When I look at the Internet as a whole, I recognize that while there are standards, those standards are meant to help people create hardware/software that will interoperate with others. Standards that are meant to avoid distribution of necessary information due to it being classified proprietary are not as valuable as those that work to define a process.
Currently the CDNI group is working partly to satisfy the providers who are concerned that giving out too much information will allow other providers to use that information in an underhanded way. I do not agree with this direction.
In order for a federation to work, all of the providers in the federation must have something to offer. This means these providers are valuable to the ecosystem. If a provider is advertising x while only having y (capacity/features/etc) then the provider is not a trustworthy addition to the federation.
That being said, my experience from negotiating peering, dealing with DoS and DDoS attacks and other networking issues since the early 90′s has taught me that there will always be a back channel for communication between entities that rely on each other. This will have to be true in CDN Federation.
I am going to recount my view of being in the middle of one of the more famed DDoS attacks. TL;DR – MafiaBoy took down one of my customers and working with my peers at other ISPs was why the damage was limited.
In February of 2000 there was (the first) high-profile DDoS attack on multiple Internet properties including Amazon, eBay, Buy.Com, Onsale and others. During this time I was working for Exodus Communications as a Sr. Network Engineer.
The whole time the engineering and security teams from the different ISPs hosting the providers under attack (myself included) were freely sharing any information possible to help and be helped dealing with the situation. This information included things like router versions, hardware, packet captures, filters used/tried, etc.
I believe this is one of the main reasons the attacks were only effective for short periods of time. This was not the first or last time that these types of discussions happened.