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Craig McQueen
Asked: 2019-01-30 19:05:01 +0800 CST

Is there a DHCPv6 equivalent of DHCPv4's private-use options?

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DHCPv4 allows for custom information to be provided to network devices, using "private-use" options. The IANA registry of DHCP parameters reserves option numbers 224 to 254 for private use.

Does DHCPv6 have an equivalent of DHCPv4's private-use options? I can't see any in the IANA registry of DHCPv6 parameters.

I found a draft Site Specific Options for DHCP for IPv6 which proposes site-specific options, but says they must not be used for vendor-specific options.

One possible usage scenario is, I'm interested in making a network device which can automatically get a server address for a custom IP protocol. So the DHCPv4 private-use option seemed like a possible avenue for the device to request the server address, and the DHCP server to provide it.

dhcpv6

1 Answers

  1. Best Answer

    After investigating this further myself...

    It would be better to use vendor-specific options rather than private-use options. (Eg I'm interested in making a network device which can query the DHCP server for a server address for a custom IP protocol.)

    For DHCPv4:

    For DHCPv6:

    For many DHCPv4 and DHCPv6 servers, it is most likely necessary to configure the option by specifying it as a binary data string, entering the data as hex digits. I found the following configuration examples:

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