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Date:      Sun, 23 Feb 2025 18:05:40 +0100
From:      A FreeBSD User <freebsd@walstatt-de.de>
To:        Eugene Pereviazko <john@dnepro.net>
Cc:        freebsd-net@freebsd.org
Subject:   Re: rtadvd(8) How to IPv6 tokenize interface identifier
Message-ID:  <20250223180607.3dad6d16@thor.sb211.local>
In-Reply-To: <a246f982-f0d9-9447-75d2-7c86bacea558@dnepro.net>
References:  <20250221075300.4466057d@thor.sb211.local> <a246f982-f0d9-9447-75d2-7c86bacea558@dnepro.net>

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Am Fri, 21 Feb 2025 15:31:53 +0200
Eugene Pereviazko <john@dnepro.net> schrieb:

> 21.02.25 08:52, A FreeBSD User =D0=BF=D0=B8=D1=88=D0=B5:
> > Hello,
> >
> > Linux (especially OpenWRT we use) knows about a concept named "IPv6 tok=
enized interface
> > identifier". The concept is self explanatory, a interface/router obtain=
s a propagated
> > prefix and the concept allows the explicit definition of the host porti=
on.
> >
> > I haven't managed to accomplish such a behaviour using FreeBSD's rtadvd=
(8) daemon. I guess
> > this task is subject of and performed through the rtadvd.conf(5) config=
uration file, but I
> > haven't managed yet to accomplish such a task (to speak simple: I'd lik=
e to have a router
> > of a subnet always at IPv6 Network PREFIX:0:0:0:1). =20
>=20
> Am I correct that you want your host to combine predefined host part=20
> (instead of eui64) with dynamically received prefix?
>=20
> Like, set host part to ::DEAD:1 then receive 2001:db8:1234:4321::/64=20
> prefix from router and get your address of 2001:db8:1234:4321::DEAD:1?

Correct.

>=20
> Then rtadvd is not a tool for that. rtadvd is for advertising, not=20
> receiving advertisements.

Yes, also correct, realised that AFTER sending my posting.

>=20
> If I'm not mistaken You should try dhcpcd from ports or packages,=20
> specifically "slaac token" verb, as I don't know of similar feature in=20
> base system.

I'm using what others recommend and also use: KAME 2008 dhcp6c. Now clue ho=
w to achive the
desired with this ancient tool ...

>=20
> > Linux has this feature since a while and I can not believe that FreeBSD=
 lacks such a
> > feature.
> >
> > Thank you very much in advance,
> >
> > O. Hartmann
> >
> > =20



--=20

A FreeBSD user

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