PCEP Extensions for Associated Bidirectional Label Switched Paths (LSPs)
draft-ietf-pce-association-bidir-02

Document Type Active Internet-Draft (pce WG)
Last updated 2018-11-14
Replaces draft-barth-pce-association-bidir
Stream IETF
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
PCE Working Group                                               C. Barth
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                          R. Gandhi, Ed.
Expires: May 18, 2019                                Cisco Systems, Inc.
                                                                  B. Wen
                                                                 Comcast
                                                       November 14, 2018

                         PCEP Extensions for 
         Associated Bidirectional Label Switched Paths (LSPs)
                draft-ietf-pce-association-bidir-02 

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

   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) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.
 

Barth, et al.             Expires May 18, 2019                  [Page 1]
Internet-Draft   PCEP For Associated Bidirectional LSPsNovember 14, 2018

   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.  State Synchronization  . . . . . . . . . . . . . . . . . . 11
     5.6.  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  . . . . . . . . . . . . 13
     7.4.  Verify Correct Operations  . . . . . . . . . . . . . . . . 13
     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
Show full document text