PCEP Extensions for MPLS-TE LSP Automatic Bandwidth Adjustment with Stateful PCE
draft-dhody-pce-stateful-pce-auto-bandwidth-07

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Replaced by RFC 8733, RFC 8733
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PCE Working Group                                               D. Dhody
Internet-Draft                                                  U. Palle
Intended status: Standards Track                     Huawei Technologies
Expires: August 30, 2016                                        R. Singh
                                                        Juniper Networks
                                                               R. Gandhi
                                                     Cisco Systems, Inc.
                                                                 L. Fang
                                                               Microsoft
                                                       February 29, 2016

  PCEP Extensions for MPLS-TE LSP Automatic Bandwidth Adjustment with
                              Stateful PCE
             draft-dhody-pce-stateful-pce-auto-bandwidth-07

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.

   This document describes PCEP extensions for automatic bandwidth
   adjustment when employing an Active Stateful PCE for both PCE-
   initiated and PCC-initiated LSPs.  In one of the models described,
   PCC computes the bandwidth to be adjusted and informs the PCE whereas
   in the second model, PCC reports the real-time bandwidth usage to a
   PCE and the PCE computes the adjustment bandwidth. 

Status of This Memo

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Dhody, et al.           Expires August 30, 2016                 [Page 1]
Internet-Draft          AUTO-BW for Stateful PCE       February 27, 2016

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  5
     2.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  5
     2.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  Requirements for PCEP Extensions . . . . . . . . . . . . . . .  6
   4.  Architectural Overview . . . . . . . . . . . . . . . . . . . .  7
     4.1.  Auto-Bandwidth Overview  . . . . . . . . . . . . . . . . .  7
     4.2.  Theory of Operation  . . . . . . . . . . . . . . . . . . . 10
     4.3.  Scaling Considerations . . . . . . . . . . . . . . . . . . 11
   5.  Extensions to the PCEP . . . . . . . . . . . . . . . . . . . . 11
     5.1.  Capability Advertisement . . . . . . . . . . . . . . . . . 11
       5.1.1 AUTO-BANDWIDTH-CAPABILITY TLV  . . . . . . . . . . . . . 12
     5.2.  AUTO-BANDWIDTH-ATTRIBUTE TLV . . . . . . . . . . . . . . . 12
       5.2.1.  Sample-Interval sub-TLV  . . . . . . . . . . . . . . . 14
       5.2.2.  Adjustment-Interval sub-TLV  . . . . . . . . . . . . . 14
       5.2.3.  Adjustment Threshold . . . . . . . . . . . . . . . . . 15
         5.2.3.1.  Adjustment-Threshold sub-TLV . . . . . . . . . . . 15
         5.2.3.2.  Adjustment-Threshold-Percentage sub-TLV  . . . . . 15
       5.2.4.  Minimum and Maximum Bandwidth Values . . . . . . . . . 16
         5.2.4.1.  Minimum-Bandwidth sub-TLV  . . . . . . . . . . . . 16
         5.2.4.2.  Maximum-Bandwidth sub-TLV  . . . . . . . . . . . . 16
       5.2.5.  Overflow and Underflow Condition . . . . . . . . . . . 17
         5.2.5.1.  Overflow-Threshold sub-TLV . . . . . . . . . . . . 17
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