Network Working Group L. Berger
Request for Comments: 4873 LabN Consulting
Updates: 3473, 4872 I. Bryskin
Category: Standards Track ADVA Optical
D. Papadimitriou
Alcatel
A. Farrel
Old Dog Consulting
May 2007
GMPLS Segment Recovery
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
This document describes protocol specific procedures for GMPLS
(Generalized Multi-Protocol Label Switching) RSVP-TE (Resource
ReserVation Protocol - Traffic Engineering) signaling extensions to
support label switched path (LSP) segment protection and restoration.
These extensions are intended to complement and be consistent with
the RSVP-TE Extensions for End-to-End GMPLS Recovery (RFC 4872).
Implications and interactions with fast reroute are also addressed.
This document also updates the handling of NOTIFY_REQUEST objects.
Berger, et al. Standards Track [Page 1]RFC 4873 GMPLS Segment Recovery May 2007Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................3
2. Segment Recovery ................................................4
2.1. Segment Protection .........................................6
2.2. Segment Re-routing and Restoration .........................6
3. ASSOCIATION Object ..............................................6
3.1. Format .....................................................7
3.2. Procedures .................................................7
3.2.1. Recovery Type Processing ............................7
3.2.2. Resource Sharing Association Type Processing ........7
4. Explicit Control of LSP Segment Recovery ........................8
4.1. Secondary Explicit Route Object Format .....................8
4.1.1. Protection Subobject ................................8
4.2. Explicit Control Procedures ................................9
4.2.1. Branch Failure Handling ............................10
4.2.2. Resv Message Processing ............................11
4.2.3. Admin Status Change ................................12
4.2.4. Recovery LSP Teardown ..............................12
4.3. Teardown From Non-Ingress Nodes ...........................12
4.3.1. Modified NOTIFY_REQUEST Object Processing ..........13
4.3.2. Modified Notify and Error Message Processing .......14
5. Secondary Record Route Objects .................................14
5.1. Format ....................................................14
5.2. Path Processing ...........................................15
5.3. Resv Processing ...........................................15
6. Dynamic Control of LSP Segment Recovery ........................16
6.1. Modified PROTECTION Object Format .........................16
6.2. Dynamic Control Procedures ................................17
7. Updated RSVP Message Formats ...................................18
8. Security Considerations ........................................20
9. IANA Considerations ............................................21
9.1. New Association Type Assignment ...........................21
9.2. Definition of PROTECTION Object Reserved Bits .............21
9.3. Secondary Explicit Route Object ...........................21
9.4. Secondary Record Route Object .............................21
9.5. New Error Code ............................................22
9.6. Use of PROTECTION Object C-type ...........................22
10. References ....................................................23
10.1. Normative References .....................................23
10.2. Informative References ...................................23
Berger, et al. Standards Track [Page 2]
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