General Network Element Constraint Encoding for GMPLS Controlled Networks
draft-ietf-ccamp-general-constraint-encode-07

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Last updated 2012-03-06
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Network Working Group                                      G. Bernstein
Internet Draft                                        Grotto Networking
Intended status: Standards Track                                 Y. Lee
Expires: September 2012                                           D. Li
                                                                 Huawei
                                                             W. Imajuku
                                                                    NTT

                                                          March 6, 2012

     General Network Element Constraint Encoding for GMPLS Controlled
                                 Networks

             draft-ietf-ccamp-general-constraint-encode-07.txt

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 6, 2012.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Bernstein and Lee     Expires September 6, 2012                [Page 1]
Internet-Draft  General Network Element Constraint Encoding  March 2012

   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
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   described in the Simplified BSD License.

Abstract

   Generalized Multiprotocol Label Switching can be used to control a
   wide variety of technologies. In some of these technologies network
   elements and links may impose additional routing constraints such as
   asymmetric switch connectivity, non-local label assignment, and label
   range limitations on links.

   This document provides efficient, protocol-agnostic encodings for
   general information elements representing connectivity and label
   constraints as well as label availability. It is intended that
   protocol-specific documents will reference this memo to describe how
   information is carried for specific uses.

Conventions used in this document

   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].

Table of Contents

   1. Introduction...................................................3
      1.1. Node Switching Asymmetry Constraints......................3
      1.2. Non-Local Label Assignment Constraints....................4
      1.3. Change Log................................................5
   2. Encoding.......................................................5
      2.1. Link Set Field............................................5
      2.2. Label Set Field...........................................7
         2.2.1. Inclusive/Exclusive Label Lists......................8
         2.2.2. Inclusive/Exclusive Label Ranges.....................9
         2.2.3. Bitmap Label Set.....................................9
      2.3. Available Labels Sub-TLV.................................10

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Internet-Draft  General Network Element Constraint Encoding  March 2012

      2.4. Shared Backup Labels Sub-TLV.............................11
      2.5. Connectivity Matrix Sub-TLV..............................11
      2.6. Port Label Restriction sub-TLV...........................13
         2.6.1. SIMPLE_LABEL........................................14
         2.6.2. CHANNEL_COUNT.......................................14
         2.6.3. LABEL_RANGE1........................................14
         2.6.4. SIMPLE_LABEL & CHANNEL_COUNT........................15
         2.6.5. Link Label Exclusivity..............................15
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