Policy Statement on Address Space Allocations
Alex.Bligh amb at Xara.NET
Thu Jan 25 18:15:21 CET 1996
Please excuse me for butting in on a argument the political background of which I know very little, but this was directed at local-ir so: <snip> > If you have some technical means by which you can > guarantee that no future allocations will result in > rafts of unaggregated addresses like the random chunk > cut and pasted above, then I would like to know about it. <snip> > I don't disagree that historically RIPE's allocation > policy has been *excellent*. However, there are two > problems: firstly, it is insufficient in and of itself > to prevent things like the stuff above, and secondly > there is a disconnect between allocations and announcements. > > So, let's kill two birds at once: first, an enforcement > mechanism to push people into announcing only one prefix > per allocation, and second, increase the size of the > initial allocation, which will tend to push people away > from RIPE as the registry of first choice. Problem 1: Smaller local-ir's with their own AS's cannot get windows larger than /19 from RIPE. If they need more than a /19 and request them non-simultaneously the /19s are not likely to be adjacent and hence aggregatable. If Sprint or anyone else refuse to accept /19 announcements, there is no way such local-IR's can get their IP numbers routed. For instance our announcement contains a /19 which is adjacent only to allocations nothing to do with us. Problem 2: Historically the breaking up of RIPE windows/allocations between different AS's has lead to a multitude of tiny announcements. Problem 3: Some ISPs have been lazy in the aggregation of routes on their router. How about: Each window that RIPE dish out (currently never smaller than /19) must have an AS number associated with it in the RIPE database before any allocations from that window are 'legal'. All announcements of address within that window must be made a single aggregated announcement covering the entire window (or more if there happens to be an adjacent allocation) which originate in the associated address. This fixes the PA addresses issue (with the slight complication that providers could theoretically need one window per AS, but this would help aggregation anyway). New PI addresses I couldn't really care less if Sprint etc. don't carry them, but essentially as long as they fall in an entire /19 with associated AS object they culd fall under the same scheme. The only legitimate reason for new PI addresses as far as I am concerned is to issue to small-ish organizations who are not local-ir's and are not multihomed, and will want /19 or thereabouts. Solves problem 1 IMHO. A time limit could be proposed where the above could be enforced for the rest of 193.* & 194.*, with RIPE cooperating to help existing providers renumber. Solves problem 3. Which just leaves (2) (historical - like most of 192.*). Well at least this problem won't grow. Alex Bligh Xara Networks
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