Keep an installed Infoblox ND-2200-NIGRID-DC DC appliance under a Level 3+ ISP maintenance term for 1 year. This service ordering code ties the stated coverage period and support tier to that named appliance platform. It is a maintenance entitlement rather than an appliance, extending service coverage for existing hardware without changing the deployed platform configuration. Level 3+ identifies the support tier attached to this maintenance term. Select this service where the installed equipment is specifically the ND-2200-NIGRID-DC DC appliance and the required coverage period is 1 year. Matching the maintenance entitlement to the appliance designation matters because service coverage is associated with the supported platform, rather than being a general-purpose service for unrelated hardware. ND-MAIN-2200-NIGRID-DC-I21 distinguishes this maintenance option through its Infoblox Support Program designation, Level 3+ tier, 1 year term, and explicit association with the ND-2200-NIGRID-DC. It fits installations retaining that appliance in service where the applicable maintenance tier must remain aligned with the deployed hardware. The service code provides a defined annual coverage term for the named DC appliance rather than a replacement hardware component.