Extensions to the Path Computation Element Communication Protocol for Enhanced Errors and Notifications
draft-ietf-pce-enhanced-errors-07
PCE Working Group H. Pouyllau
Internet-Draft Alcatel-Lucent
Updates: 5440 (if approved) R. Theillaud
Intended status: Standards Track Marben Products
Expires: August 11, 2020 J. Meuric
Orange
H. Zheng (Editor)
X. Zhang
Huawei Technologies
February 8, 2020
Extensions to the Path Computation Element Communication Protocol for
Enhanced Errors and Notifications
draft-ietf-pce-enhanced-errors-07
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
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
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 August 11, 2020.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Pouyllau, et al. Expires August 11, 2020 [Page 1]
Internet-Draft Extensions to PCEP for Enhanced errors February 2020
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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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