All, I have a couple of questions in reference to a recent post on the nanog list about possbily using "De-aggregating Routes". NOw it's understood that there are on some inherent flaws(thrashing and blackholing) associated with overpopulating the internet route tables through de-aggregation, When we consider the reasoning behind the creation and implemntation of CIDR. I recently revisted Avi Freedman's realaudio stream on "Controlled De-Aggregation" using MEDs and larger aggregates(nanog9905). This got me to thinking! Based on what we already know of CIDR and the knwon disadvantages of De-aggregation, there are some possible advantages in Avi's suggestion of controlled de-aggregation. Pointing back to W B. Norton's "Internet Service Providers and Peering" and "The Art of Peering" he makes some suggestions that cold-potato routing could be used to circumvent sub-optimal routing. There are a number of ways that cold-poato routing could be achieved, but as it relates to this discussion, wouldn't controlled de-aggregated routes and the use of MEDs provide another mechnisim to achieving this objective? Is this a case of the "ends dosen't justify the mean"?. Nigel
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