Configuring DHCP Subnet Profiles

A DHCP subnet profile contains all the settings required required for a particular subnet.  A DHCP subnet profile is applied to a particular subnet. All configuration settings are inherited from the Global DHCP Configuration into the DHCP subnet profile by default. If there are no changes made to the DHCP subnet profile, it would be an exact copy of the Global DHCP Configuration. For more information, see Global DHCP Configuration. 

However, in some instances, you may need to configure settings that are different from the Global DHCP Configuration. In such instances, you can override the values inherited into the DHCP subnet profile. There are only two configurations available for inheritance in the DHCP subnet profile: 

• Inherit - this is the default setting. The values for the particular setting exactly matches the value provided in the Global DHCP Configuration. 

• Override - you can toggle the configuration to Override and provide alternate values.  Use this setting when you want to provide a value for a setting that is different from the one specified in Global DHCP Configuration. 

The DHCP subnet profile is applied locally to one or more subnets. The DHCP subnet profile contains all the settings required for the particular subnet. For example, an organization creates a Global DHCP Configuration at the head office. The branch office can deploy a DHCP server ( service instance) and inherit values from the Global DHCP Configuration. For settings unique to the particular branch office, the organization creates a DHCP subnet profile to override settings in the Global DHCP Configuration and apply it to the required subnets. The following diagram shows the stage at which the DHCP subnet profile is configured:

An organization may need to configure different values in the Global DHCP Configuration and DHCP config profile. For example, an organization may have long lease times for desktops, laptops, and printers. However, IoT devices like air quality monitoring, electrical panel monitoring, and leak monitoring systems may have short lease times. Although the Global DHCP properties have longer lease times, the DHCP Config profile may need to be configured with shorter lease times. The DHCP Config profile is applied to the service instance that manages the IoT devices. The DHCP config profile and the Global DNS properties are applied together as shown in the diagram:

To view the list of DHCP config profiles: 

1. From the Infoblox Portal, click Configure > Networking > IPAM/DHCP > DHCP Config Profiles.

2. The application displays the following information for each DHCP Subnet Profile:

• NAME: Displays the name of the DHCP Subnet Profile.

• DESCRIPTION: Displays additional information about the DHCP Subnet Profile.

• TYPE: Shows if this is a DHCP Subnet Profile or DHCP Config Profile.

• SUBNETS ASSIGNED: Displays the service instances that are associated with the DHCP server in the Info panel.

You can also do the following in this tab:

• Click the menu button, , to reorder the columns.

• Click the menu button, , then Edit, or select the check box for the respective record and click the Edit button to modify a DHCP Subnet Profile.

• Select a DHCP Subnet Profile to view the details. You can view details like description, leases, DHCP options, DDNS, and tags associated with it on the right panel. If you do not want to view the details in the right panel, click the information button, .

• Enter the value that you want to search in the Search text box. The application displays the list of records matching the keyword in the text box.

• Click the filter button, , to filter the objects by name, description and tags. 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 menu button, , then Move to Recycle Bin to move the object to the recycle bin. You can restore the object later or delete it permanently as required. For more information, see Recycle Bin.

You can perform the following actions: