Extension to the Path Computation Element Communication Protocol for Enhanced Errors and Notifications
draft-ietf-pce-enhanced-errors-00

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PCE Working Group                                            H. Pouyllau
Internet-Draft                                            Alcatel-Lucent
Intended status: Standards Track                            R. Theillaud
Expires: January 2, 2011                                 Marben Products
                                                               J. Meuric
                                                   France Telecom Orange
                                                               July 2010

  Extension to the Path Computation Element Communication Protocol for
                   Enhanced Errors and Notifications
                 draft-ietf-pce-enhanced-errors-00.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
   extends error and notification types in order to associate predefined
   PCEP behaviors.

Status of this Memo

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   This Internet-Draft will expire on January 2, 2011.

Copyright Notice

   Copyright (c) 2010 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
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect

Pouyllau, et al.         Expires January 2, 2011                [Page 1]
Internet-Draft    Extension to PCEP for Enhanced errors        July 2010

   to this document.  Code Components extracted from this document must
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Table of Contents

   1.      Terminology  . . . . . . . . . . . . . . . . . . . . . . .  3
   2.      Conventions used in this document  . . . . . . . . . . . .  4
   3.      Introduction . . . . . . . . . . . . . . . . . . . . . . .  5
   3.1.    Examples . . . . . . . . . . . . . . . . . . . . . . . . .  5
   3.1.1.  Error use-case . . . . . . . . . . . . . . . . . . . . . .  5
   3.1.2.  Notification use-case  . . . . . . . . . . . . . . . . . .  6
   3.2.    PCEP Description . . . . . . . . . . . . . . . . . . . . .  6
   3.3.    PCEP Behaviors . . . . . . . . . . . . . . . . . . . . . .  6
   3.3.1.  PCEP Behaviors in Case of Error  . . . . . . . . . . . . .  7
   3.3.2.  PCEP Behaviors in Case of Notification . . . . . . . . . .  7
   3.3.3.  PCE peer identification  . . . . . . . . . . . . . . . . .  8
   4.      Error and Notification Handling in PCEP  . . . . . . . . .  9
   4.1.    Propagation TLV  . . . . . . . . . . . . . . . . . . . . .  9
   4.2.    Error-criticity TLV  . . . . . . . . . . . . . . . . . . .  9
   4.3.    Notification type TLV  . . . . . . . . . . . . . . . . . .  9
   4.4.    Behaviors and TLV combinations . . . . . . . . . . . . . . 10
   5.      Propagation Restrictions . . . . . . . . . . . . . . . . . 12
   5.1.    Time-To-Live object  . . . . . . . . . . . . . . . . . . . 12
   5.2.    DIFFUSION-LIST Object (DLO)  . . . . . . . . . . . . . . . 12
   5.3.    Extension rules applied to existing errors and
           notifications  . . . . . . . . . . . . . . . . . . . . . . 14
   6.      Error and Notification Scenarios . . . . . . . . . . . . . 18
   6.1.    Local Error with a low level of criticity  . . . . . . . . 18
   6.2.    Propagated Error with a low level of criticity . . . . . . 18
   6.3.    Local Error with a medium level of criticity . . . . . . . 19
   6.4.    Propagated Error with a medium level of criticity  . . . . 20
   6.5.    Local request-specific notification  . . . . . . . . . . . 20
   6.6.    Local non request-specific notification  . . . . . . . . . 21
   6.7.    Propagated request-specific notification . . . . . . . . . 21
   6.8.    Propagated non request-specific notification . . . . . . . 22
   7.      Security Considerations  . . . . . . . . . . . . . . . . . 23
   8.      IANA Considerations  . . . . . . . . . . . . . . . . . . . 24
   8.1.    PCEP TLV Type Indicators . . . . . . . . . . . . . . . . . 24
   8.2.    New TTL object . . . . . . . . . . . . . . . . . . . . . . 24
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