Content Delivery Network Interconnection Capacity Capability Advertisement Extensions
RFC 9808, “Content Delivery Network Interconnection Capacity Capability Advertisement Extensions”, is a Proposed Standard document published in July 2025 by A. Ryan, B. Rosenblum, N. Sopher. The canonical text is published by the RFC Editor.
Abstract
This specification defines a set of additional Capability Objects that provide information about current downstream CDN (dCDN) utilization and specified usage limits to the delegating upstream CDN (uCDN) in order to inform traffic delegation decisions.
This document supplements the CDNI Capability Objects, defined in RFC 8008 as part of the Footprint & Capabilities Advertisement Interface (FCI), with two additional Capability Objects: FCI.CapacityLimits and FCI.Telemetry.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9808 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 9807 The OPAQUE Augmented Password-Authenticated Key Exchange Protocol
- RFC 9809 X.509 Certificate Extended Key Usage for Configuration, Updates, and Safety-Critical Communication
- RFC 9806 Updates to SIP-Based Media Recording to Correct Metadata Media Type
- RFC 9810 Internet X.509 Public Key Infrastructure -- Certificate Management Protocol
- RFC 9805 Deprecation of the IPv6 Router Alert Option for New Protocols
- RFC 9811 Internet X.509 Public Key Infrastructure -- HTTP Transfer for the Certificate Management Protocol
- RFC 9804 Simple Public Key Infrastructure S-Expressions
- RFC 9812 Clarification of IPv6 Address Allocation Policy