Support a Cisco ACI data-center configuration with the fixed add-on designated by E2N-N9K-NDBXF-G. The product description associates this item with ACI and the N9K/NDBXF naming context, making the full ordering code the key identifier when matching a required Cisco configuration. It is categorized for the data-center environment. The fixed add-on designation is the central distinction for this item. It identifies a configuration-specific Cisco component rather than a port-count-defined data-center switch. No Ethernet port, optic, power, rack, or chassis specification is conveyed by its designation, so those characteristics should not be assumed from the data-center category alone. Use the exact code where an ACI configuration references the N9K-NDBXF-G designation. Retaining the hyphenated form is important when searching configuration records and Cisco-oriented data-center documentation; E2NN9KNDBXFG is the corresponding compact searchable form. The item is most relevant where ACI functionality and a fixed-add-on designation are both explicit requirements, instead of deployments selecting hardware by interface type, forwarding capacity, or physical rack dimensions.