RSVP-TE Signaling Procedure for End-to-End GMPLS Restoration and Resource Sharing
RFC 8131
Internet Engineering Task Force (IETF) X. Zhang
Request for Comments: 8131 H. Zheng, Ed.
Category: Informational Huawei Technologies
ISSN: 2070-1721 R. Gandhi, Ed.
Z. Ali
Cisco Systems, Inc.
P. Brzozowski
ADVA Optical
March 2017
RSVP-TE Signaling Procedure for
End-to-End GMPLS Restoration and Resource Sharing
Abstract
In non-packet transport networks, there are requirements where the
Generalized Multiprotocol Label Switching (GMPLS) end-to-end recovery
scheme needs to employ a restoration Label Switched Path (LSP) while
keeping resources for the working and/or protecting LSPs reserved in
the network after the failure occurs.
This document reviews how the LSP association is to be provided using
Resource Reservation Protocol - Traffic Engineering (RSVP-TE)
signaling in the context of a GMPLS end-to-end recovery scheme when
using restoration LSP where failed LSP is not torn down. In
addition, this document discusses resource sharing-based setup and
teardown of LSPs as well as LSP reversion procedures. No new
signaling extensions are defined by this document, and it is strictly
informative in nature.
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/rfc8131.
Zhang, et al. Informational [Page 1]
RFC 8131 GMPLS Restoration and Resource Sharing March 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
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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. Conventions Used in This Document ...............................4
2.1. Terminology ................................................4
2.2. Abbreviations ..............................................4
3. Overview ........................................................4
3.1. Examples of Restoration Schemes ............................5
3.1.1. 1+R Restoration .....................................5
3.1.2. 1+1+R Restoration ...................................6
3.1.2.1. 1+1+R Restoration - Variants ...............7
3.2. Resource Sharing by Restoration LSP ........................7
4. RSVP-TE Signaling Procedure .....................................8
4.1. Restoration LSP Association ................................8
4.2. Resource Sharing-Based Restoration LSP Setup ...............8
4.3. LSP Reversion .............................................10
4.3.1. Make-While-Break Reversion .........................10
4.3.2. Make-Before-Break Reversion ........................11
5. Security Considerations ........................................12
6. IANA Considerations ............................................13
7. References .....................................................13
7.1. Normative References ......................................13
7.2. Informative References ....................................13
Acknowledgements .................................................14
Contributors ......................................................14
Authors' Addresses ................................................15
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