A new Request for Comments is now available in online RFC libraries. RFC 7855 Title: Source Packet Routing in Networking (SPRING) Problem Statement and Requirements Author: S. Previdi, Ed., C. Filsfils, Ed., B. Decraene, S. Litkowski, M. Horneffer, R. Shakir Status: Informational Stream: IETF Date: May 2016 Mailbox: sprevidi@cisco.com, cfilsfil@cisco.com, bruno.decraene@orange.com, stephane.litkowski@orange.com, Martin.Horneffer@telekom.de, rjs@rob.sh Pages: 19 Characters: 38006 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-spring-problem-statement-08.txt URL: https://www.rfc-editor.org/info/rfc7855 DOI: http://dx.doi.org/10.17487/RFC7855 The ability for a node to specify a forwarding path, other than the normal shortest path, that a particular packet will traverse, benefits a number of network functions. Source-based routing mechanisms have previously been specified for network protocols but have not seen widespread adoption. In this context, the term "source" means "the point at which the explicit route is imposed"; therefore, it is not limited to the originator of the packet (i.e., the node imposing the explicit route may be the ingress node of an operator's network). This document outlines various use cases, with their requirements, that need to be taken into account by the Source Packet Routing in Networking (SPRING) architecture for unicast traffic. Multicast use cases and requirements are out of scope for this document. This document is a product of the Source Packet Routing in Networking Working Group of the IETF. INFORMATIONAL: This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. This announcement is sent to the IETF-Announce and rfc-dist lists. To subscribe or unsubscribe, see https://www.ietf.org/mailman/listinfo/ietf-announce https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist For searching the RFC series, see https://www.rfc-editor.org/search For downloading RFCs, see https://www.rfc-editor.org/retrieve/bulk Requests for special distribution should be addressed to either the author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless specifically noted otherwise on the RFC itself, all RFCs are for unlimited distribution. The RFC Editor Team Association Management Solutions, LLC