Re: disconnected autonomous systems

[alex () yuriev com]

> > inherently wrong with using a single AS in multiple locations, and
> > advertising discrete blocks of address space in each one. The best reason
> > to do this is for a network that you eventually plan to merge - it
> > eliminates issues of having to make major BGP configuration changes.
>
> Nothing inherently wrong with it if you're paying for transit, but good 
> luck getting peering in multiple locations without presenting consistent 
> views.

No problem at all. Use a tunnel.

Going back to the original question:

(A) Is there a reason have disconnected ASs? Sure. Does it make more sense
than using multiple AS numbers? No.

(B) Is there a reason to deaggregate? Absolutely. The biggest being rather
bad internal allocations practiced by networks.

Alex

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