Content Delivery Network Interconnection (CDNI) Request Routing: CDNI Footprint and Capabilities Advertisement using ALTO
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The Content Delivery Networks Interconnection (CDNI) framework
[RFC6707] defines a set of protocols to interconnect CDNs, to achieve
multiple goals such as extending the reach of a given CDN to areas
that are not covered by that particular CDN. One component that is
needed to achieve the goal of CDNI described in [RFC7336] is the CDNI
Request Routing Footprint & Capabilities Advertisement interface
(FCI). [RFC8008] defines precisely the semantics of FCI and provides
guidelines on the FCI protocol, but the exact protocol is explicitly
outside the scope of that document. In this document, we follow the
guidelines to define an FCI protocol using the Application-Layer
Traffic Optimization (ALTO) protocol.