Extensions to the Path Computation Element Communication Protocol for Enhanced Errors and Notifications
draft-ietf-pce-enhanced-errors-06

Document Type Active Internet-Draft (pce WG)
Last updated 2019-08-14
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 16, 2020                                     J. Meuric
                                                                  Orange
                                                       H. Zheng (Editor)
                                                                X. Zhang
                                                     Huawei Technologies
                                                         August 15, 2019

 Extensions to the Path Computation Element Communication Protocol for
                   Enhanced Errors and Notifications
                 draft-ietf-pce-enhanced-errors-06.txt

Abstract

   This document defines new error and notification TLVs for the PCE
   Communication Protocol (PCEP) specified in RFC5440, and will update
   it.  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.

   Internet-Drafts are working documents of the Internet Engineering
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on February 16, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Pouyllau, et al.        Expires February 16, 2020               [Page 1]
Internet-Draft   Extensions to PCEP for Enhanced errors      August 2019

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
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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 Guidelines . . . . . . . . . . . . . . . . .  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
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