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Regional AS model

Subject: Regional AS model
From: zaid at zaidali.com (Zaid Ali)
Date: Thu, 24 Mar 2011 11:42:28 -0700

I have seen age old discussions on single AS vs multiple AS for backbone and datacenter design. I am particularly interested in operational challenges for running AS per region e.g. one AS for US, one EU etc or I have heard folks do one AS per DC. I particularly don't see any advantage in doing one AS per region or datacenter since most of the reasons I hear is to reduce the iBGP mesh. I generally prefer one AS  and making use of confederation. 

Zaid

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