Well it seems you've taken a little heat for my figures. Firstly, if you look at my mail I said much the same thing as you've been saying. There was a big *IF* on aggregation at AS level implying optimism however as I also said without a full knowledge of the routing topology (yes - we need a global routing registry - its coming) of the Internet I am not sure how else we can estimate things. In fact, as Andrew points out for a lot (non-load balenced ASes) this would be what we can get right now. Now to the violent agreement part....let's aggregate ! * * > > I'm not saying CIDR isn't going to be highly beneficial, it will be. * > > I'm just saying that Tony's figures are optimistic. * > * > This brings up one of the items I wanted to talk about in ALE next * > week: the figures that I've been generating for the growth charts * > to estimate how much CIDR helps are also based off Merit's nets.unl * > files, but look at only the first AS number to decide where the * > aggregation occurs.. Would that be considered overly pessimistic? * > -- Frank * * * Using the border AS number is just plain inaccurate. A better (but * still not perfect) means of making this estimate would be to take a * routing dump and compare the entire AS path. For example, if Tony (or * someone in Europe) has two routes for AS 86 and one goes through AS * 287 before hitting AS 690 and one goes straight to AS 690, he knows * that AS 690 could proxy aggregate in the future (since AS 287 will go * away shortly). If the ANS fake AS kludge (technical details on * request) where not there, you would just see AS 86, but proxy * aggregation would still be required to not break Suranet's load * balancing acroos there Washington and Atlanta attachments. There may * be other cases of two providers that touch in two places that you * can't see looking at a routing dump. * * ALE is entertaining, but I don't think you will be able to get very * accurate estimates of CIDR benefits. I'll get you a gated dump from * the ANS backbone, if you need to entertain yourself. :-) * Same here - running at 31 Megs worth ;-(. * Seriously - Let's take this discussion of how to make the estimates * more accurate off line or move it to the ALE list (there is one * right?). I will get you a gated dump if you want to do an analysis * based on it, or you can get a routing dump from someone in Europe (or * both). * Agreed. We can also provide one if you need it. * My view of CIDR is that we absolutely need to get moving on replacing * more specific routes with aggregates as soon as we can be assured it * won't break things. Then we can see how much we are able to initially * reduce routing table size and project from there. * Right. Right. Right.. * Curtis * --Tony