Keep a Cisco Nexus 5548 UP chassis under the support coverage associated with this service SKU. The covered chassis configuration has 32 10 GbE ports and uses two power supplies plus two fan modules. That profile fits aggregation and access roles where dense 10 GbE server, storage, or upstream network connectivity is concentrated in a single data-center switch. CON-L1NBD-MASR1KAG is a Cisco support-service ordering code associated with that Nexus 5548 UP chassis configuration, rather than a switch chassis shipment. Its NBD designation identifies a next-business-day service class, helping operations teams maintain a defined support path for installed infrastructure. It should be matched to the chassis requiring coverage and its applicable Cisco service entitlement. The association with the 32-port, dual-power-supply, dual-fan chassis is the key distinction for this service entry. It addresses the specific hardware configuration named here, not a generic Ethernet-switch support requirement. Use it where the installed Nexus chassis has the stated port density and field-replaceable power and cooling arrangement, and where next-business-day service coverage aligns with site recovery objectives.