PCEP Extension for Stateful Inter-Domain Tunnels
draft-dugeon-pce-stateful-interdomain-01

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Last updated 2018-07-02
Replaces draft-dugeon-brpc-stateful
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Path Computation Element Working Group                         O. Dugeon
Internet-Draft                                                 J. Meuric
Intended status: Standards Track                             Orange Labs
Expires: January 3, 2019                                          Y. Lee
                                                                D. Dhody
                                                     Huawei Technologies
                                                           D. Ceccarelli
                                                                Ericsson
                                                           July 02, 2018

            PCEP Extension for Stateful Inter-Domain Tunnels
                draft-dugeon-pce-stateful-interdomain-01

Abstract

   This document proposes to combine a Backward Recursive or
   Hierarchical method in Stateful PCE with PCInitiate message to setup
   independent paths per domain, and combine these different paths
   together in order to operate them as end-to-end inter-domain paths
   without the need of signaling session between AS border routers.  A
   new Stitching Label is defined and new LSP-TYPE code points are
   considered for that purpose.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of This Memo

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   This Internet-Draft will expire on January 3, 2019.

Dugeon, et al.           Expires January 3, 2019                [Page 1]
Internet-Draft      PCE Stateful Inter-Domain Tunnels          July 2018

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Table of Contents

   1.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  General assumptions . . . . . . . . . . . . . . . . . . .   5
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   6
   2.  Stitching Label . . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  Definition  . . . . . . . . . . . . . . . . . . . . . . .   7
     2.2.  Inter-domain LSP-TYPE . . . . . . . . . . . . . . . . . .   8
   3.  Backward Recursive PCInitiate procedure . . . . . . . . . . .   9
     3.1.  Mode of operation . . . . . . . . . . . . . . . . . . . .   9
     3.2.  Example . . . . . . . . . . . . . . . . . . . . . . . . .  11
     3.3.  Inter-domain LSP setup procedure completion failure . . .  13
   4.  Hierarchical PCInitiate procedure . . . . . . . . . . . . . .  14
     4.1.  Mode of operation . . . . . . . . . . . . . . . . . . . .  14
     4.2.  Inter-domain LSP setup procedure completion failure . . .  16
     4.3.  Example for Stateful H-PCE Stiching procedure . . . . . .  17
   5.  Inter-domain LSP Management . . . . . . . . . . . . . . . . .  21
     5.1.  Identification of inter-domain tunnels  . . . . . . . . .  21
     5.2.  Inter-domain LSP management . . . . . . . . . . . . . . .  21
     5.3.  Modification of inter-domain LSP  . . . . . . . . . . . .  22
     5.4.  Removal of inter-domain LSP . . . . . . . . . . . . . . .  22
   6.  Applicability . . . . . . . . . . . . . . . . . . . . . . . .  23
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  24
     7.1.  LSP-TYPE values . . . . . . . . . . . . . . . . . . . . .  24
     7.2.  PCEP-Error Object . . . . . . . . . . . . . . . . . . . .  24
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  25
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  25
   10. Disclaimer  . . . . . . . . . . . . . . . . . . . . . . . . .  25
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  25
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