[dhcwg] Request for review: draft-drew-dhc-v4-routed-prefix-00

[Brendon Drew <[e-mail]>]

Hi all,

I've recently submitted an individual Internet-Draft, draft-drew-dhc-v4-routed-prefix-00, defining a DHCPv4 option for communicating IPv4 prefixes that are routed toward the requesting router.

The draft is here: https://datatracker.ietf.org/doc/draft-drew-dhc-v4-routed-prefix/

The motivating use case is an ISP subscriber connection where the CPE receives an ordinary attachment address, potentially from the CGNAT shared address space, while one or more separate public IPv4 prefixes are routed toward that subscriber.

The intention is to provide a generic way for the DHCP server to communicate, in effect, "this prefix is routed toward you", without requiring the routed prefix to be treated as an on-link subnet or used as the DHCP-assigned interface address.

I would particularly appreciate feedback on:

• Whether there is existing DHCP functionality or prior work that already addresses this use case.
• Whether the proposed option encoding is appropriate.
• The proposed client and server behaviour.
• Any operational, interoperability, or security issues I have overlooked.
• Whether this work is appropriate for discussion within DHC, or would be better handled elsewhere within the IETF.

This is my first Internet-Draft, so I am very much treating -00 as the start of the discussion rather than a finished proposal.

Thanks in advance for any review or comments.

Regards,

Brendon Drew