Creating Option Filters

To create an IPv4 option filter:

1. From the Infoblox Portal, click Configure > Networking > IPAM/DHCP >  Filters > Create Option Filter, and select IPv4 Option Filter or IPv6 Option Filter from the drop-down list.

2. On the Create Option Filter page, specify the following:
   

   • Name: Enter a meaningful name for the option filter. For example, you can enter Linux if you plan to use this option filter to screen Linux systems. If you want to specify option settings in the filter, the filter name must be unique among all option filters.
   • Description: Enter additional information about the filter.
   • Tags: For information about tags, see Managing Tags.
     

   • In the Rules panel, select Any or All from the Match drop-down list to match any rule or all rules in the list. Click Add to add a DHCP option rule to the list or click Remove to delete the entry:

     • CODE: Click the down arrow and select an option space from the drop-down list. The selected option space contains the corresponding DHCP options that you can use as filter criteria.

   • • OPERATOR: Click the down arrow and from the drop-down list, select an operator. If you select Equals or Not Equals, enter the value of the selected option you want the filter to match in the field.

     • VALUE: Enter the match value that you want the filter to use for the selected DHCP option. 

     • OFFSET: Enter the number of characters at which the match value substring starts in the option data. Enter 0 to start at the beginning of the option data, enter 1 for the second position, and so on. For example, when you enter 2 and have a match value of MSFT, the appliance matches the value MSFT starting at the third character of the option data. 
            To add more options to the filter, click Add and repeat the steps.
   • Lease Time: Enter the lease time and select the time unit from the drop-down list. The maximum lease time allowed is 5 years. Universal DDI will now automatically convert imported unlimited DHCP lease times to the maximum supported by the systems, which is 5 years.

   • In the DHCP Options panel, complete the following to define which DHCP options to return to the matching client:

     • Type: Select Option or Option Group based on what you want to add to the list.

     • Space: Select a value from the drop-down list. The list displays either option spaces or option groups based on the Type you select.

     • Name: Select a value from the drop-down list. The list displays names of the option spaces or option groups based on the Space you select.

     • Option Type: Displays the option type.

     • Value: Enter the match value that you want the filter to use for the selected DHCP option. 
       To add more options to the filter, click Add and repeat the steps.

3. Configure the Header Options. To obtain the configuration, some devices use one or more of the following fields in the DHCPv4 packet: next-server, server-NIOS-X Server name, and boot-file-name. This setting is only available for IPv4 option filters. Configure the following:
   • Server Name: Specify the server's NIOS-X Server name, which can be up to 64 bytes long.
   • File Name: Specify the configuration file's name, which can be up to 128 bytes long.
   • Server Address:  Specify the IPv4 address.
4. Configure the Vendor Encapsulated Option Space. This setting is only available for IPv4 option filters. The vendor encapsulated option space is available, which is option 43. 
   • Option Space (43): You can specify the hexadecimal value while creating the option space or create an encapsulated option space.  
     • Hexadecimal in an Option Space: For Type, select Option. For Space, select the option space you have created. For more information on option spaces, see Creating Option Spaces. Create an option space with Type as hexadecimal. If you choose the Option Type as hexadecimal, specify the value as aa:bb:cc, aa-bb-cc, or aabbcc.

5. Click Save & Close to save the details or click Cancel to exit.