Extensions to the Path Computation Element Communication Protocol for Enhanced Errors and Notifications
draft-ietf-pce-enhanced-errors-05
PCE Working Group H. Pouyllau
Internet-Draft Alcatel-Lucent
Updates: 5440 (if approved) R. Theillaud
Intended status: Standards Track Marben Products
Expires: August 19, 2019 J. Meuric
France Telecom Orange
H. Zheng (Editor)
X. Zhang
Huawei Technologies
February 15, 2019
Extensions to the Path Computation Element Communication Protocol for
Enhanced Errors and Notifications
draft-ietf-pce-enhanced-errors-05.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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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 19, 2019.
Copyright Notice
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This document is subject to BCP 78 and the IETF Trust's Legal
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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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