Re: [rrg] Geoff Huston's BGP/DFZ research - 300k DFZ prefixes are the tip of the iceberg

[Tony Li]

>> Indeed, you're trading systemic state for implementation optimizations,
>> in lots of places where issues such as this are amplified.  > 40%
>> duplicates in a system today ma not be a problem, however, if prefix,
>> origin, and path validation techniques are employed down the road in a
>> secure routing protocol built on the current model, and every one of
>> those updates have to be processed, I suspect at some point senders will
>> be a bit more conservative in what they send.
> 
> No necessarily - the receivers can cache validation outcomes with reasoinbly
> efficient results. See http://www.potaroo.net/papers/phd/pam-2007/bgpcache.pdf
> for a study of this approach.


One can also point out that an update that is a duplicate of what's already
been accepted is irrelevant.  Regardless of whether it has been validated or
not.  

;-)

Tony

P.s. Ok, small exception in the case where you're in the middle of
transitioning from a non-validated world and you have accepted a
non-validated path and just received a validated path.  


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