PCEP Extension for Flow Specification
draft-ietf-pce-pcep-flowspec-02

Document Type Active Internet-Draft (pce WG)
Last updated 2018-10-16
Replaces draft-li-pce-pcep-flowspec
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Network Working Group                                      D. Dhody, Ed.
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                          A. Farrel, Ed.
Expires: April 19, 2019                                 Juniper Networks
                                                                   Z. Li
                                                     Huawei Technologies
                                                        October 16, 2018

                 PCEP Extension for Flow Specification
                    draft-ietf-pce-pcep-flowspec-02

Abstract

   The Path Computation Element (PCE) is a functional component capable
   of selecting the paths through a traffic engineered network.  These
   paths may be supplied in response to requests for computation, or may
   be unsolicited instructions issued by the PCE to network elements.
   Both approaches use the PCE Communication Protocol (PCEP) to convey
   the details of the computed path.

   Traffic flows may be categorized and described using "Flow
   Specifications".  RFC 5575 defines the Flow Specification and
   describes how it may be distributed in BGP to allow specific traffic
   flows to be associated with routes.

   This document specifies a set of extensions to PCEP to support
   dissemination of Flow Specifications.  This allows a PCE to indicate
   what traffic should be placed on each path that it is aware of.

Status of This Memo

   This Internet-Draft is submitted 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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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 19, 2019.

Dhody, et al.            Expires April 19, 2019                 [Page 1]
Internet-Draft                PCEP-FlowSpec                 October 2018

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Procedures for PCE Use of Flow Specifications . . . . . . . .   4
     3.1.  Capability Advertisement  . . . . . . . . . . . . . . . .   5
       3.1.1.  PCEP OPEN Message . . . . . . . . . . . . . . . . . .   5
       3.1.2.  IGP PCE Capabilities Advertisement  . . . . . . . . .   5
     3.2.  Dissemination Procedures  . . . . . . . . . . . . . . . .   6
     3.3.  Flow Specification Synchronization  . . . . . . . . . . .   7
   4.  PCE FlowSpec Capability TLV . . . . . . . . . . . . . . . . .   7
   5.  PCEP FLOWSPEC Object  . . . . . . . . . . . . . . . . . . . .   8
   6.  Flow Filter TLV . . . . . . . . . . . . . . . . . . . . . . .  10
   7.  Flow Specification TLVs . . . . . . . . . . . . . . . . . . .  10
   8.  Detailed Procedures . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  Default Behavior and Backward Compatibility . . . . . . .  13
     8.2.  Composite Flow Specifications . . . . . . . . . . . . . .  13
     8.3.  Modifying Flow Specifications . . . . . . . . . . . . . .  14
     8.4.  Multiple Flow Specifications  . . . . . . . . . . . . . .  14
     8.5.  Adding and Removing Flow Specifications . . . . . . . . .  14
     8.6.  VPN Identifiers . . . . . . . . . . . . . . . . . . . . .  15
     8.7.  Priorities and Overlapping Flow Specifications  . . . . .  15
   9.  PCEP Messages . . . . . . . . . . . . . . . . . . . . . . . .  15
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
     10.1.  PCEP Objects . . . . . . . . . . . . . . . . . . . . . .  18
       10.1.1.  PCEP FLOWSPEC Object Flag Field  . . . . . . . . . .  18
     10.2.  PCEP TLV Type Indicators . . . . . . . . . . . . . . . .  19
     10.3.  Flow Specification TLV Type Indicators . . . . . . . . .  19
     10.4.  PCEP Error Codes . . . . . . . . . . . . . . . . . . . .  20
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