2

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.

Community
  • 1
Craig McQueen
  • 780
  • 7
  • 20
  • 1
    Nothing that I could find. But you could probably get away with using the highest numbered options. If you are really creating new DHCPv6 options, read [RFC 7227](https://tools.ietf.org/html/rfc7227) first. – Michael Hampton Jan 30 '19 at 03:21

1 Answers1

0

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:

Community
  • 1
Craig McQueen
  • 780
  • 7
  • 20