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To control how BloxOne DDI allocates IPv4 addresses, you can define DHCP filters and apply them to the Global DHCP Configuration. You can also apply DHCP filters to address space, network, and subnets. For more information on creating the filters see Creating IPv4 Hardware Filters and Creating IPv4 Option Filters

The DHCP filters from the Global DHCP Configuration are inherited based on the following hierarchy: DHCP Config Profiles > Option Groups > Address Spaces > Subnets. You can optionally override the settings for filters at each level and select a different filter than the one specified for its parent. 

Depending on your configuration, DHCP filters screen requesting clients by matching hardware names or DHCP options you define in the filters.

When you define DHCP filters, you classify DHCP clients based on the information provided by the clients. When you apply filters to an address range, the application responds to your address requests based on your configuration. The application also decides which DHCP options to return to the matching clients based on how you apply the filters.  

To configure DHCP filters, complete the following:

  1. From the Cloud Services Portal, click Manage -> IPAM/DHCP -> Global DHCP Configuration.
  2. On the Global DHCP Configuration page, click Filters -> Add to add a DHCP filter to the list or click Remove to delete the entry.
    • Filter Name: Select a value from the drop-down list. Select Hardware Name to select hardware filters or MAC addresses and Option Name to define option filters.  
    • Filter Type: Displays the filter type based on the filter name you select.
  3. Click Save & Close to save the details or click Cancel to exit.

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