PCEP Extensions for Associated Bidirectional Label Switched Paths (LSPs)
draft-ietf-pce-association-bidir-01
PCE Working Group C. Barth
Internet-Draft Juniper Networks
Intended status: Standards Track R. Gandhi, Ed.
Expires: November 19, 2018 Cisco Systems, Inc.
B. Wen
Comcast
May 18, 2018
PCEP Extensions for
Associated Bidirectional Label Switched Paths (LSPs)
draft-ietf-pce-association-bidir-01
Abstract
The Path Computation Element Communication Protocol (PCEP) provides
mechanisms for Path Computation Elements (PCEs) to perform path
computations in response to Path Computation Clients (PCCs) requests.
The Stateful PCE extensions allow stateful control of Multiprotocol
Label Switching (MPLS) Traffic Engineering (TE) Label Switched Paths
(LSPs) using PCEP.
This document defines PCEP extensions for grouping two reverse
unidirectional MPLS TE LSPs into an Associated Bidirectional LSP when
using a Stateful PCE for both PCE-Initiated and PCC-Initiated LSPs as
well as when using a Stateless PCE.
Status of This Memo
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Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved.
Barth, et al. Expires November 19, 2018 [Page 1]
Internet-Draft PCEP For Associated Bidirectional LSPs May 18, 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions Used in This Document . . . . . . . . . . . . . . 4
2.1. Key Word Definitions . . . . . . . . . . . . . . . . . . . 4
2.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Single-sided Initiation . . . . . . . . . . . . . . . . . 5
3.2. Double-sided Initiation . . . . . . . . . . . . . . . . . 6
3.3. Co-routed Associated Bidirectional LSP . . . . . . . . . . 7
4. Protocol Extensions . . . . . . . . . . . . . . . . . . . . . 8
4.1. Association Object . . . . . . . . . . . . . . . . . . . . 8
4.2. Bidirectional LSP Association Group TLV . . . . . . . . . 9
5. PCEP Procedure . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1. PCE Initiated LSPs . . . . . . . . . . . . . . . . . . . . 10
5.2. PCC Initiated LSPs . . . . . . . . . . . . . . . . . . . . 10
5.3. Stateless PCE . . . . . . . . . . . . . . . . . . . . . . 11
5.4. State Synchronization . . . . . . . . . . . . . . . . . . 11
5.5. Error Handling . . . . . . . . . . . . . . . . . . . . . . 11
6. Security Considerations . . . . . . . . . . . . . . . . . . . 12
7. Manageability Considerations . . . . . . . . . . . . . . . . . 12
7.1. Control of Function and Policy . . . . . . . . . . . . . . 12
7.2. Information and Data Models . . . . . . . . . . . . . . . 12
7.3. Liveness Detection and Monitoring . . . . . . . . . . . . 12
7.4. Verify Correct Operations . . . . . . . . . . . . . . . . 12
7.5. Requirements On Other Protocols . . . . . . . . . . . . . 13
7.6. Impact On Network Operations . . . . . . . . . . . . . . . 13
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
8.1. Association Types . . . . . . . . . . . . . . . . . . . . 13
8.2. Bidirectional LSP Association Group TLV . . . . . . . . . 13
8.2.1. Flag Fields in Bidirectional LSP Association Group
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