I-D Action:draft-azinger-scalable-addressing-00.txt

[Tony Li]

Michael,

> I'm trying to wrap my brain around how PA space is going to be "better" than PI space.  Follow my potentially flawed logic.
> 
> - I have a /32 that I announce through my various upstreams - no more specifics, just one /32.
> - I get a /48 from my upstream out of their /32.  I announce my /48 through my various providers
> - I pressure my provider into announcing my /48 as well for traffic engineering


Here's your problem.  No routing architecture can scale if everyone injects every arbitrary prefix into the DFZ.


> - Now we have a /32 and a /48 in the table.
> - Rinse, repeat
> 
> How is this better?  Is it really anyone's assumption that I should be forced into a one-upstream solution and that I would find that acceptable? 


No, but if you had PA with ILNP, you'd have N different prefixes, one from each of your upstreams.  Your hosts would seamlessly switch between each of these prefixes.  None of them would need to be globally visible and would be part of our upstreams aggregates.

Tony