An open discussion list for topics related to the eduGAIN interfederation service.

[Ian Young <ian AT iay.org.uk>]

On 7 Jul 2014, at 11:06, Nicole Harris <harris AT terena.org> wrote:

> Supporting SPs "quitting" federations when they can get everything from
> one place is going to be an interesting task.

I agree. The critical point comes when all of the client IdPs the SP is 
interested in from a given eduGAIN participant federation become available 
through eduGAIN. That's when that SP can simplify their lives by *not* having 
to register with that federation. Ultimately, of course, you'd hope that each 
SP would only need to register once (for purposes of metadata exchange, let's 
skip over the contractual issues for now).

For the larger SPs, this may be a hard place to get to as it will require 
that essentially all of the IdPs registered in the target federation become 
available to them through eduGAIN. Even a few which are not will be enough 
for the SP to feel that they need to register everywhere. As a result, it's 
hard for me to imagine an opt-in policy for IdPs ever leading to the state we 
want.

        -- Ian

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