Extensions to PCEP for Distributing Label Cross Domains
draft-chen-pce-label-x-domains-09

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Last updated 2019-07-07
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PCE Working Group                                                H. Chen
Internet-Draft                                                 Futurewei
Intended status: Standards Track                                  A. Liu
Expires: January 8, 2020                                           Ciena
                                                                  M. Toy
                                                                 Verizon
                                                                  V. Liu
                                                            July 7, 2019

        Extensions to PCEP for Distributing Label Cross Domains
                   draft-chen-pce-label-x-domains-09

Abstract

   This document specifies extensions to PCEP for distributing labels
   crossing domains for an inter-domain Point-to-Point (P2P) or Point-
   to-Multipoint (P2MP) Traffic Engineering (TE) Label Switched Path
   (LSP).

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   This Internet-Draft will expire on January 8, 2020.

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   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Conventions Used in This Document . . . . . . . . . . . . . .   3
   4.  Label Distribution  . . . . . . . . . . . . . . . . . . . . .   3
     4.1.  An Exmaple  . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Extensions to PCEP  . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  RP Object Extension . . . . . . . . . . . . . . . . . . .   5
     5.2.  Label Object  . . . . . . . . . . . . . . . . . . . . . .   6
     5.3.  LSP Tunnel Object . . . . . . . . . . . . . . . . . . . .   7
     5.4.  Request Message Extension . . . . . . . . . . . . . . . .   8
     5.5.  Reply Message Extension . . . . . . . . . . . . . . . . .   9
   6.  Security  Considerations  . . . . . . . . . . . . . . . . . .   9
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
     7.1.  Request Parameter Bit Flags . . . . . . . . . . . . . . .   9
   8.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   After a path crossing multiple domains is computed, an inter-domain
   Traffic Engineering (TE) Label Switched Path (LSP) tunnel may be set
   up along the path by a number of tunnel central controllers (TCCs).
   Each of the domains through which the path goes may be controlled by
   a tunnel central controller (TCC), which sets up the segment of the
   TE LSP tunnel in the domain.  When the TCC sets up the segment of the
   TE LSP tunnel in its domain that is not a domain containing the tail
   end of the tunnel, it needs a label and an interface from a
   downstream domain, which is next to it along the path.

   This document specifies extensions to PCEP for distributing a label
   and an interface from a domain to its upstream domain along the path
   for the TE LSP tunnel crossing multiple domains.

2.  Terminology

   ABR: Area Border Router.  Routers used to connect two IGP areas
   (areas in OSPF or levels in IS-IS).

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