Extensions to the Path Computation Element Communication Protocol for Enhanced Errors and Notifications
draft-ietf-pce-enhanced-errors-04

Document Type Active Internet-Draft (individual)
Last updated 2018-08-17
Replaces draft-pouyllau-pce-enhanced-errors
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PCE Working Group                                            H. Pouyllau
Internet-Draft                                            Alcatel-Lucent
Updates: 5440 (if approved)                                 R. Theillaud
Intended status: Standards Track                         Marben Products
Expires: February 18, 2019                                     J. Meuric
                                                   France Telecom Orange
                                                       H. Zheng (Editor)
                                                                X. Zhang
                                                     Huawei Technologies
                                                         August 17, 2018

 Extensions to the Path Computation Element Communication Protocol for
                   Enhanced Errors and Notifications
                 draft-ietf-pce-enhanced-errors-04.txt

Abstract

   This document defines new error and notification TLVs for the PCE
   Communication Protocol (PCEP) [RFC5440].  It identifies the possible
   PCEP behaviors in case of error or notification.  Thus, this draft
   defines types of errors and how they are disclosed to other PCEs in
   order to support predefined PCEP behaviors.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on February 18, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents

Pouyllau, et al.        Expires February 18, 2019               [Page 1]
Internet-Draft   Extensions to PCEP for Enhanced errors      August 2018

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Table of Contents

   1.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
   3.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.1.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.1.1.  Error use-case  . . . . . . . . . . . . . . . . . . . . .   4
   3.1.2.  Notification use-case . . . . . . . . . . . . . . . . . .   4
   4.  PCEP Behaviors  . . . . . . . . . . . . . . . . . . . . . . .   4
   4.1.  PCEP Behaviors in Case of Error . . . . . . . . . . . . . .   5
   4.2.  PCEP Behaviors in Case of Notification  . . . . . . . . . .   6
   4.3.  PCE Peer Identification . . . . . . . . . . . . . . . . . .   6
   5.  PCEP Extensions for Error and Notification Handling . . . . .   7
   5.1.  Propagation TLV . . . . . . . . . . . . . . . . . . . . . .   7
   5.2.  Error-criticality TLV . . . . . . . . . . . . . . . . . . .   7
   5.3.  Behaviors and TLV combinations  . . . . . . . . . . . . . .   8
   5.4.  Propagation Restrictions TLVs . . . . . . . . . . . . . . .   9
   5.4.1.  Time-To-Live (TTL) TLV  . . . . . . . . . . . . . . . . .   9
   5.4.2.  DIFFUSION-LIST TLV  . . . . . . . . . . . . . . . . . . .   9
   5.4.3.  Rules Applied to Existing Errors and Notifications  . . .  11
   6.  Future Extension Consideration  . . . . . . . . . . . . . . .  15
   7.  Backward Compatibility Consideration  . . . . . . . . . . . .  15
   8.  Error and Notification Scenarios  . . . . . . . . . . . . . .  15
   8.1.  Error Behavior Type 1 . . . . . . . . . . . . . . . . . . .  15
   8.2.  Error Behavior Type 2 . . . . . . . . . . . . . . . . . . .  16
   8.3.  Error Behavior Type 4 . . . . . . . . . . . . . . . . . . .  17
   8.4.  Error Behavior Type 5 . . . . . . . . . . . . . . . . . . .  17
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
   10.1.  PCEP TLV Type Indicators . . . . . . . . . . . . . . . . .  18
   10.2.  New DIFFUSION-LIST TLV . . . . . . . . . . . . . . . . . .  19
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