Hello, We finally had no time to briefly present a measurement campaign we made on the mapping system.
The slides are on http://www.ietf.org/proceedings/84/slides/slides-84-lisp-8.pdf and I invite you to comment. As you certainly know, the mapping system has been migrated to LISP-DDT with success on 3/14/2012. As the migration was planed, we have decided to measure it! To do so, we used vantage points around the world in different network types (EID space, commercial Internet, research Internet...). These vantage points have measured for a period of about one month the mapping system. To do so, they have send a Map-Request for all the EID prefixes with lig, and this every 15 minutes. We expected to observe a big difference of delay and mappings between ALT and DDT. However, the result we obtain is that the change is not very significant. There is no particular loss of map-Request/Map-Reply during the transition and the delay is not significantly increased or reduced. However, we observe a much more variable delay now with DDT than before where delays were very stable with time. After these measurements, we looked at the long term trends in the mapping system thanks to lispmon. The general trend is that the number of mapping increases (and more particularly the negative mappings) and that very few mappings use several RLOCs. Looking at this. This work is very brief and only show basic results, however, it raises two interesting questions. First, how can we make the DDT retrieval delay more stable (maybe it is just a question of organisation and trafic). Second, can we imagine to simplify the mappings such a way that all the complexity of mappings with the priority, weight, R-bit... is there only when necessary? I am looking forward for your comments, Damien Saucez _______________________________________________ lisp mailing list [email protected] https://www.ietf.org/mailman/listinfo/lisp
