Re: dhcp6leased, rdomains, and reject route

On Thu, Jun 04, 2026 at 03:56:36PM +0100, Florian Obser wrote:
> On 2026-06-03 23:35 UTC, "Landy, Brian" <[email protected]> wrote:
> > Should dhcp6leased automatically install routes for delegated prefixes
> > in the source interface’s rdomain when the assigned interfaces are in
> > different rdomains? If not, what is a good way to monitor dhcp6leased
> > for changes so I can automate adding those routes when needed? Or I
> > could use dhcpcd since it has hooks, but I’d like to use dhcp6leased
> > if possible.
> 
> dhcp6leased(8) should to the right thing[tm] automagically.
> Hooks are to be avoided at all costs, to wit: CVE-2026-42512,
> CVE-2026-42511
> 
> I need to re-read your email when I'm less tired to figure out what the
> right thing is.
> 
> I'd also be interested in the opinion of other people familiar with
> rdomains.

This is a complex question. In general I would expect that dhcp6leased
does not cross rdomain boundaries. I would expect that for
	request prefix delegation on em0 for em1
to work that both em0 and em1 run in the same rdomain.
Delegating a prefix from one rdomain to a different one is certainly not
common and requires extra config to work since you can't trivally jump
rdomains so why would you delegate a prefix.

-- 
:wq Claudio