Regional AS model
owen at delong.com
Thu Mar 24 14:40:23 CDT 2011
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.
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.
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