Date: Fri, 21 Feb 2025 07:52:33 +0100 From: A FreeBSD User <freebsd@walstatt-de.de> To: FreeBSD CURRENT <freebsd-current@freebsd.org>, freebsd-net@freebsd.org Subject: rtadvd(8) How to IPv6 tokenize interface identifier Message-ID: <20250221075300.4466057d@thor.sb211.local>
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[-- Attachment #1 --] 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). The only config tag I can imagine is responsible for what I'd like to achive is the "addr" tag mentioned in rtadvd.conf(5), but whatever I fill this tag with - the desired effect is never achived (i.e addr="::0.0.0.1"). My "FreeBSD homebrewn" router has several networks, attached to vlan. Each interface is subject of an ULA prefix and an IPv6 prefix provided by our ISP. It is possible to pin the ULA toward the desired address, like addr="fd50:c450::1", but then the ISP provided prefix seems not to be set properly or is completely absent. Omitting "addr=" provides the interface with ULA prefix and ISP prefix - but obviously with the randomly generated 64bit host portion. Playing around with mutually suitable tags, like "pinfoflags", "raflags" or "rtflags" and having probed almost every possible combination (with or without some sense), it seems impossible to provide a) both ULA and ISP prefix pin the host portion to a desired 64bit address, like "PREFIX::1". I do not exclude that I'm possibly incapable of comprehension the manpage (the language is and the deeper semantics seem then to be hidden for me). So, if there is a clear expalanation how to achive the desired, please point me towards it (thanks in advance!). 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 -- A FreeBSD user [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQRQheDybVktG5eW/1Kxzvs8OqokrwUCZ7gizAAKCRCxzvs8Oqok r0m7AP0ZSdHzoVRagBPVuDWWxcGp7pr4qrWK4y/6urBN0V3V3wEAoJafULkNvzXP GfVCWOFbZze/RJuF76wGmqlZc/V0/gs= =dfnX -----END PGP SIGNATURE-----help
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