General Network Element Constraint Encoding for GMPLS Controlled Networks
draft-ietf-ccamp-general-constraint-encode-06

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Last updated 2011-12-13 (latest revision 2011-05-25)
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Network Working Group                                      G. Bernstein  
Internet Draft                                        Grotto Networking 
Intended status: Standards Track                                 Y. Lee  
Expires: June 2012                                                D. Li 
                                                                 Huawei 
                                                             W. Imajuku 
                                                                    NTT 
                                    
                                    
                                                      December 13, 2011 
                                      
     General Network Element Constraint Encoding for GMPLS Controlled 
                                 Networks 

             draft-ietf-ccamp-general-constraint-encode-06.txt 

Status of this Memo 

   This Internet-Draft is submitted to IETF in full conformance with the 
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   This Internet-Draft will expire on June 13, 2012. 

Copyright Notice 

   Copyright (c) 2011 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 
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   (http://trustee.ietf.org/license-info) in effect on the date of 
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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......................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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      2.4. Shared Backup Labels Sub-TLV.............................11
      2.5. Connectivity Matrix Sub-TLV..............................11
      2.6. Port Label Restriction sub-TLV...........................12
         2.6.1. SIMPLE_LABEL........................................13
         2.6.2. CHANNEL_COUNT.......................................14
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