Inquiry Regarding Integration of Kea DHCP with DOCSIS Cable Modem DHCP Requests

[Darren Ankney]

Hi Fernando,

You may want to ask this question on the kea-users mailing list
instead (https://lists.isc.org/mailman/listinfo/kea-users) and I'll be
happy to give you some suggestions there. I'd just like to make sure
that, in the future, should someone have a similar question, that they
will be able to find the information since it would be in the
kea-users list.

Thank you,

Darren Ankney

On Wed, Nov 29, 2023 at 2:24 PM Fernando R. Soto <frsoto at gmail.com> wrote:
>
> Dear ISC Support Team,
>
>
>
> I hope this email finds you well. I am reaching out to seek guidance on integrating Kea DHCP with DHCP requests originating from DOCSIS cable modems.
>
>
>
> My inquiry revolves around configuring the DHCP Server to, upon receiving a DHCP Discover and detecting that it originates from a cable modem, utilize the client-class option as follows:
>
> "client-classes": [
>
>     {
>
>         "name": "Cablemodem",
>
>         "test": "substring(option[60].hex, 0, 6) == 'docsis'",
>
>         "next-server": "192.168.10.43",
>
>         "boot-file-name": "default.bin"
>
>     }
>
> ],
>
>
>
> The goal is for Kea DHCP, in responding to the boot-file-name, to execute a query against an SQL table. This query would seek the MAC address of the cable modem, present in both the Client MAC address field ("ARRISGro_4c:d4:a2" or "98:6b:3d:4c:d4:a2") and option 82 ("Agent Information Option"). If the MAC is found in the table, it would fetch the corresponding value from the boot-file field. If no match is found, the response would default to "default.bin".
>
>
>
> I would appreciate any guidance or suggestions you can provide to achieve this scenario.
>
>
>
> Thank you in advance for your time and assistance.
>
>
>
> Best regards,
>
>
>
>
>
> --
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>
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