---
title: "DNS Cache Acceleration Appliance System Configuration"
canonical: "https://docs.infoblox.com/space/DAAG/10748064/DNS%20Cache%20Acceleration%20Appliance%20System%20Configuration"
format: markdown
---
> ⚠️ **Note**
> ⚠️ 
> ⚠️ From NIOS 9.0 onwards, IB-4030 and IB-4030-10GE appliances are not supported.  
> ⚠️ <span style="color: #333333">Similar features and functionalities are available on software-based DNS Cache Acceleration appliances, and it is recommended to use the software-based DCA supported appliances. For a list of supported appliances, see as described in </span>[*<span style="color: #333333">Supported DNS Cache Acceleration Appliances</span>*](https://infoblox-docs.atlassian.net/wiki/spaces/DAAG/pages/10747938)<span style="color: #333333">.</span>

For initial hardware setup instructions, refer to the NIOS Documentation at [*<span style="color: #0000ff">docs.infoblox.com</span>*](https://docs.infoblox.com). Once you install the system and run the **set** **network** command, you enable the DNS service and the DNS Cache Acceleration service on the DNS Cache Acceleration appliances.  
The procedure to start DNS Cache Acceleration service consists of the following:

1. Install and activate the DNS Cache Acceleration license, as described in <span style="color: #003300">Licensing Requirements below.</span>
2. Enable the DNS service and the DNS Cache Acceleration service, as described in enabling the DNS cache acceleration service and enabling the DNS service, see  [*<span style="color: #0000ff">Configuring DNS Cache Acceleration</span>*](https://infoblox-docs.atlassian.net/wiki/spaces/DAAG/pages/10748069).

# Licensing Requirements

The DNS Cache Acceleration appliance require a **DNS** **Cache** **Acceleration** license. The IB-4030 and IB-4030-10GE support four tiers of **DNS** **Cache** **Acceleration** licenses. These licenses enable DNS caching and control DNS queries per second performance on the appliance. The Tier-4, Tier-3,  and Tier-2 licenses enable the appliance to process up to 150K, 300K and 600K qps (queries per second) respectively. The Tier-1 license enables the appliance to perform at its full capacity.

You can install either a temporary or a permanent license on the appliance. The temporary license provides a 60 days free trial for up to one million queries per second. You can upgrade a temporary license to any of the permanent **DNS** **Cache** **Acceleration** license on the appliance using either Grid Manager or the CLI.

> ⚠️ A lower tier license cannot be added for DNS cache acceleration when a higher tier permanent license is installed. You can add a lower tier license if a temporary license exists. You cannot downgrade any permanent DNS cache acceleration license from a higher tier license to a lower tier license. For more information about the different tier licenses, contact your Infoblox representative.  
> ⚠️ The appliance displays a warning message if the DNS cache acceleration utilization exceeds a predefined threshold. You can configure the appliance for various levels of performance based on your current license type.
> ⚠️ 
> ⚠️ Tiered licenses are supported only on IB-40x5 appliances. Other software-based appliances are enabled to perform at their full capacity.

The system restarts automatically when you install the license or upgrade it to a higher tier. For more information about adding and upgrading licenses through Grid Manager, see the NIOS Documentation at [<span style="color: #0000ff">*docs.infoblox.com*</span>](http://docs.infoblox.com/)<span style="color: #091e42">*.*</span>

You can also use the CLI command `set license` to apply a permanent license or the `set temp_license` command to add a temporary license. For more information about the CLI command, see [*<span style="color: #0000ff">DNS Cache Acceleration CLI Commands</span>*](https://infoblox-docs.atlassian.net/wiki/spaces/DAAG/pages/10748010).

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