Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-12

Document Type Active Internet-Draft (pce WG)
Last updated 2019-10-28
Replaces draft-ietf-pce-remote-initiated-gmpls-lsp, draft-zhang-pce-pcep-stateful-pce-gmpls
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PCE Working Group                                       Y. Lee (Editor) 
Internet-Draft                                                     SKKU 
Intended status: Standards Track                      H. Zheng (Editor)     
Expires: April 30, 2020.                                        Huawei 
                                                          O. G. de Dios 
                                                               V. Lopez 
                                                             Telefonica 
                                                              Zafar Ali 
                                                          Cisco Systems 
                                                       October 29, 2019 
                                      

                                    
   Path Computation Element (PCE) Protocol Extensions for Stateful PCE 
                   Usage in GMPLS-controlled Networks 
                                      
                 draft-ietf-pce-pcep-stateful-pce-gmpls-12 

Abstract 

   The Path Computation Element (PCE) facilitates Traffic Engineering 
   (TE) based path calculation in large, multi-domain, multi-region, or 
   multi-layer networks. The PCE communication Protocol (PCEP) has been 
   extended to support stateful PCE functions where the PCE retains 
   information about the paths already present in the network, but 
   those extensions are technology-agnostic. This memo provides 
   extensions required for PCEP so as to enable the usage of a stateful 
   PCE capability in GMPLS-controlled networks.  

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   
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Internet-Draft         Stateful PCEP for GMPLS            October 2019 
    

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   This Internet-Draft will expire on April 30, 2020. 

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Table of Contents 

    
   Table of Contents .............................................. 2 
   1. Introduction ................................................ 3 
   2. Conventions used in this document ........................... 4 
   3. General Context of Stateful PCE and PCEP for GMPLS .......... 4 
   4. Main Requirements ........................................... 5 
   5. Stateful PCEP Extensions for GMPLS Networks ................. 6 
      5.1. Capability Advertisement for Stateful PCEP in GMPLS .... 6 
      5.2. LSP Synchronization in GMPLS-controlled Networks........ 7 
      5.3. LSP Delegation and Cleanup  ............................ 8 
      5.4. LSP Operations in Stateful PCEP for GMPLS .............. 8 
         5.4.1. LSP Update in GMPLS-controlled Networks ........... 8 
         5.4.2. LSP Initiation in GMPLS-controlled Networks ....... 9 
   6. Modification of Existing PCEP Messages and Procedures ....... 9 
      6.1. Modification for LSP Re-optimization ................... 9 
      6.2. Modification for Route Exclusion ...................... 10 
         6.2.1. Modification for SRP Object ...................... 11 
   7. PCEP Object Extensions ..................................... 11 
      7.1. Generalized Endpoint .................................. 11 
      7.2. GENERALIZED-BANDWIDTH object .......................... 12 
      7.3. The LSP Protection Information ........................ 12 
 
 
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