---
title: "Reserve IP in Range"
canonical: "https://docs.infoblox.com/space/ipamvmware8x/52463091/Reserve%20IP%20in%20Range"
format: markdown
---
Use the **Reserve IP in range** workflow to allocate an IPv4 or IPv6 address within a specific DHCP address range to a virtual machine on your network. When you use this workflow, the NIOS appliance obtains the next available IP address within the defined address range and creates the specified IPAM records. A single *addHostInRange* action within this workflow allocates the next available IP address and creates a host record with the address.

The IPAM objects you can create using this workflow are:

- Host records
- A or AAAA records with or without associated PTR records
- <span style="color: #000000">CNAME records related to the created A or AAAA records</span>
- Fixed address or reservation records

Using the **Reserve IP in range** workflow, you can assign extensible attributes to the created objects.

To reserve an IP address in a network range:

1. Log in to the *VMware Aria Automation Cloud Services Console*.
2. On the **Services** tab, click **Orchestrator**.
3. In the **Dashboard** panel , expand **Library** and click **Workflows**.  
The **Workflows** folder and its contents are displayed.
4. Expand **Library** > **Infoblox**, and select **Reserve IP in range**.
5. In the top-level menu of the workflow panel, click **Run**.  
The **Reserve IP in range** panel is displayed.
6. On the <span style="color: #000000">**Connection**</span> tab, click **Connection to the IPAM server** and select the IPAM connection as follows:
  1. In the **Select InfobloxIPAM:IPAMConnection** dialog, expand **Infoblox IPAM** and select the IPAM connection.
  2. Click **Select**.
7. On the **Network range** tab, configure the following parameters:
  1. **Start address of the network range**: specify the starting address of the range.
  2. **End address of the network range**: specify the ending address of the range.
  3. **Network view**: choose the network view where the IP address range should reside.
8. On the **Common parameters** tab, define which NIOS object to create:
  - **Create host record?**: this option is enabled by default. Configure the following parameters:
    - **Host name (FQDN)**: specify the host name to use in FQDN format.
    - **Enable DNS for the created host record**: select if you want to enable DNS, and then choose the **DNS view** in which the record must reside.
    - **Enable DHCP for the created host record**: select if you want to enable DHCP in the host record.
    - **MAC address or DUID** (required when you enable DHCP for the host record): specify the MAC address or DUID for the host record.
    - **List of aliases for the host record in FQDN format**: the aliases to use for the host record.
    - **Comment**: add a description of the host record.
  - **Create DNS record?**: this option is visible only if **Create host record?** is disabled. Select **Create DNS record?** and configure the following parameters:
    - **Select DNS record to create**: choose whether to create an **A/AAAA** record or **A/AAAA/PTR** record.
    - **Host name (FQDN)**: specify the host name to use in FQDN format.
    - **DNS view**: choose the view in which the record must reside.
    - **List of aliases for CNAM records related to the created A/AAAA record in FQDN format**: you can associate CNAME records with the created A/AAAA record by setting aliases in the FQDN format. For more information, see the *Managing CNAME Records* section in the *[Infoblox NIOS Documentation](https://docs.infoblox.com/space/NIOS/35400616/NIOS)*.
  - **Create fixed address?**: this option is visible only if **Create host record?** is disabled. Select **Create fixed address?** and configure the following parameters:
    - **Select fixed address or reservation to create**: choose **Fixed address** or **Reservation**.
    - **Name of the fixed address or reservation**: specify a name for the address or reservation.
    - **IPv4 address of the Microsoft DHCP server (applicable for IPv4 fixed address only)**: specify the IP address.
    - **MAC address or DUID**: specify the MAC address or DUID if you are creating a fixed address.
    - **Comment**: add a description of the fixed address.
9. On the **Number of attributes** tab, to assign extensible attributes to the network:
  1. In the **Number of specified extensible attributes** drop-down list, choose a number.  
According to the number you chose, additional tabs are added to define the extensible attributes. For example, if you specify **2**, **Extensible attribute #1** and **Extensible attribute #2** tabs are added.
  2. On each **Extensible attribute #<*****n*****>** tab define the extensible attributes that you want to add to the network object:
    1. Click **Definition of the extensible attribute #<n>**.
    2. In the **Select Infoblox IPAM:IPAM Extensible Attribute Definition** window, expand the IPAM connection ID > **Extensible Attributes**, and select the extensible attributes.
    3. Click the **Select** button.
    4. In the **Value of the extensible attribute #<*****n*****>** field, specify a value.
10. On the **Restart DHCP service** tab, select **Perform restart of DHCP service if needed**.
11. Click **Run**.