Add 1 year to an eligible 3+ year Infoblox Level 3 maintenance arrangement. IB-MAIN-1552-A-NS1GRID-33PLUS is an add-on service entitlement, not a standalone hardware product or a new base maintenance plan. It applies additional maintenance duration to an existing qualifying term. The service is positioned for installations that need to continue the Level 3 maintenance tier after the initial multi-year period. Its one-year duration makes it appropriate when a site requires an incremental extension rather than another full multi-year commitment. The covered product and the service scope remain tied to the associated qualifying maintenance arrangement. Select this add-on only when the existing maintenance term meets the 3+ year eligibility condition. The key distinction is its role as an extension: it adds one year of Level 3 maintenance duration and does not replace the underlying maintenance entitlement. Review the current covered-product entitlement and maintenance end date before assigning the extension to ensure the service period is applied to the intended environment.