Applicability of the Path Computation Element (PCE) to the Abstraction and Control of TE Networks (ACTN)
RFC 8637
| Document | Type | RFC - Informational (July 2019; No errata) | |
|---|---|---|---|
| Authors | Dhruv Dhody , Young Lee , Daniele Ceccarelli | ||
| Last updated | 2019-07-10 | ||
| Replaces | draft-dhody-pce-applicability-actn | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Adrian Farrel | ||
| Shepherd write-up | Show (last changed 2019-03-12) | ||
| IESG | IESG state | RFC 8637 (Informational) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Deborah Brungard | ||
| Send notices to | Adrian Farrel <adrian@olddog.co.uk> | ||
| IANA | IANA review state | IANA OK - No Actions Needed | |
| IANA action state | No IANA Actions | ||
Internet Engineering Task Force (IETF) D. Dhody
Request for Comments: 8637 Huawei Technologies
Category: Informational Y. Lee
ISSN: 2070-1721 Futurewei Technologies
D. Ceccarelli
Ericsson
July 2019
Applicability of the Path Computation Element (PCE)
to the Abstraction and Control of TE Networks (ACTN)
Abstract
Abstraction and Control of TE Networks (ACTN) refers to the set of
virtual network (VN) operations needed to orchestrate, control, and
manage large-scale multidomain TE networks so as to facilitate
network programmability, automation, efficient resource sharing, and
end-to-end virtual service-aware connectivity and network function
virtualization services.
The Path Computation Element (PCE) is a component, application, or
network node that is capable of computing a network path or route
based on a network graph and applying computational constraints. The
PCE serves requests from Path Computation Clients (PCCs) that
communicate with it over a local API or using the Path Computation
Element Communication Protocol (PCEP).
This document examines the applicability of PCE to the ACTN
framework.
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 candidates 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
https://www.rfc-editor.org/info/rfc8637.
Dhody, et al. Informational [Page 1]
RFC 8637 PCE-ACTN July 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Background Information . . . . . . . . . . . . . . . . . . . 3
2.1. Path Computation Element (PCE) . . . . . . . . . . . . . 3
2.1.1. Role of PCE in SDN . . . . . . . . . . . . . . . . . 4
2.1.2. PCE in Multidomain and Multilayer Deployments . . . . 4
2.1.3. Relationship to PCE-Based Central Control . . . . . . 5
2.2. Abstraction and Control of TE Networks (ACTN) . . . . . . 5
3. Architectural Considerations . . . . . . . . . . . . . . . . 7
3.1. Multidomain Coordination via Hierarchy . . . . . . . . . 7
3.2. Abstraction . . . . . . . . . . . . . . . . . . . . . . . 8
3.3. Customer Mapping . . . . . . . . . . . . . . . . . . . . 9
3.4. Virtual Service Coordination . . . . . . . . . . . . . . 10
4. Interface Considerations . . . . . . . . . . . . . . . . . . 10
5. Realizing ACTN with PCE (and PCEP) . . . . . . . . . . . . . 11
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
7. Security Considerations . . . . . . . . . . . . . . . . . . . 15
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.1. Normative References . . . . . . . . . . . . . . . . . . 16
8.2. Informative References . . . . . . . . . . . . . . . . . 16
Appendix A. Additional Information . . . . . . . . . . . . . . . 21
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 22
1. Introduction
Abstraction and Control of TE Networks (ACTN) [RFC8453] refers to the
set of virtual network (VN) operations needed to orchestrate,
control, and manage large-scale multidomain TE networks so as to
facilitate network programmability, automation, efficient resource
sharing, and end-to-end virtual service-aware connectivity and
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