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GMPLS Asymmetric Bandwidth Bidirectional Label Switched Paths (LSPs)
RFC 6387

Internet Engineering Task Force (IETF)                         A. Takacs
Request for Comments: 6387                                      Ericsson
Obsoletes: 5467                                                L. Berger
Category:  Standards Track                       LabN Consulting, L.L.C.
ISSN:  2070-1721                                             D. Caviglia
                                                                Ericsson
                                                                D. Fedyk
                                                          Alcatel-Lucent
                                                               J. Meuric
                                                   France Telecom Orange
                                                          September 2011

  GMPLS Asymmetric Bandwidth Bidirectional Label Switched Paths (LSPs)

Abstract

   This document defines a method for the support of GMPLS asymmetric
   bandwidth bidirectional Label Switched Paths (LSPs).  The approach
   presented is applicable to any switching technology and builds on the
   original Resource Reservation Protocol (RSVP) model for the transport
   of traffic-related parameters.  This document moves the experiment
   documented in RFC 5467 to the standards track and obsoletes RFC 5467.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6387.

Takacs, et. al.              Standards Track                    [Page 1]
RFC 6387         Asymmetric Bandwidth Bidirectional LSP   September 2011

Copyright Notice

   Copyright (c) 2011 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
   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 . . . . . . . . . . . . . . . . . . . . . . . . .  2
     1.1.  Background . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.2.  Approach Overview  . . . . . . . . . . . . . . . . . . . .  3
     1.3.  Conventions Used in This Document  . . . . . . . . . . . .  4
   2.  Generalized Asymmetric Bandwidth Bidirectional LSPs  . . . . .  4
     2.1.  UPSTREAM_FLOWSPEC Object . . . . . . . . . . . . . . . . .  5
       2.1.1.  Procedures . . . . . . . . . . . . . . . . . . . . . .  5
     2.2.  UPSTREAM_TSPEC Object  . . . . . . . . . . . . . . . . . .  5
       2.2.1.  Procedures . . . . . . . . . . . . . . . . . . . . . .  5
     2.3.  UPSTREAM_ADSPEC Object . . . . . . . . . . . . . . . . . .  6
       2.3.1.  Procedures . . . . . . . . . . . . . . . . . . . . . .  6
   3.  Packet Formats . . . . . . . . . . . . . . . . . . . . . . . .  6
   4.  Compatibility  . . . . . . . . . . . . . . . . . . . . . . . .  7
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  8
     5.1.  UPSTREAM_FLOWSPEC Object . . . . . . . . . . . . . . . . .  8
     5.2.  UPSTREAM_TSPEC Object  . . . . . . . . . . . . . . . . . .  8
     5.3.  UPSTREAM_ADSPEC Object . . . . . . . . . . . . . . . . . .  8
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . .  8
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     7.1.  Normative References . . . . . . . . . . . . . . . . . . .  9
     7.2.  Informative References . . . . . . . . . . . . . . . . . .  9

1.  Introduction

   GMPLS [RFC3473] introduced explicit support for bidirectional Label
   Switched Paths (LSPs).  The defined support matched the switching
   technologies covered by GMPLS, notably Time Division Multiplexing
   (TDM) and lambdas; specifically, it only supported bidirectional LSPs
   with symmetric bandwidth allocation.  Symmetric bandwidth
   requirements are conveyed using the semantics objects defined in
   [RFC2205] and [RFC2210].

Takacs, et. al.              Standards Track                    [Page 2]

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