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Extensions to the Path Computation Element communication Protocol (PCEP) for Inter-Layer MPLS and GMPLS Traffic Engineering
draft-ietf-pce-inter-layer-ext-08

Document type: Active Internet-Draft (pce WG)
Document stream: IETF
Last updated: 2014-01-23
Intended RFC status: Unknown
Other versions: plain text, pdf, html

IETF State: WG Document
Document shepherd: No shepherd assigned

IESG State: I-D Exists
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Network Working Group                                             E. Oki 
Internet-Draft                                                 UEC Tokyo 
Intended status: Standards Track                         Tomonori Takeda 
                                                                     NTT 
                                                             J-L Le Roux 
                                                          France Telecom 
                                                               A. Farrel 
                                                        Juniper Networks 
                                                             Fatai Zhang 
                                                                  Huawei 
Expires: July 24, 2014                                  January 24, 2014 
                                      

                                      
     Extensions to the Path Computation Element communication Protocol  
         (PCEP) for Inter-Layer MPLS and GMPLS Traffic Engineering 
                                      
                   draft-ietf-pce-inter-layer-ext-08.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   
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   This Internet-Draft will expire on July 24, 2014. 

    

Abstract 

 
 
 
<E. Oki>                  Expires July 2013                  [Page 1] 


draft-ietf-pce-inter-layer-ext-08.txt                     January 2014 
    

   The Path Computation Element (PCE) provides path computation 
   functions in support of traffic engineering in Multiprotocol Label 
   Switching (MPLS) and Generalized MPLS (GMPLS) networks. 

   MPLS and GMPLS networks may be constructed from layered service 
   networks. It is advantageous for overall network efficiency to 
   provide end-to-end traffic engineering across multiple network layers 
   through a process called inter-layer traffic engineering. PCE is a 
   candidate solution for such requirements. 

   The PCE communication Protocol (PCEP) is designed as a communication 
   protocol between Path Computation Clients (PCCs) and PCEs. This 
   document presents PCEP extensions for inter-layer traffic engineering. 

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 
   2. Overview of PCE-Based Inter-Layer Path Computation ........... 3 
   3. Protocol Extensions .......................................... 4 
      3.1. INTER-LAYER Object....................................... 4 
      3.2. SWITCH-LAYER Object ..................................... 7 
      3.3. REQ-ADAP-CAP Object ..................................... 8 
      3.4. New Metric Types......................................... 9 
      3.5. ERO sub-object ......................................... 10 
   4. Procedures .................................................. 10 
      4.1. Path Computation Request ............................... 10 
      4.2. Path Computation Reply ................................. 11 
   5. Updated Format of PCEP Messages ............................. 12 
   6. Manageability Considerations ................................ 13 
   7. IANA Considerations ......................................... 13 
      7.1. New PCEP Objects........................................ 13 
      7.2. New Registry for INTER-LAYER Object Flags .............. 14 
      7.3. METRIC Type ............................................ 15 
   8. Security Considerations ..................................... 15 
   9. Acknowledgments ............................................. 15 
   10. References ................................................. 15 
      10.1. Normative References .................................. 15 
      10.2. Informative References ................................ 16 

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