On Nov 27, 2009, at 13:53 , Carsten Bormann wrote: > On Nov 27, 2009, at 13:39, Carles Gomez Montenegro wrote: > >> interoperability > > The idea behind the split of the draft was that, at the host-router > interface, it does not matter whether/in what way DAD is performed, so > 6LoWPAN hosts will be interoperable with any way we do this.
Exactly. > > Now, within the "fabric" (set of 6LoWPAN routers and possibly edge routers), > the interoperability becomes more interesting. > In particular it would be useful to enable routers with minimal memory > requirements to work together with larger routers that provide additional > services. (That was also the idea between the router/ER dichotomy, but it > seems we need a more flexible assignment of functions.) It would be nice if > all the alternative ways of running the fabric I mentioned in my split > proposal wouldn't lead to different, non-interoperable protocols. I think > that can be done, but a design with many options is significantly more > complex than one that can be limited to a single model. Fortunately, this > complexity is limited to the routers/ERs; hosts don't have to care. There is actually another nice side-effect of this split. It turns out that for LoWPANs with just a single router (mesh-under), the host-router interface mechanism already provides DAD as the binding table has that information. For LoWPANs realizing an extended LoWPAN, this also achieves DAD as well. For simple route-over LoWPANs the split might also help us out by allow us to re-use the registration mechanism as one option. I don't have a big problem with achieving DAD within the fabric in a couple different ways, but would prefer a single way if possible. Zach > > Gruesse, Carsten > > _______________________________________________ > 6lowpan mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/6lowpan -- http://www.sensinode.com http://zachshelby.org - My blog "On the Internet of Things" http://6lowpan.net - New book - "6LoWPAN: The Wireless Embedded Internet" Mobile: +358 40 7796297 Zach Shelby Head of Research Sensinode Ltd. Kidekuja 2 88610 Vuokatti, FINLAND This e-mail and all attached material are confidential and may contain legally privileged information. If you are not the intended recipient, please contact the sender and delete the e-mail from your system without producing, distributing or retaining copies thereof. _______________________________________________ 6lowpan mailing list [email protected] https://www.ietf.org/mailman/listinfo/6lowpan
