Updates to MPLS Transport Profile Linear Protection
RFC 7324
| Document | Type |
RFC - Proposed Standard
(July 2014; No errata)
Updates RFC 6378
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-osborne-mpls-psc-updates | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Loa Andersson | ||
| Shepherd write-up | Show (last changed 2014-03-14) | ||
| IESG | IESG state | RFC 7324 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Adrian Farrel | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) E. Osborne
Request for Comments: 7324 July 2014
Updates: 6378
Category: Standards Track
ISSN: 2070-1721
Updates to MPLS Transport Profile Linear Protection
Abstract
This document contains a number of updates to the Protection State
Coordination (PSC) logic defined in RFC 6378, "MPLS Transport Profile
(MPLS-TP) Linear Protection". These updates provide some rules and
recommendations around the use of TLVs in PSC, address some issues
raised in an ITU-T liaison statement, and clarify PSC's behavior in a
case not well explained in RFC 6378.
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 5741.
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/rfc7324.
Copyright Notice
Copyright (c) 2014 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.
Osborne Standards Track [Page 1]
RFC 7324 PSC Updates July 2014
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Message Formatting and Error Handling . . . . . . . . . . . . 3
2.1. PSC TLV Format . . . . . . . . . . . . . . . . . . . . . 3
2.2. Error Handling . . . . . . . . . . . . . . . . . . . . . 4
2.2.1. Malformed Messages . . . . . . . . . . . . . . . . . 4
2.2.2. Well-Formed but Unknown or Unexpected TLV . . . . . . 4
3. Incorrect Local Status after Failure . . . . . . . . . . . . 5
4. Handling a Capabilities Mismatch . . . . . . . . . . . . . . 5
4.1. Protection Type Mismatch . . . . . . . . . . . . . . . . 5
4.2. R Mismatch . . . . . . . . . . . . . . . . . . . . . . . 6
4.3. Unsupported Modes . . . . . . . . . . . . . . . . . . . . 6
5. Reversion Deadlock Due to a Race Condition . . . . . . . . . 7
6. Clarifying PSC's Behavior in the Face of Multiple Inputs . . 8
7. Security Considerations . . . . . . . . . . . . . . . . . . . 10
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 10
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
10.1. Normative References . . . . . . . . . . . . . . . . . . 10
10.2. Informative References . . . . . . . . . . . . . . . . . 10
1. Introduction
This document contains a number of updates to PSC [RFC6378]. One
provides some rules and recommendations around the use of TLVs in
PSC. Three of the updates address issues #2, #7, and #8 as
identified in the ITU's liaison statement "Recommendation ITU-T
G.8131/Y.1382 revision - Linear protection switching for MPLS-TP
networks" [LIAISON]. Another clears up a behavior that was not well
explained in RFC 6378. These updates are not changes to the
protocol's packet format or to PSC's design; they are corrections and
clarifications to specific aspects of the protocol's procedures.
This document does not introduce backward compatibility issues with
implementations of RFC 6378.
It should be noted that [RFC7271] contains protocol mechanisms for an
alternate mode of operating MPLS-TP PSC. Those modes are built on
the message structures and procedures of [RFC6378], and so, while
this document does not update [RFC7271], it has an impact on that
work through its update to [RFC6378].
This document assumes familiarity with RFC 6378 and its terms,
conventions, and acronyms. Any term used in this document but not
defined herein can be found in RFC 6378. In particular, this
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