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Applicability of Generalized Multiprotocol Label Switching (GMPLS) User-Network Interface (UNI)
draft-zhang-ccamp-gmpls-uni-app-05

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Last updated: 2014-02-13
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CCAMP Working Group                                          Fatai Zhang 
Internet Draft                                                    Huawei 
Category: Informational                              O. Gonzalez de Dios 
                                   Telefonica Investigacion y Desarrollo        
                                                               A. Farrel 
                                                      Old Dog Consulting 
                                                              Xian Zhang  
                                                                  Huawei 
                                                           D. Ceccarelli 
                                                                Ericsson 
Expires: August 13, 2014                               February 14, 2014 
                                    
                                    
                                    
   Applicability of Generalized Multiprotocol Label Switching (GMPLS) 
                      User-Network Interface (UNI) 
                                    
                  draft-zhang-ccamp-gmpls-uni-app-05.txt 

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   Copyright (c) 2014 IETF Trust and the persons identified as the    
   document authors.  All rights reserved. 

 
 
 
Zhang et al              Expires August 2014                  [Page 1] 


draft-zhang-ccamp-gmpls-uni-app-05.txt                    February 2014 

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Abstract 

   Generalized Multiprotocol Label Switching (GMPLS) defines a set of 
   protocols for the creation of Label Switched Paths (LSPs) in various 
   switching technologies. The GMPLS User-Network Interface (UNI) was 
   developed in RFC4208 in order to be applied to an overlay network 
   architectural model.  

   This document examines a number of GMPLS UNI application scenarios. 
   It shows how techniques developed after the GMPLS UNI can be applied 
   to automate or enable critical processes for these applications. This 
   document also suggests simple extensions that could be made to 
   existing technologies to further enable the UNI and points out some 
   unresolved issues.   

Table of Contents 

   1. Introduction ................................................ 3 
   2. UNI Addressing .............................................. 5 
   3. UNI Auto Discovery .......................................... 7 
   4. UNI Path Computation......................................... 8 
      4.1. UNI Link Selection...................................... 8 
   5. Additional Parameters across UNI............................ 11 
      5.1. Constrained Path Computation........................... 11 
      5.2. Collection Requests over UNI........................... 11 
   6. UNI Path Provisioning Models................................ 12 
      6.1. Flat Model ............................................ 12 
      6.2. Stitching Model........................................ 13 
      6.3. Session Shuffling Model................................ 13 
      6.4. Hierarchal Model....................................... 14 
   7. UNI Recovery ............................................... 15 
      7.1. End-to-end Recovery.................................... 15 
         7.1.1. Serial Provisioning of Working and Protection Paths15 
         7.1.2. Concurrent Computation of Working and Protection Path16 
      7.2. Segment Recovery....................................... 17 

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