The following figure shows the front of the Cisco Catalyst 9800-80 Wireless Controller.

Two power supplies (AC or DC) are accessed from the front of the controller and are hot-swappable.

Warning

Never install an AC power module and a DC power module in the same chassis. Statement 1050

The following figure shows the rear of the Cisco Catalyst 9800-80 Wireless Controller.

The chassis has a front-to-rear airflow. Four internal fans draw cooling air in through the front of the chassis and across internal components to maintain an acceptable operating temperature. The fans are located at the rear of the chassis. The fans are numbered from 0 to 3, right to left.

Caution

The power supplies used in Cisco Catalyst 9800-80 Wireless Controllers are different and they should not be mixed or swapped. The size and structural dimensions are the same, therefore they both look alike. It would be hazardous, if you accidentally inserted the wrong power supply into the PEM slot.

The Unique Device Identifier (UDI) is the Cisco product identification standard for hardware products. A product identification standard removes barriers to enterprise automation and can help you reduce operating expenses.

The UDI provides a consistent electronic, physical, and associated business-to-business information product identification standard.

The UDI is a combination of five data elements. The following table lists the UDI elements.

The combination of serial number and product ID (PID) is unique and consistent across all Cisco products. The PID that is coded on hardware is called a base product identifier.

Additional orderable PIDs can be associated to a base PID. For instance, an orderable PID may describe a packaging configuration for a product or a bundled group of products sold, tested, and shipped together. Specific unique device identifier (UDI) benefits include the following:

• Identifies:

  • Individual Cisco products in your networks

  • PIDs and serial numbers for service and replaceable products

  • Version IDs (VIDs) for product version visibility

• Facilitates discovery of products subject to recall or upgrade

• Enhances inventory automation of Cisco products

The Cisco product identification standard provides the following features:

• Version visibility—Cisco continuously improves products through feature additions. Product changes are indicated by incrementing the VID, which provides version visibility to help you understand and manage product changes. VID management ensures consistency of changes from product to product.

• Operating expense reduction—Cisco UDIs provide accurate and detailed network inventory information; identifying each Cisco product in a network element through a standard interface. Cisco operating systems can view and use this data, allowing you to automate your electronic inventory.

• Consistency across product layers—The UDIs are embedded in the hardware products and cannot be overwritten. Operating and management systems discover UDIs through standard interfaces and display UDIs in standard outputs. Standard interfaces include the IETF standard ENTITY-MIB.

show diag chassis eeprom detail Command

The show diag chassis eeprom command displays the PID, VID, PCB serial number, hardware revision, and other such information.

The following is sample output from the show diag chassis eeprom command:

WLC# show diag chassis eeprom
MIDPLANE EEPROM data:

        Product Identifier (PID) : C9800-80-K9
        Version Identifier (VID) : V01
        PCB Serial Number        : xxxxxxxxxx
        Top Assy. Part Number    : 68-8888-68
        Hardware Revision        : 0.2
        Asset ID                 :
        CLEI Code                : UNASSIGNED
Power/Fan Module P0 EEPROM data:

        Product Identifier (PID) : C9800-AC-750W
        Version Identifier (VID) : V01
        PCB Serial Number        : xxxxxxxxxx
        Hardware Revision        : 1.0
        Asset ID                 :
        CLEI Code                : xxxxxxxxxx
Power/Fan Module P1 EEPROM data is not initialized

Note	Common Language Equipment Identification (CLEI) code is a ten-digit character code that identifies a specific product. A CLEI code is applied to each part within a Cisco Catalyst 9800-80 Wireless Controller as they are programmed in manufacturing for shipment to customers.

show license udi Command

The show license udi command displays UDI information.

The following is sample output from the show license udi command:

WLC# show license udi
SlotID   PID                    SN                      UDI
--------------------------------------------------------------------------------
*        C9800-80-K9         xxxxxxxxxx         C9800-80-K9:xxxxxxxxxx

Note	For complete information on the product identification standard, see https://www.cisco.com/c/en/us/products/unique-device-identifier-udi.html.