipment-Shelf
                  EquipmentHolder
                            Equipment
                                Equipment
                                    EquipmentHolder

Multiple equipment Under Physical Port

For a discovered Cisco device hierarchy, such as the following:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment-Card
                                Physical Port
                                    Equipment
                                    Equipment

the Cisco Router and Switch SNMP cartridge first converts the Physical Port to an EquipmentHolder, then inserts an artificial Equipment between the EquipmentHolder and the Equipment as follows:

     Physical Device
            Equipment-Shelf
                  EquipmentHolder
                            Equipment-Card
                                EquipmentHolder
                                    Equipment 
                                         Equipment
                                         Equipment

Naming Pattern for Artificial Entities

Naming pattern for artificial entities are introduced through model corrections.

The following example shows the EquipmentHolder naming pattern.

EquipmentHolder-Artificial::entPhysicalParentRelPos

The following example shows the Equipment naming pattern.

Equipment-Artificial::entPhysicalParentRelPos