Dual-Homing Protection for MPLS and the MPLS Transport Profile (MPLS-TP) Pseudowires
RFC 8184
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RFC - Informational
(June 2017; No errata)
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Last updated |
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2017-06-26
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Replaces |
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draft-cheng-pwe3-mpls-tp-dual-homing-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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Stewart Bryant
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Shepherd write-up |
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Show
(last changed 2016-08-23)
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| IESG |
IESG state |
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RFC 8184 (Informational)
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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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"Stewart Bryant" <stewart.bryant@gmail.com>
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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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No IC
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Internet Engineering Task Force (IETF) W. Cheng
Request for Comments: 8184 L. Wang
Category: Informational H. Li
ISSN: 2070-1721 China Mobile
S. Davari
Broadcom Corporation
J. Dong
Huawei Technologies
June 2017
Dual-Homing Protection for
MPLS and the MPLS Transport Profile (MPLS-TP) Pseudowires
Abstract
This document describes a framework and several scenarios for a
pseudowire (PW) dual-homing local protection mechanism that avoids
unnecessary switchovers and does not depend on whether a control
plane is used. A Dual-Node Interconnection (DNI) PW is used to carry
traffic between the dual-homing Provider Edge (PE) nodes when a
failure occurs in one of the Attachment Circuits (AC) or PWs. This
PW dual-homing local protection mechanism is complementary to
existing PW protection mechanisms.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
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). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see 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/rfc8184.
Cheng, et al. Informational [Page 1]
RFC 8184 Dual-Homing PW Protection June 2017
Copyright Notice
Copyright (c) 2017 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
2. Reference Models of Dual-Homing Local Protection . . . . . . 4
2.1. PE Architecture . . . . . . . . . . . . . . . . . . . . . 4
2.2. Dual-Homing Local Protection Reference Scenarios . . . . 5
2.2.1. One-Side Dual-Homing Protection . . . . . . . . . . . 5
2.2.2. Two-Side Dual-Homing Protection . . . . . . . . . . . 6
3. Generic Dual-Homing PW Protection Mechanism . . . . . . . . . 8
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
5. Security Considerations . . . . . . . . . . . . . . . . . . . 9
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1. Normative References . . . . . . . . . . . . . . . . . . 9
6.2. Informative References . . . . . . . . . . . . . . . . . 9
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 11
Cheng, et al. Informational [Page 2]
RFC 8184 Dual-Homing PW Protection June 2017
1. Introduction
[RFC6372] and [RFC6378] describe the framework and mechanism of MPLS
Transport Profile (MPLS-TP) linear protection, which can provide
protection for the MPLS Label Switched Path (LSP) or pseudowire (PW)
between the edge nodes. This mechanism does not protect against
failure of the Attachment Circuit (AC) or the Provider Edge (PE)
node. [RFC6718] and [RFC6870] describe the framework and mechanism
for PW redundancy to provide protection against AC or PE node
failure. The PW redundancy mechanism is based on the signaling of
the Label Distribution Protocol (LDP), which is applicable to PWs
with a dynamic control plane. [RFC8104] describes a fast local
repair mechanism for PW egress endpoint failures, which is based on
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