Regional AS model

[owen at delong.com (Owen DeLong)]

Sent from my iPad

On Mar 24, 2011, at 12:42 PM, Zaid Ali <zaid at zaidali.com> wrote:

> 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

If you have good backbone between the locations, then, it's mostly a matter of personal preference. If you have discreet autonomous sites that are not connected by internal circuits (not VPNs), then, AS per site is greatly preferable.

Owen