Extensions to RSVP-TE for Label Switched Path (LSP) Egress Protection
RFC 8400
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Type |
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RFC - Proposed Standard
(June 2018; Errata)
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Last updated |
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2018-06-21
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Replaces |
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draft-ietf-mpls-rsvp-egress-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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Vishnu Beeram
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Shepherd write-up |
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Show
(last changed 2017-11-03)
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| IESG |
IESG state |
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RFC 8400 (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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Vishnu Beeram <vishnupavan@gmail.com>
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| IANA |
IANA review state |
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IANA OK - Actions Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) H. Chen
Request for Comments: 8400 Huawei Technologies
Category: Standards Track A. Liu
ISSN: 2070-1721 Ciena
T. Saad
Cisco Systems
F. Xu
Verizon
L. Huang
China Mobile
June 2018
Extensions to RSVP-TE for Label Switched Path (LSP) Egress Protection
Abstract
This document describes extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for locally protecting the egress
node(s) of a Point-to-Point (P2P) or Point-to-Multipoint (P2MP)
Traffic Engineered (TE) Label Switched Path (LSP).
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
https://www.rfc-editor.org/info/rfc8400.
Copyright Notice
Copyright (c) 2018 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
(https://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.
Chen, et al. Standards Track [Page 1]
RFC 8400 RSVP LSP Egress Protection June 2018
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Local Protection of Egress Nodes . . . . . . . . . . . . 3
2. Conventions Used in This Document . . . . . . . . . . . . . . 4
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Protocol Extensions . . . . . . . . . . . . . . . . . . . . . 5
4.1. Extensions to SERO . . . . . . . . . . . . . . . . . . . 5
4.1.1. Primary Egress Subobject . . . . . . . . . . . . . . 7
4.1.2. P2P LSP ID Subobject . . . . . . . . . . . . . . . . 8
5. Egress Protection Behaviors . . . . . . . . . . . . . . . . . 9
5.1. Ingress Behavior . . . . . . . . . . . . . . . . . . . . 9
5.2. Primary Egress Behavior . . . . . . . . . . . . . . . . . 10
5.3. Backup Egress Behavior . . . . . . . . . . . . . . . . . 10
5.4. Transit Node and PLR Behavior . . . . . . . . . . . . . . 11
5.4.1. Signaling for One-to-One Protection . . . . . . . . . 12
5.4.2. Signaling for Facility Protection . . . . . . . . . . 12
5.4.3. Signaling for S2L Sub-LSP Protection . . . . . . . . 13
5.4.4. PLR Procedures during Local Repair . . . . . . . . . 14
6. Application Traffic Considerations . . . . . . . . . . . . . 14
6.1. A Typical Application . . . . . . . . . . . . . . . . . . 14
6.2. PLR Procedure for Applications . . . . . . . . . . . . . 17
6.3. Egress Procedures for Applications . . . . . . . . . . . 17
7. Security Considerations . . . . . . . . . . . . . . . . . . . 17
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 18
9.1. Normative References . . . . . . . . . . . . . . . . . . 18
9.2. Informative References . . . . . . . . . . . . . . . . . 19
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 19
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction
[RFC4090] describes two methods for locally protecting the transit
nodes of a P2P LSP: one-to-one and facility protection. [RFC4875]
specifies how these methods can be used to protect the transit nodes
of a P2MP LSP. These documents do not discuss the procedures for
locally protecting the egress node(s) of an LSP.
This document fills that void and specifies extensions to RSVP-TE for
local protection of the egress node(s) of an LSP. "Egress node" and
"egress" are used interchangeably.
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