Re: [RRG] Geographic aggregation-based routing is at odds with reality

[Ricardo Oliveira <rveloso@cs.ucla.edu>]

Depends on how you do it. i think geo aggregation has been  
consistently associated w/ bad design because of the bad examples  
proposed in the past, that negleted the fact that the first thing to  
route by is policy (local_pref is the first thing to check in bgp  
decision process).  after fixing this, it can look good both in paper  
and in the real world ;), e.g.
http://www.cs.ucla.edu/~rveloso/papers/giro.pdf

besides aggregation, geoinfo is usefull for fault detection, TE,...  
e.g. some isps tag routes with geographical info in entry points so  
customers(and isps themselves) can improve their route selection
cheers,

--Ricardo

> Geographical aggregation is the sort of thing which looks good on
> paper, but will never be acceptable in the real world.
>
>   - Robin
>
>
>
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