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Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-zhang-pce-pcep-stateful-pce-gmpls-03

Document type: Active Internet-Draft (individual)
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Last updated: 2013-10-21
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Network Working Group                                        Xian Zhang 
Internet-Draft                                                Young Lee 
Intended status: Standards Track                            Fatai Zhang 
                                                                 Huawei 
                                                         Ramon Casellas 
                                                                   CTTC 
                                                 Oscar Gonzalez de Dios 
                                                         Telefonica I+D 
                                                              Zafar Ali 
                                                          Cisco Systems 
                                                    
                                                                  
Expires: April 21, 2014                                October 21, 2013 
                                      

                                    
   Path Computation Element (PCE) Protocol Extensions for Stateful PCE 
                   Usage in GMPLS-controlled Networks 
                                      
              draft-zhang-pce-pcep-stateful-pce-gmpls-03.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   
   Task Force (IETF), its areas, and its working groups.  Note that   
   other groups may also distribute working documents as Internet-   
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   The list of Internet-Draft Shadow Directories can be accessed at   
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   This Internet-Draft will expire on April 21, 2014. 

 
 
 
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draft-zhang-pce-pcep-stateful-pce-gmpls-03.txt             October 2013 
    

    

Abstract 

   The Path Computation Element (PCE) facilitates Traffic Engineering 
   (TE) based path calculation in large, multi-domain, multi-region, or 
   multi-layer networks. [Stateful-PCE] provides the fundamental PCE 
   communication Protocol (PCEP) extensions needed to support stateful 
   PCE functions, without specifying the technology-specific extensions. 
   This memo provides extensions required for PCEP so as to enable the 
   usage of a stateful PCE capability in GMPLS-controlled networks.  

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 

    
   Table of Contents .............................................. 2 
   1. Introduction ................................................ 3 
   2. PCEP Extensions ............................................. 3 
      2.1. Overview of Requirements................................ 3 
      2.2. Stateful PCE Capability Advertisement ................... 4 
         2.2.1. PCE Capability Advertisement in Multi-layer Networks 4 
      2.3. LSP Delegation in GMPLS-controlled Networks ............. 5 
      2.4. LSP Synchronization in GMPLS-controlled networks......... 6 
      2.5. Modification of Existing PCEP Messages and Procedures.... 7 
         2.5.1. Use cases .........................................  8 
         2.5.2. Modification for LSP Re-optimization ............... 8 
         2.5.3. Modification for Route Exclusion ................... 9 
      2.6. Additional Error Type and Error Values Defined.......... 10 
   3. IANA Considerations ........................................  10 
   4. Manageability Considerations ................................ 10 
      4.1. Requirements on Other Protocols and Functional Components10 
   5. Security Considerations..................................... 11 
   6. Acknowledgement ............................................ 11 
   7. References ................................................. 11 
      7.1. Normative References................................... 11 
      7.2. Informative References................................. 11 
   8. Contributors' Address....................................... 12 
   Authors' Addresses ............................................ 13 
    
    

 
 
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