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North-Bound Distribution of Link-State and TE Information using BGP

Document Type Replaced Internet-Draft (individual)
Authors Hannes Gredler , Jan Medved , Stefano Previdi , Adrian Farrel
Last updated 2012-10-10 (Latest revision 2012-07-15)
Replaced by RFC 7752
Stream (None)
Intended RFC status (None)
Expired & archived
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-idr-ls-distribution
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


In a number of environments, a component external to a network is called upon to perform computations based on the network topology and current state of the connections within the network, including traffic engineering information. This is information typically distributed by IGP routing protocols within the network This document describes a mechanism by which links state and traffic engineering information can be collected from networks and shared with external components using the BGP routing protocol. This is achieved using a new BGP Network Layer Reachability Information (NLRI) encoding format. The mechanism is applicable to physical and virtual links. The mechanism described is subject to policy control. Applications of this technique include Application Layer Traffic Optimization (ALTO) servers, and Path Computation Elements (PCEs).


Hannes Gredler
Jan Medved
Stefano Previdi
Adrian Farrel

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)