Date: Thu, 24 Aug 2006 10:12:27 -0500 From: Brooks Davis <brooks@one-eyed-alien.net> To: Fredrik Lindberg <fli+freebsd-net@shapeshifter.se> Cc: freebsd-net@freebsd.org, Pat Lashley <patl+freebsd@volant.org>, Doug Barton <dougb@freebsd.org> Subject: Re: Zeroconfig and Multicast DNS Message-ID: <20060824151227.GC35200@lor.one-eyed-alien.net> In-Reply-To: <44EDBDD0.4050000@shapeshifter.se> References: <C408C9E0406302DF5EE12E67@garrett.local> <20060823212110.GD27961@lor.one-eyed-alien.net> <D6D2605619AD2B0F140F5802@garrett.local> <20060823221835.GA28978@lor.one-eyed-alien.net> <23D2619F6BACE4E728178EE5@garrett.local> <44ED3BD1.3030206@shapeshifter.se> <AC5769F16F9730CABCCC4E61@garrett.local> <44EDA9A5.2050108@shapeshifter.se> <BE1059C6974AD43BC382E107@garrett.local> <44EDBDD0.4050000@shapeshifter.se>
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--Sr1nOIr3CvdE5hEN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 24, 2006 at 04:55:12PM +0200, Fredrik Lindberg wrote: > Pat Lashley wrote: > >>I treat LLA and mDNS as separate things. They can be used individually > >>or together. I see LLA as a way of configuring an IP-address while > >>mDNS is a way of resolving DNS-like hostnames. > > > >Don't forget service discovery. That's an important part of zeroconf,=20 > >implemented via mDNS. >=20 > I'm not. But LLA can run without mDNS and mDNS can run without LLA, but > SD requires mDNS. >=20 > > > >>Howevery, your statement above brings up a question, do you assume > >>that a system configured with lla should be able to communicate > >>with a system configured via dhcp? > > > >Yes, of course. The question is basically the same as whether hosts on= =20 > >the same link but different IP (sub)net ranges should be able to=20 > >communicate with each other. The answer is that either both hosts must= =20 > >implement ARP/RARP functionality, or that there be at least one=20 > >additional host with addresses in both ranges that is willing to act as= =20 > >a router. >=20 > Of course it's possible with a router, but what I was after, was the > situation when a host is configured with LLA but without a default route > , should such host be able to communicate with other hosts on the > same link that has addresses configured in other ranges (obtained by > other utilities, dhcp, static etc). Yes, but in general if and only if it has an address in those ranges. While it tends to be confusing and can lead to brokenness, there's nothing wrong with configuring addresses for multiple subnets on the same interface. The one exception is a configuration where you have an interface route and make ARP requests for all addresses rather than explicitly specifing a specific default router, but that's probably not the right default configuration (useful though it could be). To really make that work well I thing we need the ability to handle multiple default routes and assign them priorities. -- Brooks --Sr1nOIr3CvdE5hEN Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFE7cHaXY6L6fI4GtQRAsfQAJ9fgJn0PAP1969hGhjp0rlBphF3LgCgzvjL YsGFTxllkoG4PqSzVXaUe70= =TW9C -----END PGP SIGNATURE----- --Sr1nOIr3CvdE5hEN--
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