PCC-PCE Communication and PCE Discovery Requirements for Inter-Layer Traffic Engineering
RFC 6457
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RFC - Informational
(December 2011; No errata)
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Last updated |
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2015-10-14
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IETF
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WG Document
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No shepherd assigned
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RFC 6457 (Informational)
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Unknown
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Responsible AD |
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Stewart Bryant
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Julien Meuric (julien.meuric@orange-ftgroup.com) is the document shepherd.
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(None)
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Internet Engineering Task Force (IETF) T. Takeda, Ed.
Request for Comments: 6457 NTT
Category: Informational A. Farrel
ISSN: 2070-1721 Old Dog Consulting
December 2011
PCC-PCE Communication and PCE Discovery Requirements for
Inter-Layer Traffic Engineering
Abstract
The Path Computation Element (PCE) provides functions of path
computation in support of traffic engineering in networks controlled
by Multi-Protocol Label Switching (MPLS) and Generalized MPLS
(GMPLS).
MPLS and GMPLS networks may be constructed from layered client/server
networks. It is advantageous for overall network efficiency to
provide end-to-end traffic engineering across multiple network
layers. PCE is a candidate solution for such requirements.
Generic requirements for a communication protocol between Path
Computation Clients (PCCs) and PCEs are presented in RFC 4657, "Path
Computation Element (PCE) Communication Protocol Generic
Requirements". Generic requirements for a PCE discovery protocol are
presented in RFC 4674, "Requirements for Path Computation Element
(PCE) Discovery".
This document complements the generic requirements and presents
detailed sets of PCC-PCE communication protocol requirements and PCE
discovery protocol requirements for inter-layer traffic engineering.
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 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/rfc6457.
Takeda, et al. Informational [Page 1]
RFC 6457 PCE Inter-Layer Requirements December 2011
Copyright Notice
Copyright (c) 2011 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.
Table of Contents
1. Introduction ....................................................2
1.1. Terminology ................................................3
2. Motivation for PCE-Based Inter-Layer Path Computation ...........4
3. PCC-PCE Communication and Discovery Requirements for
Inter-Layer .....................................................4
3.1. PCC-PCE Communication ......................................5
3.1.1. Control of Inter-Layer Path Computation .............5
3.1.2. Control of the Type of Path to Be Computed ..........5
3.1.3. Communication of Inter-Layer Constraints ............6
3.1.4. Adaptation Capability ...............................7
3.1.5. Cooperation between PCEs ............................7
3.1.6. Inter-Layer Diverse Paths ...........................7
3.2. Capabilities Advertisements for PCE Discovery ..............7
3.3. Supported Network Models ...................................8
4. Manageability Considerations ....................................8
4.1. Control of Function and Policy .............................8
4.2. Information and Data Models ................................8
4.3. Liveness Detection and Monitoring ..........................8
4.4. Verifying Correct Operation ................................9
4.5. Requirements on Other Protocols and Functional Components ..9
4.6. Impact on Network Operation ................................9
5. Security Considerations ........................................10
6. Acknowledgments ................................................10
7. References .....................................................10
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