PCEP Extensions for MPLS-TE LSP Automatic Bandwidth Adjustment with Stateful PCE
draft-ietf-pce-stateful-pce-auto-bandwidth-06

Document Type Active Internet-Draft (pce WG)
Last updated 2017-10-21
Replaces draft-dhody-pce-stateful-pce-auto-bandwidth
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PCE Working Group                                               D. Dhody
Internet-Draft                                                  U. Palle
Intended status: Standards Track                     Huawei Technologies
Expires: April 24, 2018                                         R. Singh
                                                        Juniper Networks
                                                               R. Gandhi
                                                     Cisco Systems, Inc.
                                                                 L. Fang
                                                           Expedia, Inc.
                                                        October 21, 2017

  PCEP Extensions for MPLS-TE LSP Automatic Bandwidth Adjustment with
                              Stateful PCE
              draft-ietf-pce-stateful-pce-auto-bandwidth-06

Abstract

   The Path Computation Element Communication Protocol (PCEP) provides
   mechanisms for Path Computation Elements (PCEs) to perform path
   computations in response to Path Computation Clients (PCCs) requests.
    The Stateful PCE extensions allow stateful control of Multi-Protocol
   Label Switching (MPLS) Traffic Engineering Label Switched Paths (TE
   LSPs) using PCEP.

   Automatic bandwidth allows automatic and dynamic adjustment of the TE
   LSP bandwidth reservation based on the volume of traffic flowing
   through the LSP.  This document describes PCEP extensions for
   automatic bandwidth adjustment when employing an Active Stateful PCE
   for both PCE-Initiated and PCC-Initiated LSPs.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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Dhody, et al.            Expires April 24, 2018                 [Page 1]
Internet-Draft      Auto-Bandwidth with Stateful PCE    October 21, 2017

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  4
     2.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  4
     2.2.  Abbreviations  . . . . . . . . . . . . . . . . . . . . . .  4
     2.3.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  Requirements for PCEP Extensions . . . . . . . . . . . . . . .  7
   4.  Architectural Overview . . . . . . . . . . . . . . . . . . . .  8
     4.1.  Auto-Bandwidth Overview  . . . . . . . . . . . . . . . . .  8
     4.2.  Auto-bandwidth Theory of Operation . . . . . . . . . . . .  8
     4.3.  Scaling Considerations . . . . . . . . . . . . . . . . . . 10
   5.  Extensions to the PCEP . . . . . . . . . . . . . . . . . . . . 10
     5.1.  Capability Advertisement . . . . . . . . . . . . . . . . . 10
       5.1.1.  AUTO-BANDWIDTH-CAPABILITY TLV  . . . . . . . . . . . . 11
     5.2.  AUTO-BANDWIDTH-ATTRIBUTES TLV  . . . . . . . . . . . . . . 11
       5.2.1.  Sample-Interval sub-TLV  . . . . . . . . . . . . . . . 13
       5.2.2.  Adjustment Intervals . . . . . . . . . . . . . . . . . 13
         5.2.2.1.  Adjustment-Interval sub-TLV  . . . . . . . . . . . 13
         5.2.2.2.  Down-Adjustment-Interval sub-TLV . . . . . . . . . 14
       5.2.3.  Adjustment Thresholds  . . . . . . . . . . . . . . . . 14
         5.2.3.1.  Adjustment-Threshold sub-TLV . . . . . . . . . . . 15
         5.2.3.2.  Adjustment-Threshold-Percentage sub-TLV  . . . . . 15
         5.2.3.3.  Down-Adjustment-Threshold sub-TLV  . . . . . . . . 16
         5.2.3.4.  Down-Adjustment-Threshold-Percentage sub-TLV . . . 17
       5.2.4.  Minimum and Maximum Bandwidth Values . . . . . . . . . 18
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