Conveying Path Setup Type in PCE Communication Protocol (PCEP) Messages
RFC 8408
Internet Engineering Task Force (IETF) S. Sivabalan
Request for Comments: 8408 Cisco Systems, Inc.
Category: Standards Track J. Tantsura
ISSN: 2070-1721 Nuage Networks
I. Minei
Google, Inc.
R. Varga
Pantheon Technologies SRO
J. Hardwick
Metaswitch Networks
July 2018
Conveying Path Setup Type
in PCE Communication Protocol (PCEP) Messages
Abstract
A Path Computation Element (PCE) can compute Traffic Engineering (TE)
paths through a network; these paths are subject to various
constraints. Currently, TE paths are Label Switched Paths (LSPs)
that are set up using the RSVP-TE signaling protocol. However, other
TE path setup methods are possible within the PCE architecture. This
document proposes an extension to the PCE Communication Protocol
(PCEP) to allow support for different path setup methods over a given
PCEP session.
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/rfc8408.
Sivabalan, et al. Standards Track [Page 1]
RFC 8408 PCE Path Setup Type July 2018
Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Path Setup Type Capability TLV . . . . . . . . . . . . . . . 4
4. Path Setup Type TLV . . . . . . . . . . . . . . . . . . . . . 6
5. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6. Manageability Considerations . . . . . . . . . . . . . . . . 8
7. Security Considerations . . . . . . . . . . . . . . . . . . . 9
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
8.1. Additions to PCEP TLV Type Indicators Registry . . . . . 9
8.2. New PCEP Path Setup Types Registry . . . . . . . . . . . 9
8.3. Additions to PCEP-ERROR Object Error Types and Values
Registry . . . . . . . . . . . . . . . . . . . . . . . . 10
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.1. Normative References . . . . . . . . . . . . . . . . . . 10
9.2. Informative References . . . . . . . . . . . . . . . . . 11
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 11
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
Sivabalan, et al. Standards Track [Page 2]
RFC 8408 PCE Path Setup Type July 2018
1. Introduction
[RFC5440] describes the PCE Communication Protocol (PCEP) for
communication between a Path Computation Client (PCC) and a Path
Computation Element (PCE) or between a PCE and a PCE. A PCC
requests, from a PCE, a path subject to various constraints and
optimization criteria. The PCE responds to the PCC with a hop-by-hop
path in an Explicit Route Object (ERO). The PCC uses the ERO to set
up the path in the network.
[RFC8231] specifies extensions to PCEP that allow a PCC to delegate
its LSPs to a PCE. The PCE can then update the state of LSPs
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