Date: Fri, 21 Feb 2025 17:45:09 +0000 From: Roy Marples <roy@marples.name> To: "Eugene Pereviazko" <john@dnepro.net> Cc: "freebsd-net" <freebsd-net@freebsd.org> Subject: Re: rtadvd(8) How to IPv6 tokenize interface identifier Message-ID: <195299cfe41.d7a8e8731186.6219551516433988607@marples.name> 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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Hi ---- On Fri, 21 Feb 2025 13:31:53 +0000 Eugene Pereviazko <john@dnepro.net> wrote --- > 21.02.25 08:52, A FreeBSD User пише: > > Hello, > > > > Linux (especially OpenWRT we use) knows about a concept named "IPv6 tokenized interface > > identifier". The concept is self explanatory, a interface/router obtains a propagated prefix > > and the concept allows the explicit definition of the host portion. > > > > 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) configuration file, but I > > haven't managed yet to accomplish such a task (to speak simple: I'd like to have a router of a > > subnet always at IPv6 Network PREFIX:0:0:0:1). > > Am I correct that you want your host to combine predefined host part > (instead of eui64) with dynamically received prefix? > > Like, set host part to ::DEAD:1 then receive 2001:db8:1234:4321::/64 > prefix from router and get your address of 2001:db8:1234:4321::DEAD:1? > > Then rtadvd is not a tool for that. rtadvd is for advertising, not > receiving advertisements. > > If I'm not mistaken You should try dhcpcd from ports or packages, > specifically "slaac token" verb, as I don't know of similar feature in > base system. > > > Linux has this feature since a while and I can not believe that FreeBSD lacks such a feature. > > > > Thank you very much in advance, As Eugene said, you can use dhcpcd in ports with the slaac directive like so interface bge0 slaac token ::dead:beef Then you get ::dead:beef appended to each autoconf address from the RA. You could use ::1 for your token which should meet your needs as above. Good luck! Roy
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