North-Bound Distribution of Link-State and Traffic Engineering (TE) Information Using BGP (RFC7752)
Original Publication Date: 2016-Mar-01
Included in the Prior Art Database: 2016-Mar-17
Internet Society Requests For Comment (RFCs)
H. Gredler: AUTHOR [+6]
The contents of a Link-State Database (LSDB) or of an IGP's Traffic Engineering Database (TED) describe only the links and nodes within an IGP area. Some applications, such as end-to-end Traffic Engineering (TE), would benefit from visibility outside one area or Autonomous System (AS) in order to make better decisions.
Internet Engineering Task Force (IETF) H. Gredler, Ed. Request for Comments: 7752 Individual Contributor Category: Standards Track J. Medved ISSN: 2070-1721 S. Previdi Cisco Systems, Inc. A. Farrel Juniper Networks, Inc. S. Ray March 2016
North-Bound Distribution of Link-State and Traffic Engineering (TE) Information Using BGP
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 (TE) information. This is information typically distributed by IGP routing protocols within the network.
This document describes a mechanism by which link-state and TE 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 IGP 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).
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7752.
Gredler, et al. Standards Track [Page 1]
RFC 7752 Link-State Info Distribution Using BGP March 2016