http://www.rfc-editor.org/rfc/rfc6981.txt
RFC 6981: A Framework for IP and MPLS Fast Reroute Using Not-Via Addresses, S. Bryant, S. Previdi, M. Shand2013-08-01T23:00:00-00:00The mechanisms presented in this document are purely illustrative of the general approach and do not constitute a protocol specification. The document represents a snapshot of the work of the Routing Area Working Group at the time of publication and is published as a document of record. Further work is needed before implementation or deployment.