Path Computation Element communication Protocol extension for signaling LSP diversity constraint
draft-ietf-pce-association-diversity-02

Document Type Active Internet-Draft (pce WG)
Last updated 2017-09-11
Replaces draft-litkowski-pce-association-diversity
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PCE Working Group                                           S. Litkowski
Internet-Draft                                                    Orange
Intended status: Standards Track                            S. Sivabalan
Expires: March 15, 2018                              Cisco Systems, Inc.
                                                                C. Barth
                                                        Juniper Networks
                                                                D. Dhody
                                                                  Huawei
                                                      September 11, 2017

Path Computation Element communication Protocol extension for signaling
                        LSP diversity constraint
                draft-ietf-pce-association-diversity-02

Abstract

   This document introduces a simple mechanism to associate a group of
   Label Switched Paths (LSPs) via an extension to the Path Computation
   Element Communication Protocol (PCEP) with the purpose of computing
   diverse paths for those LSPs.  The proposed extension allows a PCC to
   advertise to a PCE the belonging of a particular LSP to a disjoint-
   group, thus the PCE knows that LSPs in the same group must be
   disjoint from each other.

Status of This Memo

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   This Internet-Draft will expire on March 15, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Litkowski, et al.        Expires March 15, 2018                 [Page 1]
Internet-Draft               ASSOC-DISJOINT               September 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Motivation  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Protocol extension  . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Association group . . . . . . . . . . . . . . . . . . . .   7
     4.2.  Mandatory TLV . . . . . . . . . . . . . . . . . . . . . .   7
     4.3.  Optional TLVs . . . . . . . . . . . . . . . . . . . . . .   9
     4.4.  Disjointness objective functions  . . . . . . . . . . . .   9
     4.5.  P-flag considerations . . . . . . . . . . . . . . . . . .   9
     4.6.  Disjointness computation issues . . . . . . . . . . . . .  12
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  Association object Type Indicators  . . . . . . . . . . .  13
     6.2.  PCEP TLVs . . . . . . . . . . . . . . . . . . . . . . . .  14
     6.3.  NO-PATH-VECTOR bit Flags  . . . . . . . . . . . . . . . .  14
     6.4.  PCEP-ERROR codes  . . . . . . . . . . . . . . . . . . . .  14
   7.  Manageability Considerations  . . . . . . . . . . . . . . . .  15
     7.1.  Control of Function and Policy  . . . . . . . . . . . . .  15
     7.2.  Information and Data Models . . . . . . . . . . . . . . .  15
     7.3.  Liveness Detection and Monitoring . . . . . . . . . . . .  15
     7.4.  Verify Correct Operations . . . . . . . . . . . . . . . .  15
     7.5.  Requirements On Other Protocols . . . . . . . . . . . . .  15
     7.6.  Impact On Network Operations  . . . . . . . . . . . . . .  15
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  15
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  16
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