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Re: filtering long prefixes
From: bmanning () ISI EDU
Date: Sun, 24 Sep 1995 11:43:32 -0700 (PDT)

Are you suggesting some sort of exchange point or NAP specifically to 
break out longer prefixes from shorter prefixes that cannot be 
topologically aggregated? Would something like this enable people
to maintain provider independent addressing (i.e. no renumbering) by 
merely paying a fee to an exchange point that is well connected and 
settling for less optimal routing?

If this will work in practice, it seems like the perfect tradeoff. On the 
one hand you must renumber when changing providers but you get optimal 
routing. On the other hand, you avoid renumbering but you pay a few bucks 
and have less than optimal routing.

Am I missing anything here?

        Perhaps a couple of things:
                - Common transit agreements for all particpants
                - Single point of attachment, ie you must renumber
                  if you home to another provider or exchange.


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