RSVP Extensions for Reoptimization of Loosely Routed Point-to-Multipoint Traffic Engineering Label Switched Paths (LSPs) (RFC8149)
Original Publication Date: 2017-Apr-01
Included in the Prior Art Database: 2017-Apr-20
Internet Society Requests For Comment (RFCs)
T. Saad: AUTHOR [+6]
node that identifies more than one node. This is often the case with inter-domain P2MP-TE LSPs where a Path Computation Element (PCE) is not used [RFC5440].
Internet Engineering Task Force (IETF) T. Saad, Ed. Request for Comments: 8149 R. Gandhi, Ed. Category: Standards Track Z. Ali ISSN: 2070-1721 Cisco Systems, Inc. R. Venator Defense Information Systems Agency Y. Kamite NTT Communications Corporation April 2017
RSVP Extensions for Reoptimization of Loosely Routed Point-to-Multipoint Traffic Engineering Label Switched Paths (LSPs)
The reoptimization of a Point-to-Multipoint (P2MP) Traffic Engineering (TE) Label Switched Path (LSP) may be triggered based on the need to reoptimize an individual source-to-leaf (S2L) sub-LSP or a set of S2L sub-LSPs, both using the Sub-Group-based reoptimization method, or the entire P2MP-TE LSP tree using the Make-Before-Break (MBB) method. This document discusses the application of the existing mechanisms for path reoptimization of loosely routed Point- to-Point (P2P) TE LSPs to the P2MP-TE LSPs, identifies issues in doing so, and defines procedures to address them. When reoptimizing a large number of S2L sub-LSPs in a tree using the Sub-Group-based reoptimization method, the S2L sub-LSP descriptor list may need to be semantically fragmented. This document defines the notion of a fragment identifier to help recipient nodes unambiguously reconstruct the fragmented S2L sub-LSP descriptor list.
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 7841.
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/rfc8149.
Saad, et al. Standards Track [Page 1]
RFC 8149 P2MP-TE Loosely Routed LSPs ...