Requirements for Subscription to YANG Datastores
RFC 7923
| Document | Type | RFC - Informational (June 2016; No errata) | |
|---|---|---|---|
| Authors | Eric Voit , Alexander Clemm , Alberto Prieto | ||
| Last updated | 2016-06-30 | ||
| Replaces | draft-voit-i2rs-pub-sub-requirements | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Susan Hares | ||
| Shepherd write-up | Show (last changed 2016-01-04) | ||
| IESG | IESG state | RFC 7923 (Informational) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alia Atlas | ||
| Send notices to | shares@ndzh.com; | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | No IANA Actions | ||
Internet Engineering Task Force (IETF) E. Voit
Request for Comments: 7923 A. Clemm
Category: Informational A. Gonzalez Prieto
ISSN: 2070-1721 Cisco Systems
June 2016
Requirements for Subscription to YANG Datastores
Abstract
This document provides requirements for a service that allows client
applications to subscribe to updates of a YANG datastore. Based on
criteria negotiated as part of a subscription, updates will be pushed
to targeted recipients. Such a capability eliminates the need for
periodic polling of YANG datastores by applications and fills a
functional gap in existing YANG transports (i.e., Network
Configuration Protocol (NETCONF) and RESTCONF). Such a service can
be summarized as a "pub/sub" service for YANG datastore updates.
Beyond a set of basic requirements for the service, various
refinements are addressed. These refinements include: periodicity of
object updates, filtering out of objects underneath a requested a
subtree, and delivery QoS guarantees.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7923.
Voit, et al. Informational [Page 1]
RFC 7923 YANG Subscription Requirements June 2016
Copyright Notice
Copyright (c) 2016 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
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction ....................................................3
2. Business Drivers ................................................3
2.1. Pub/Sub in the Interface to the Routing System (I2RS) ......4
2.2. Pub/Sub Variants on Network Elements .......................5
2.3. Existing Generalized Pub/Sub Implementations ...............6
3. Terminology .....................................................6
4. Requirements ....................................................7
4.1. Assumptions for Subscriber Behavior ........................7
4.2. Subscription Service Requirements ..........................8
4.2.1. General .............................................8
4.2.2. Negotiation .........................................9
4.2.3. Update Distribution ................................10
4.2.4. Transport ..........................................11
4.2.5. Security Requirements ..............................11
4.2.6. Subscription QoS ...................................13
4.2.7. Filtering ..........................................14
4.2.8. Assurance and Monitoring ...........................15
5. Security Considerations ........................................15
6. References .....................................................16
6.1. Normative References ......................................16
6.2. Informative References ....................................16
Acknowledgments ...................................................17
Authors' Addresses ................................................18
Voit, et al. Informational [Page 2]
RFC 7923 YANG Subscription Requirements June 2016
1. Introduction
Applications interacting with YANG datastores require capabilities
beyond the traditional client-server configuration of network
elements. One class of such applications are service-assurance
applications, which must maintain a continuous view of operational
data and state. Another class of applications are security
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