---
title: "Creating Fixed Addresses"
canonical: "https://docs.infoblox.com/space/BloxOneDDI/186714586/Creating%20Fixed%20Addresses"
format: markdown
---
<span style="color: #000000">To create a fixed address, complete the following:</span>

1. In the Infoblox Portal, click **Configure > Networking > IPAM > Address Spaces**.
2. Click **IP Space > Address Block >** corresponding** IPv4 Subnet or IPv6 Subnet**.
3. On the **Subnet** page, click the **Create** drop-down list **> Fixed Address.**
4. On the **Create Fixed Address** page, specify the following:
  - **IP Space**: The respective IP space is automatically selected, in which the fixed address exists.
  - **Subnet**: The respective subnet is automatically selected.
  - **IP Address**: Enter an IPv4 address to be used as a fixed address. Or click the **Get next available** checkbox to automatically receive the next available IP address from the respective subnet. The next available IP address appears automatically after you click **Save & Close**. The **Get next available** checkbox is not applicable to IPv6.
  - **Assign by**: Indicates how the client must be matched. For client and relay formats, you can specify the value in hexadecimal or text format.
  - For IPv4 networks:
  - 
    - **Client (hex)**: Select this option from the drop-down list to assign a dynamic IP address to a NIOS-X Server with the same DHCP client identifier that you specify here. The client identifier for the requesting NIOS-X Server and the client identifier stored in Universal DDI must match.
    - **Client (text)**: Select this option from the drop-down list to assign a dynamic IP address to a NIOS-X Server with the same DHCP client identifier that you specify here. The client identifier for the requesting NIOS-X Server and the client identifier stored in Universal DDI must match.
    - **MAC Address**: Select this option from the drop-down list to assign a dynamic IP address to a NIOS-X Server, provided that the MAC address of the requesting NIOS-X Server matches the MAC address that you specify here.
    - **Relay (hex)**: Select this option from the drop-down list to match the circuit ID or remote ID in the DHCP relay agent option (82). You can enter the ID in hexadecimal format, such as aa, ab, 1f:cd, ef:23:56, ef-23-56, or ef2356.
    - **Relay (text)**: Select this option from the drop-down list to match the circuit ID or remote ID in the DHCP relay agent option (82). You can enter the ID in string format, such as abcd or aa:gg.
  - For IPv6 networks:
    - **MAC Address**: Select this option from the drop-down list to assign a dynamic IP address to a NIOS-X Server, provided that the MAC address of the requesting NIOS-X Server matches the MAC address that you specify here.
    - **DUID**: Select this option from the drop-down list to assign a DUID to a NIOS-X Server.
  - **Client/MAC Address/Relay**: Depending on what you choose in the **Assign by** drop-down menu, this field will change accordingly. If you choose **Client (hex)** or **Client (text)**, enter a valid client identifier. If you choose **MAC address**, enter a valid MAC address. If you choose **Relay (hex)** or **Relay (text)**, enter a valid relay agent circuit ID. This is not applicable to IPv6.
  - **Name**: Enter a name for the fixed address (recommended).
  - **Description**: Enter additional information about the fixed address (optional).
  - <span style="color: #003300">**Disable for DHCP Protocol**</span><span style="color: #003300">: Select the check box to stop the DHCP server from offering this address. </span>
  - <span style="color: #333300">**Tags**</span><span style="color: #333300">: Assign tags to single or multiple fixed addresses. The tags assigned to IP addresses and their fixed addresses are now synced with each other. For information about tags, see </span><u><span style="color: #333300">*[Managing Tags](https://infoblox-docs.atlassian.net/wiki/spaces/BloxOneCloudDraft/pages/9537990)*</span></u><span style="color: #333300">.</span>
  - DHCP Configuration: Configure the following DHCP Options:
    - **Type**: Choose **Option Space** or **Option Group**.
    - **Space**: Choose the space.
    - **Name**: Choose the name.
    - **Option Type**: Option Type is shown automatically.
    - **Value**: Specify the value.
    - **Inherited From**: Shows the parent.   
Select the **Block all inherited options** checkbox if you want to block all the options inherited from the parent.
5. Click **Save & Close** to save the fixed address, or click **Cancel** to exit.


> ⚠️ **Note**
> ⚠️ 
> ⚠️ <span style="color: #000000">If you do not enter all the required fields, an error message appears at the top of the </span><span style="color: #000000">**Create Fixed Address**</span><span style="color: #000000"> page. You must fill in all required fields in order to save the fixed address.</span>