Keep a deployed Cisco Gen 1 DNA hardware appliance under a next-business-day support service associated with DN1-HW-APL. CON-L1NBD-WSC3658E is a service ordering code, not an appliance chassis, processor, storage upgrade, or software image. Select it when the installed device requires the corresponding Cisco support coverage rather than additional compute hardware. The service is tied to the Gen 1 DNA hardware appliance family named in the ordering description. That association matters in environments where the appliance runs network-management and automation functions and the installed unit must remain eligible for hardware support. It should be matched to the appliance identity and service eligibility; it does not change the appliance’s interfaces, memory, storage, or operating software. What distinguishes this code is its next-business-day designation and its association with the original Gen 1 appliance rather than a newly supplied platform. The DN1-HW-APL platform has an end-of-life announcement, making current service eligibility and coverage continuity relevant for installed systems. Support is separate from application configuration, network connectivity, and the appliance’s operating capacity. No appliance physical dimensions or compute specifications are implied by this service code. It is intended for an existing appliance, not deployment as an edge-compute node.