Maintain the support position of an Infoblox IB-4030-10GE-DCAG appliance through a one-year ISP Level 3+ maintenance term. IB-MAIN4030-10GEDCAGRDT3AC-S21 is a service entitlement associated with that specific appliance designation, rather than an appliance or expansion component. It adds a defined maintenance period for systems already deployed on the covered platform. The service carries an ISP Level 3+ classification. That classification is significant when matching an installed system to the intended Infoblox maintenance tier: both the one-year term and the L3+ designation are part of the service identity. Associate the entitlement with the IB-4030-10GE-DCAG platform so that the support coverage aligns with the appliance architecture already in operation. This offering is differentiated by its explicit platform association and annual service duration. It is intended for the 4030 configuration identified as 10GE DCAG, making the covered appliance designation an important selection point. Use it where an existing Infoblox appliance requires continuation of maintenance coverage at the ISP Level 3+ service classification, without changing the appliance hardware configuration.