PCEP Extensions for MPLS-TE LSP Automatic Bandwidth Adjustment with Stateful PCE
draft-dhody-pce-stateful-pce-auto-bandwidth-05

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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: December 18, 2015                                      R. Singh
                                                        Juniper Networks
                                                               R. Gandhi
                                                     Cisco Systems, Inc.
                                                           June 16, 2015

  PCEP Extensions for MPLS-TE LSP Automatic Bandwidth Adjustment with
                              Stateful PCE
             draft-dhody-pce-stateful-pce-auto-bandwidth-05

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 provide stateful control of Multi-
   Protocol Label Switching (MPLS) Traffic Engineering Label Switched
   Paths (TE LSPs) via PCEP, for the case where PCC delegates control
   over one or more locally configured LSPs to the PCE.

   This document describes automatic bandwidth adjustment of such LSPs
   when employing an Active Stateful PCE.  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 traffic to
   a PCE and the PCE computes the adjustment bandwidth.

   This document also describes automatic bandwidth adjustment for
   stateful PCE-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 December 18, 2015               [Page 1]
Internet-Draft          AUTO-BW for Stateful PCE               June 2015

   This Internet-Draft will expire on December 18, 2015.

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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  . . . . . . . . . . . . . .   5
   4.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   7
     4.1.  Auto-Bandwidth Overview . . . . . . . . . . . . . . . . .   7
     4.2.  Theory of Operation . . . . . . . . . . . . . . . . . . .   9
     4.3.  Scaling Considerations  . . . . . . . . . . . . . . . . .  10
   5.  Extensions to the PCEP  . . . . . . . . . . . . . . . . . . .  10
     5.1.  AUTO-BANDWIDTH-ATTRIBUTE TLV  . . . . . . . . . . . . . .  10
       5.1.1.  Adjustment Parameters . . . . . . . . . . . . . . . .  12
         5.1.1.1.  Sample-Interval sub-TLV . . . . . . . . . . . . .  12
         5.1.1.2.  Adjustment-Interval sub-TLV . . . . . . . . . . .  13
         5.1.1.3.  Adjustment Threshold  . . . . . . . . . . . . . .  13
         5.1.1.4.  Minimum and Maximum Bandwidth . . . . . . . . . .  14
         5.1.1.5.  Overflow and Underflow Condition  . . . . . . . .  15
       5.1.2.  Real-time Traffic Reporting . . . . . . . . . . . . .  18
         5.1.2.1.  Real-time-Traffic-Report-Interval sub-TLV . . . .  19
         5.1.2.2.  Real-time-Traffic-Report-Threshold sub-TLV  . . .  19
         5.1.2.3.  Real-time-Traffic-Report-Threshold-Percentage
                   sub-TLV . . . . . . . . . . . . . . . . . . . . .  20
         5.1.2.4.  Real-time-Traffic-Report-Flow-Threshold sub-TLV .  20
         5.1.2.5.  Real-time-Traffic-Report-Flow-Threshold-
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