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Configuring Fixed Addresses

Owned by Sri Raghu
Last updated: Sept 12, 2024
3 min read

A fixed address represents a persistent link between an IP address and one of the following:

  • MAC address
  • Client identifier
  • Circuit ID or remote ID in the DHCP relay agent option (82)

You can configure fixed addresses for network devices, such as routers and email servers, that are not frequently moved from network to network. You can enter a specific IP address to assign to a device within a DHCP range or a subnet, or you can get the next available IP address that is free. By creating fixed addresses for network devices, clients can reliably reach them by their domain names. Some network devices, such as web or FTP servers, can benefit from having fixed addresses for this reason.

A fixed address reserves an address for a specific client. The application displays an error message if the same address appears twice in the same IP space.

To view the list of fixed addresses, complete the following:

  1. From the Infoblox Portal, click Configure > Networking > IPAM/DHCP > Address Spaces.

  2. Click IP Space > Address Block > corresponding Subnet. It displays the list of fixed addresses associated with it.

  3. The application displays the following information:

  • ADDRESS/NAME: The IP address within the subnet.
  • DESCRIPTION: Additional information about the fixed address.
  • UTILIZATION: The percentage of used IP addresses in the respective subnet range.
  • USAGE: The type of object for which this address is being configured. Identify the addresses that have FIXED ADDRESS displayed in this field.

You can click IPAM View under the Search field to toggle to the DHCP View to view all the fixed addresses and leased addresses. The DHCP view displays the following information:

  • ADDRESS: The IP address of the fixed address.
  • NAME: The fixed address name.
  • MAC ADDRESS: The MAC address for this IP.
  • CLIENT ID: The DHCP client ID defined in the "client identifier" option that was passed to the DHCP server.
  • TYPE: The type of fixed address.
  • USAGE: Displays FIXED ADDRESS. This field is hidden by default.
  • LEASE END: The timestamp when the lease ends.
  • LEASE RENEWAL: The time remaining for the lease to be renewed.

Click the column selector to reorder the columns or to select the columns to be displayed. Note that you cannot hide ADDRESS.

To get more details about the fixed address, you can click the address name to view the Relate Object page. This page displays the following objects:

  • NAME: The fixed IP address name.
  • TYPE: The object type can be IPv4 Fixed Address or Multi-home NIOS-X Server, for example. 
  • NIOS-X Server name: The name(s) of the device(s) the IP address is associated with.
  • MAC ADDRESS: The MAC Address associated with the respective IP address.
  • CLIENT ID: The unique identifier of the NIOS-X Server.
  • LEASE STARTED: The day, date, and time when the lease starts.
  • LEASE REMAINING: The number of days, hours, minutes, and seconds that remains for the lease. 

You can also perform the following on this page: 

  • Click the filter button, , to filter the objects by Users, Free, Address/Name, or IP Space. To save a filter after selecting the required parameters click Save Filter, specify a name for the filter, and click Save. To reload a previously saved filter, click the saved filters button, , and select the required filter. 
  • Click the utilization details button, , to view the utilization details or click the tabular view button, , to view the details in a tabular format.

  • On the right-hand side or at the bottom (depending on your screen width) of the page, a panel displays more details about the selected address. The details include: Type, Usage, Names, Multi-home, and Fixed Address. If you do not want to view the details in the panel, click the information button, .

  • Enter the value that you want to search in the Search text box. Universal DDI displays the list of items matching the keyword in the database. You can search by Name, Description, Tags (Tag key OR/AND Tag value), Address, MAC Address, Client ID/DUID, Type and DHCP Fingerprints. You can not search by lease start and lease remaining fields.

  • The No Entry icon,, shows that the object is disabled for DHCP protocol. 

You can perform the following actions: