The IESG has approved the following document: - 'Advertisement of Multiple Paths in BGP' (draft-ietf-idr-add-paths-15.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-add-paths/ Technical Summary This document extends BGP so a BGP speaker can advertise multiple paths rather than a single best path to peers. It proposes a new NLRI encoding extension to carry a Path Identifier, and a new capability to negotiate the carrying of additional paths. These additional paths are intended to used to eliminate path oscillation, in a number of situations where advertising multiple paths can improve network convergence, and in a number of situations where BGP is used in "high fan out" equal cost multipath network topologies to provide optimal path availability. Working Group Summary The working group has reached consensus on moving this document forward at this point. Document Quality The extension to BGP is straightforward; while there has been some difficulty in coming to consensus on the benefits provided versus the difficulty in implementing the extensions, the value of the concept has been proven in deployment scenarios and use cases enough to justify moving forward with this document. The document has passed through ten revisions over a number of years, and has been discussed both on and off the relevant lists by a number of experts in the development and deployment of BGP. Personnel AD: Alia Atlas Shepherd: Russ White
