Updates to the Resource Reservation Protocol for Fast Reroute of Traffic Engineering GMPLS Label Switched Paths (LSPs)
RFC 8271
| Document | Type |
RFC - Proposed Standard
(October 2017; No errata)
Updates RFC 4090
|
|
|---|---|---|---|
| Last updated | 2017-10-31 | ||
| Replaces | draft-tsaad-ccamp-rsvpte-bidir-lsp-fastreroute | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Vishnu Beeram | ||
| Shepherd write-up | Show (last changed 2017-03-24) | ||
| IESG | IESG state | RFC 8271 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Deborah Brungard | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) M. Taillon
Request for Comments: 8271 T. Saad, Ed.
Updates: 4090 R. Gandhi, Ed.
Category: Standards Track Z. Ali
ISSN: 2070-1721 Cisco Systems, Inc.
M. Bhatia
Nokia
October 2017
Updates to the Resource Reservation Protocol for Fast Reroute of
Traffic Engineering GMPLS Label Switched Paths (LSPs)
Abstract
This document updates the Resource Reservation Protocol - Traffic
Engineering (RSVP-TE) Fast Reroute (FRR) procedures defined in RFC
4090 to support Packet Switch Capable (PSC) Generalized Multiprotocol
Label Switching (GMPLS) Label Switched Paths (LSPs). These updates
allow the coordination of a bidirectional bypass tunnel assignment
protecting a common facility in both forward and reverse directions
of a co-routed bidirectional LSP. In addition, these updates enable
the redirection of bidirectional traffic onto bypass tunnels that
ensure the co-routing of data paths in the forward and reverse
directions after FRR and avoid RSVP soft-state timeout in the control
plane.
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/rfc8271.
Taillon, et al. Standards Track [Page 1]
RFC 8271 FRR for TE GMPLS LSPs October 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
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described in the Simplified BSD License.
Taillon, et al. Standards Track [Page 2]
RFC 8271 FRR for TE GMPLS LSPs October 2017
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Conventions Used in This Document . . . . . . . . . . . . . . 5
2.1. Key Word Definitions . . . . . . . . . . . . . . . . . . 5
2.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
2.3. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 6
3. Fast Reroute for Unidirectional GMPLS LSPs . . . . . . . . . 6
4. Bypass Tunnel Assignment for Bidirectional GMPLS LSPs . . . . 7
4.1. Bidirectional GMPLS Bypass Tunnel Direction . . . . . . . 7
4.2. Merge Point Labels . . . . . . . . . . . . . . . . . . . 7
4.3. Merge Point Addresses . . . . . . . . . . . . . . . . . . 7
4.4. RRO IPv4/IPv6 Subobject Flags . . . . . . . . . . . . . . 8
4.5. Bidirectional Bypass Tunnel Assignment Coordination . . . 8
4.5.1. Bidirectional Bypass Tunnel Assignment Signaling
Procedure . . . . . . . . . . . . . . . . . . . . . . 8
4.5.2. One-to-One Bidirectional Bypass Tunnel Assignment . . 10
4.5.3. Multiple Bidirectional Bypass Tunnel Assignments . . 10
5. Fast Reroute for Bidirectional GMPLS LSPs with In-Band
Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1. Link Protection for Bidirectional GMPLS LSPs . . . . . . 12
5.1.1. Behavior after Link Failure . . . . . . . . . . . . . 13
5.1.2. Revertive Behavior after Fast Reroute . . . . . . . . 13
5.2. Node Protection for Bidirectional GMPLS LSPs . . . . . . 13
5.2.1. Behavior after Link Failure . . . . . . . . . . . . . 14
5.2.2. Behavior after Link Failure to Restore Co-routing . . 14
5.2.3. Revertive Behavior after Fast Reroute . . . . . . . . 16
5.2.4. Behavior after Node Failure . . . . . . . . . . . . . 16
5.3. Unidirectional Link Failures . . . . . . . . . . . . . . 16
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