Hi James, Hitesh could ask some changes about announcing Beacon Prefix. Vasco might need help to do those changes. Could you please give him a hand to do those changes? BTW, I updated the following page. http://www.ripe.net/ripencc/pub-services/np/ris/beaconlist.html You can find the latest changes there. Thanks. Arife ----- Begin forwarded message ----- Date: Fri, 17 Sep 2004 02:11:17 -0400 From: "Hitesh Ballani" <hitesh@cs.cornell.edu> To: "RIPE NCC RIS" <ris-request@ripe.net> Subject: RE: NCC#2004081420 RIPE beacon request! Message-Id: <81224EA6DDA07C43BC7555E32401029E054260@EXCHVS2.cs.cornell.edu> Hi Arife,

Sorry getting back to you late. That is all-right ... I can imagine you being very busy!

Please let me know which RRCs you like to announce Beacon prefix and which pattern we will start-up.

Lets start off with a prefix (I presume 195.80.238.0/24) being advertised as normal (i.e. no periodic withdrawals) from 6 locations : RRC01 (Lon,UK), RRC02 (Paris,UK), RRC05 (Vienna,AT), RRC06 (Otemcahi, JP), RRC08 (San Jose,US), RRC11(NY,USA). As I mentioned earlier, the purpose is to get baseline measurements for an anycasted prefix when there are no flaps (at least, no intentional flaps). Then, later we can introduce flaps for other experiments. Actually, what I would like to do is to have the prefix advertised in a stable fashion (i.e. no intentional withdrawals) from 7 RRC locations with the locations changing every couple of days .... i.e. of the 13 RRCs, 7 are always advertising the prefix but the set of seven changes every couple of days ...since, I would like the non-european sites (3 of them) to always be part of the advertising set, so we are left with choose(13 - 3, 7 -3) = choose(10,4) = 1260 combinations ... while this is not certainly not possible, I was wondering if we could try out 5-7 odd combinations so that the entire experiment finishes in a couple of weeks and then, we can move onto the experiments with periodic withdrawals ... however, I am not sure if this can be automated (I would be happy to write any scripts needed for this) because it would be a pain for you to do this manually .. if this is possible, then I would be more than happy to send you a chart of the 5-7 sets of 7 RRCs, each set advertising the prefix for 2 (or whatever u are comfortable with) days .. However, if this is not feasible, then we could start with the pattern mentioned in the previous paragraph and make 1 or 2 changes (2 weeks, one change a week gives us 2 combinations to try out). Comments?? By the way, are you going to set up interfaces on these machines so that I can also do end-to-end experiments? Thanks, Hitesh ------ End forwarded message ------