Issues with adding and using DHCPv6 "Predefined Options" on Windows Server 2019

Question

I want define option59 and option16 for network boot.
But when I use " set predefined options" to add a "DHCP Standard Options", It's not work
I click "add" and type "name","code","description", select "data type", then I click "OK"
Nothing happened, no option was added. I do this again then give me an error "The given option identifier is already in use"
Did I miss some thing?
How to add options for DHCPv6 on Windows Server 2019?
Thanks

Answer 1

Hi @Charles

The "Vendor Class ID" and "Bootfile Name" options in IPv6 can be added manually in the pre-defined options with Option Code 16(Vendor Class ID) and 59(Bootfile Name). Maybe you are missing some pre-setup which is giving you the error message "The given option identifier is already in use".

You can follow the steps as per this thread and try to add options for DHCPv6 on Windows Server 2019
https://learn.microsoft.com/en-us/answers/questions/172999/how-to-use-windows-server-2016-dhcpv6-server-to-se.html

Just for your understanding, Predefined options are the option codes defined in RFC 3315. You cannot redefine these options or delete them from the DHCP option space. Option codes 1-48 are reserved and cannot be used to define custom options.

Custom options are option codes 49 to 254. They are not defined by IETF standards and are available for private use. You can use these option codes to provide configuration or service information that none of the predefined options provide.

Hope this resolves your Query!!

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