A Data Model for Network Topologies
draft-ietf-i2rs-yang-network-topo-15
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2017-09-05
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draft-clemm-i2rs-yang-network-topo
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Network Working Group A. Clemm
Internet-Draft Huawei
Intended status: Standards Track J. Medved
Expires: March 9, 2018 Cisco
R. Varga
Pantheon Technologies SRO
N. Bahadur
Bracket Computing
H. Ananthakrishnan
Packet Design
X. Liu
Jabil
September 5, 2017
A Data Model for Network Topologies
draft-ietf-i2rs-yang-network-topo-15.txt
Abstract
This document defines an abstract (generic) YANG data model for
network/service topologies and inventories. The data model serves as
a base model which is augmented with technology-specific details in
other, more specific topology and inventory data models.
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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
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 March 9, 2018.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
Clemm, et al. Expires March 9, 2018 [Page 1]
Internet-Draft draft-ietf-i2rs-yang-network-topo-15.txt September 2017
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Key Words . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Definitions and Acronyms . . . . . . . . . . . . . . . . . . 7
4. Model Structure Details . . . . . . . . . . . . . . . . . . . 8
4.1. Base Network Model . . . . . . . . . . . . . . . . . . . 8
4.2. Base Network Topology Data Model . . . . . . . . . . . . 10
4.3. Extending the data model . . . . . . . . . . . . . . . . 12
4.4. Discussion and selected design decisions . . . . . . . . 12
4.4.1. Container structure . . . . . . . . . . . . . . . . . 12
4.4.2. Underlay hierarchies and mappings . . . . . . . . . . 13
4.4.3. Dealing with changes in underlay networks . . . . . . 13
4.4.4. Use of groupings . . . . . . . . . . . . . . . . . . 14
4.4.5. Cardinality and directionality of links . . . . . . . 14
4.4.6. Multihoming and link aggregation . . . . . . . . . . 15
4.4.7. Mapping redundancy . . . . . . . . . . . . . . . . . 15
4.4.8. Typing . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.9. Representing the same device in multiple networks . . 15
4.4.10. Supporting client-configured and system-controlled
network topology . . . . . . . . . . . . . . . . . . 16
4.4.11. Identifiers of string or URI type . . . . . . . . . . 17
5. Interactions with Other YANG Modules . . . . . . . . . . . . 18
6. YANG Modules . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1. Defining the Abstract Network: ietf-network.yang . . . . 18
6.2. Creating Abstract Network Topology: ietf-network-
topology.yang . . . . . . . . . . . . . . . . . . . . . . 23
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 29
8. Security Considerations . . . . . . . . . . . . . . . . . . . 30
9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 31
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 31
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