I am the assigned ART directorate reviewer for this document. These comments
were written primarily for the benefit of the ART area directors.  Document
editors and WG chairs should treat these comments just like any other last call
comments.

The document introduces two new CDNI Metadata Footprint Types in addition to those defined in RFC 8006.
The document is well written and easy to understand. I found no issues related to ART area.

Comment: it's a bit strange that document short title (which is repeated at the top of each page) 
is very generic: "Content Delivery Network Interconnection". I expected it to be more specific 
to the subject of the document, which only defines two additional types.