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LDP Extensions for Hub and Spoke Multipoint Label Switched Path (RFC7140)

IP.com Disclosure Number: IPCOM000235458D
Original Publication Date: 2014-Mar-01
Included in the Prior Art Database: 2014-Mar-03
Document File: 30 page(s) / 34K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

L. Jin: AUTHOR [+4]

Abstract

The point-to-multipoint (P2MP) Label Switched Path (LSP) defined in [RFC6388] allows traffic to transmit from root to several leaf nodes, and multipoint-to-multipoint (MP2MP) LSP allows traffic from every node to transmit to every other node. This document introduces a hub and spoke multipoint (HSMP) LSP, which has one root node and one or more leaf nodes. An HSMP LSP allows traffic from root to leaf through downstream LSP and also leaf to root along the upstream LSP. That means traffic entering the HSMP LSP at the root node travels along the downstream LSP, exactly as if it were traveling along a P2MP LSP, and traffic entering the HSMP LSP at any other leaf nodes travels along the upstream LSP toward only the root node. The upstream LSP should be thought of as a unicast LSP to the root node, except that it follows the reverse direction of the downstream LSP, rather than the unicast path based on the routing protocol. The combination of upstream LSPs initiated from all leaf nodes forms a multipoint-to-point LSP.

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Internet Engineering Task Force (IETF)                            L. Jin Request for Comments: 7140 Category: Standards Track                                      F. Jounay ISSN: 2070-1721                                                Orange CH                                                             IJ. Wijnands                                                       Cisco Systems, Inc                                                               N. Leymann                                                      Deutsche Telekom AG                                                               March 2014

     LDP Extensions for Hub and Spoke Multipoint Label Switched Path

Abstract

   This document introduces a hub and spoke multipoint (HSMP) Label    Switched Path (LSP), which allows traffic from root to leaf through    point-to-multipoint (P2MP) LSPs and also leaf to root along the    reverse path.  That means traffic entering the HSMP LSP from the    application/customer at the root node travels downstream to each leaf    node, exactly as if it were traveling downstream along a P2MP LSP to    each leaf node.  Upstream traffic entering the HSMP LSP at any leaf    node travels upstream along the tree to the root, as if it were    unicast to the root.  Direct communication among the leaf nodes is    not allowed.

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/rfc7140.

 Jin, et al.                  Standards Track                    [Page 1]
 RFC 7140               LDP Extensions for HSMP LSP            March 2014

 Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    (http://trustee.ietf.org/license-info) in effect on the date of    publication of this document.  Please review these documents    carefully, as the...