Multipoint LDP (mLDP) Node Protection
RFC 7715
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RFC - Proposed Standard
(January 2016; No errata)
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Last updated |
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2016-01-08
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Replaces |
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draft-wijnands-mpls-mldp-node-protection
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Loa Andersson
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Shepherd write-up |
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Show
(last changed 2015-02-24)
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| IESG |
IESG state |
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RFC 7715 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Deborah Brungard
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) IJ. Wijnands, Ed.
Request for Comments: 7715 K. Raza
Category: Standards Track Cisco Systems, Inc.
ISSN: 2070-1721 A. Atlas
Juniper Networks, Inc.
J. Tantsura
Ericsson
Q. Zhao
Huawei Technology
January 2016
Multipoint LDP (mLDP) Node Protection
Abstract
This document describes procedures to support node protection for
Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths
(P2MP and MP2MP LSPs) that have been built by the Multipoint Label
Distribution Protocol (mLDP). In order to protect a node N, the
Point of Local Repair (PLR) Label Switching Router (LSR) of N must
learn the Merge Point (MPT) LSR(s) of node N such that traffic can be
redirected to them in case node N fails. Redirecting the traffic
around the failed node N depends on existing Point-to-Point (P2P)
Label Switched Paths (LSPs). The pre-established LSPs originate from
the PLR LSR and terminate on the MPT LSRs while bypassing LSR N.
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/rfc7715.
Wijnands, et al. Standards Track [Page 1]
RFC 7715 mLDP Node Protection January 2016
Copyright Notice
Copyright (c) 2016 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 they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Conventions Used in This Document . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
2. PLR Determination . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Transit Node Procedure . . . . . . . . . . . . . . . . . . 5
2.2. MP2MP Root Node Procedure . . . . . . . . . . . . . . . . 6
2.3. PLR Information Encoding . . . . . . . . . . . . . . . . . 7
3. Using the tLDP Session . . . . . . . . . . . . . . . . . . . . 9
4. Link or Node Failure . . . . . . . . . . . . . . . . . . . . . 10
4.1. Reconvergence after Node or Link Failure . . . . . . . . . 11
4.1.1. Node Failure . . . . . . . . . . . . . . . . . . . . . 12
4.1.2. Link Failure . . . . . . . . . . . . . . . . . . . . . 12
4.1.3. Switching to New Primary Path . . . . . . . . . . . . 12
5. mLDP Capabilities for Node Protection . . . . . . . . . . . . 13
5.1. PLR Capability . . . . . . . . . . . . . . . . . . . . . . 13
5.2. MPT Capability . . . . . . . . . . . . . . . . . . . . . . 14
5.3. The Protected LSR . . . . . . . . . . . . . . . . . . . . 14
5.4. The Node Protection Capability . . . . . . . . . . . . . . 15
6. Security Considerations . . . . . . . . . . . . . . . . . . . 16
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1. Normative References . . . . . . . . . . . . . . . . . . . 17
8.2. Informative References . . . . . . . . . . . . . . . . . . 17
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 18
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 19
Wijnands, et al. Standards Track [Page 2]
RFC 7715 mLDP Node Protection January 2016
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