Re: Regional AS model

["Patrick W. Gilmore" <patrick () ianai net>]

On Mar 24, 2011, at 3:40 PM, Owen DeLong wrote:
> On Mar 24, 2011, at 12:42 PM, Zaid Ali <zaid () 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.

We disagree.

Single AS worldwide is fine with or without a backbone.

Which is "preferable" is up to you, your situation, and your personal tastes.  (I guess one could argue that wasting AS 
numbers, or polluting the table with lots of AS numbers is bad or un-ashetically pleasing, but I think you should do 
whatever fits your situation anyway.)

-- 
TTFN,
patrick