The IESG has approved the following document: - 'North-Bound Distribution of Link-State and TE Information using BGP' (draft-ietf-idr-ls-distribution-13.txt) as Proposed Standard This document is the product of the Inter-Domain Routing Working Group. The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah Brungard. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-idr-ls-distribution/ Technical Summary 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 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). Working Group Summary The idr WG has had discussions and extensive reviews for several years. There is strong consensus in publication. Document Quality The document has has extensive reviews in the idr WG for several years. There have been 7 implementations reported. Implementation report: https://tools.ietf.org/html/draft-ietf-idr-ls-distribution-impl Personnel Document Shepherd: Jie Ding (jie.dong@huawei.com) Responsible AD: Alvaro Retana (aretana@cisco.com) RFC Editor Note RFC Editor: a couple of late editorial changes. 1. Section 3.2.1.4: The last sentence ("The ASN...or IGP domain).") in the description of BGP-LS Identifier should be deleted. 2. Section 3.3.3: Change "with a link NLRI" to "with a prefix NLRI" in the first sentence. 3. Section 3.1: There's an extra "." right before the last sentence.
