School me on hub and spoke federations

[Basney, Jim]

On 5/13/13 3:58 PM, "Leif Johansson" <leifj at sunet.se> wrote:
>The down side is that they tend to suck for inter-federation.

Could you please expand on that? I was thinking hub-and-spoke would be
great for inter-federation because you'd only need to inter-federate the
hub rather than a large number of individual federation entities. What am
I missing?

Thanks,
Jim