Hi all, I'm also following the conversation and add one to Radek's request: is this info (or part of it) public Jeroen? I would be highly interested. Regards, -- Joan A. García-Espín CTX, i2CAT Foundation El 10/02/2010, a las 9:55, Radek Krzywania escribió:

Hi Jeroen, Is there any way to see the results of your simulations and the chapter you wrote on aggregation? I would like to take a closer look on that issue, as this issue is something I was investigating some time ago and could not find a strong reason to claim one to be better than the other.

Best regards Radek

________________________________________________________________________ Radoslaw Krzywania Network Research and Development Poznan Supercomputing and radek.krzywania@man.poznan.pl Networking Center +48 61 858 20 28 http://www.man.poznan.pl ________________________________________________________________________

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-----Original Message----- From: nsi-wg-bounces@ogf.org [mailto:nsi-wg-bounces@ogf.org] On Behalf Of Jeroen van der Ham Sent: Tuesday, February 09, 2010 6:23 PM To: John MacAuley Cc: nsi-wg@ogf.org Subject: Re: [Nsi-wg] Fwd: Thoughts on a basic topology model for NSI

On 09/02/2010 07:37, John MacAuley wrote:

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1. Aggregation and summarization.

I've done some simulations, analysis and have written a chapter about this in my thesis. My results show that aggregating a domain to a single node performs very badly compared to an aggregation model where you advertise a full mesh between edge nodes. I would also argue that the advantages of simplifying the internal domain do not balance the disadvantages you have in false positives in inter-domain pathfinding.

However, these simulations have only used a single layer. We're currently looking at pathfinding in multi-layer networks, and we're thinking about how to create aggregations for multiple layers. This is a hard problem.

Given the fact that current domains are not that complicated, and we have a very open culture in regards to information exchange, I would suggest that we leave the problem of aggregation open for now and just use full topologies.

Jeroen. _______________________________________________ nsi-wg mailing list nsi-wg@ogf.org http://www.ogf.org/mailman/listinfo/nsi-wg

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