General Network Element Constraint Encoding for GMPLS Controlled Networks
draft-ietf-ccamp-general-constraint-encode-12

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Document Type Active Internet-Draft (ccamp WG)
Last updated 2013-11-13
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Network Working Group                                      G. Bernstein
Internet Draft                                        Grotto Networking
Intended status: Standards Track                                 Y. Lee
Expires: May 2014                                                 D. Li
                                                                 Huawei
                                                             W. Imajuku
                                                                    NTT

                                                      November 13, 2013

     General Network Element Constraint Encoding for GMPLS Controlled
                                 Networks

             draft-ietf-ccamp-general-constraint-encode-12.txt

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on May 13, 2012.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   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
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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......................4
      1.2. Non-Local Label Assignment Constraints....................4
   2. Encoding.......................................................5
      2.1. Connectivity Matrix Field.................................5
      2.2. Port Label Restriction Field..............................7
         2.2.1. SIMPLE_LABEL.........................................8
         2.2.2. CHANNEL_COUNT........................................8
         2.2.3. LABEL_RANGE1.........................................9
         2.2.4. SIMPLE_LABEL & CHANNEL_COUNT.........................9

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         2.2.5. Link Label Exclusivity..............................10
      2.3. Link Set Field...........................................10
      2.4. Available Labels Field...................................12
      2.5. Shared Backup Labels Field...............................13
      2.6. Label Set Field..........................................14
         2.6.1. Inclusive/Exclusive Label Lists.....................15
         2.6.2. Inclusive/Exclusive Label Ranges....................15
         2.6.3. Bitmap Label Set....................................16
   3. Security Considerations.......................................17
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