Re: ndp(1) and arp(1) enhancements for easier scripting of IPv6 prefix delegation

[Tobias Nygren <tnn%NetBSD.org@localhost>]

On Sun, 21 Jun 2026 12:08:46 +0200
Martin Husemann <martin%duskware.de@localhost> wrote:

> What do others do? Not care about IPv6, have a fixed prefix, something else?

I have a convoluted orchestration that starts with a dhcpcd hook script.
dhcpcd sets a bunch of environment variables with information about the
delegation. This in turn runs a bunch of other scripts that regenerate
npf.conf and dhcpd6.conf from m4 templates with the prefixes
subsituted. Using DHCPv6 gives opportunity to assign shorter addresses
instead of using mac addr.

The delegated prefixes have not changed in over a year so I never got
around to implementing a solution for DNS but resort to manually
updating the zone when needed.

-Tobias