PCEP Extensions for Associated Bidirectional Label Switched Paths (LSPs)
draft-ietf-pce-association-bidir-03
PCE Working Group R. Gandhi, Ed.
Internet-Draft Cisco Systems, Inc.
Intended status: Standards Track C. Barth
Expires: September 12, 2019 Juniper Networks
B. Wen
Comcast
March 11, 2019
PCEP Extensions for
Associated Bidirectional Label Switched Paths (LSPs)
draft-ietf-pce-association-bidir-03
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. The procedures defined are
applicable to the LSPs using Resource Reservation Protocol (RSVP) for
signaling.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
Barth, et al. Expires September 12, 2019 [Page 1]
Internet-Draft PCEP For Associated Bidirectional LSP March 11, 2019
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 . . . . . . . . . . . . . . . . . . . . . . . . . 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. Bidirectional (B) Flag . . . . . . . . . . . . . . . . . . 11
5.5. PLSP-ID Usage . . . . . . . . . . . . . . . . . . . . . . 11
5.6. State Synchronization . . . . . . . . . . . . . . . . . . 12
5.7. Error Handling . . . . . . . . . . . . . . . . . . . . . . 12
6. Security Considerations . . . . . . . . . . . . . . . . . . . 13
7. Manageability Considerations . . . . . . . . . . . . . . . . . 13
7.1. Control of Function and Policy . . . . . . . . . . . . . . 13
7.2. Information and Data Models . . . . . . . . . . . . . . . 13
7.3. Liveness Detection and Monitoring . . . . . . . . . . . . 13
7.4. Verify Correct Operations . . . . . . . . . . . . . . . . 13
7.5. Requirements On Other Protocols . . . . . . . . . . . . . 13
7.6. Impact On Network Operations . . . . . . . . . . . . . . . 14
Show full document text