Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-14

Document Type Active Internet-Draft (pce WG)
Authors Young Lee  , Haomian Zheng  , Oscar de Dios  , Victor Lopez  , Zafar Ali 
Last updated 2020-12-28
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                                                  Samsung 
Intended status: Standards Track                      H. Zheng (Editor)     
Expires: June 29, 2021                                           Huawei 
                                                          O. G. de Dios 
                                                               V. Lopez 
                                                             Telefonica 
                                                                 Z. Ali 
                                                          Cisco Systems 
                                                      December 29, 2020 
                                      

                                    
   Path Computation Element (PCE) Protocol Extensions for Stateful PCE 
                   Usage in GMPLS-controlled Networks 
                                      
                 draft-ietf-pce-pcep-stateful-pce-gmpls-14 

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. 

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Internet-Draft         Stateful PCEP for GMPLS           December 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. Overview of PCEP Extensions for GMPLS Networks .............. 6 
      5.1. Capability Advertisement for Stateful PCEP in GMPLS .... 6 
      5.2. LSP Synchronization .................................... 6 
      5.3. LSP Delegation and Cleanup ............................. 7 
      5.4. LSP Operations ......................................... 7 
   6. Extension of Existing PCEP Messages ......................... 7 
      6.1. The PCRpt Message ...................................... 7 
      6.2. The PCUpd Message ...................................... 8 
      6.3. The PCInitiate Message ................................. 9 
   7. PCEP Object Extensions ..................................... 10 
      7.1. Existing Extensions used for Stateful GMPLS ........... 10 
      7.2. New Extensions ........................................ 11 
         7.2.1. OPEN Object Extension GMPLS-CAPABILITY TLV ....... 11 
         7.2.2. XRO Subobject..................................... 12 
 
 
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