> If I filter "no /24s in ARIN only-/20s-here blocks", I hit only those
> people that think they can announce whatever they like
No, you don't - which is all I was trying to tell you. I am not disagreeing that there is a considerable amount of fluff out there - but filtering per the ruleset above WILL lose you connectivity with some legitimately advertised routes.
> > Where do you get off telling them they must announce it as a /20?
>
> I'm not doing that. I tell them "if you want to reach AS 5539 in future,
> you'd better get your announcements aggregated".
And the difference between this and telling them they must announce it as a /20 is?
> So if you are one of the people that think there is a hard need to not
> announce your aggregate and only announce all the more specifics - could
> you elaborate on why this is so?
I hesitate to compound an already somewhat OT thread but since you asked, I am multihomed under extreme circumstances which make it impossible for me to have only one common provider/route. I have 4 outbound link, and five inbound links in three separate countries. Geographically and topologically it is *impossible* for me to aggregate (believe me, I wish I could), although I must say at least I can hold my head up and say I'm not so stupid as to simply advertise the whole /19 as /24's - I have aggregated as much as I can, and have 2 /24's the rest being a /21 and a couple of /22's and /23's.
On the whole I think we do not disagree too much despite this thread - I simply think you are going in the wrong direction trying to force aggregated announcements on "all", when what you should be (and appear to be) doing, is educating those for whom it *is* possible to aggregate.
Regards
Bob
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