[ppml] 2005-1 or its logical successor

Stephen Sprunk stephen at sprunk.org
Wed Nov 9 11:11:50 EST 2005

Thus spake cja at daydream.com
> As much as I think that geographical addressing could be a good idea,
> networks aren't routed geographically.  The interconnections aren't there
> to make aggregation per your RFC feasible.  I believe that currently there
> is as much geography taken into account as can be.  The RIRs get
> blocks for their regions.  Some aggregation could be done at that level
> depending on how things are connected together.  I do not believe that
> assigning PI space per your rfc will gain us anything that assigning PI
> blocks per region out of a known PI block won't do.  You refer in your
> note to aggregating the further from the source.  Unfortunately "distance"
> is assessed on how far topologically in a provider network the traffic
> travels, not necessariliy on how far it goes geographically.

True, but in the various discussions I've seen of this idea, the natural 
conclusion seems to be that each geographical area would have an IX that all 
ISPs using the PI block would be required to connect to, and each ISP would 
advertise only the aggregate to their transit providers.  It appears 
settlements would be required for traffic coming in on one ISP's links and 
headed to another ISP's customers; upstream traffic would be handled as it 
is today.

This model effectively trades a BGP routing problem for a money routing 
problem.  Given no significant improvements have been made to BGP for a long 
time, perhaps it's time to let the bean-counters have their shot?

I'm also wondering how many "tier 1" providers would be willing to 
participate in such a model absent government regulations.  Why would UUNET 
want to do something that makes it easier for their customers to multihome 
(or rehome) to "tier 2/3" providers or even another "tier 1"?  Would we see 
significant benefits with just the smaller ISPs participating?


Stephen Sprunk        "Stupid people surround themselves with smart
CCIE #3723           people.  Smart people surround themselves with
K5SSS         smart people who disagree with them."  --Aaron Sorkin 

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