[NGO] A proposed WG Charter for NETMOD: NETCONF Data Modeling
David Partain <david.partain@ericsson.com> Mon, 31 March 2008 19:31 UTC
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From: David Partain <david.partain@ericsson.com>
Organization: Ericsson AB
To: 'NETCONF Goes On' <ngo@ietf.org>
Date: Mon, 31 Mar 2008 21:30:34 +0200
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Subject: [NGO] A proposed WG Charter for NETMOD: NETCONF Data Modeling
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Greetings, Since the last IETF, a group of people has been working on creating a charter proposal for work in new working group as a result of the many discussions, BoFs, semi-BoFs, bar BoFs... on a modeling language for NETCONF. We did this at the request of our O&M ADs. The group included Alex Clemm, Balázs Lengyel, Bernd Linowski, Bert Wijnen, David Harrington, David Partain, Jung Tjong, Ladislav Lhotka, Martin Björklund, Martin Storch, Mehmet Ersue, Phil Shafer, Randy Presuhn, Rohan Mahy, and Sharon Chisholm. We've worked very hard on this (LOTS of email), and, while we don't all agree on every word, I believe we're all in agreement on the general direction forward. Our proposal is below and we look forward to your comments here on NGO. With kind regards, David Partain --------------------------------------------------------------- NETMOD: NETCONF Data Modeling Chairs: TBD The NETCONF Working Group has completed a base protocol to be used for configuration management. However, the NETCONF protocol does not include a standard content layer. The specifications do not include a modeling language or accompanying rules that can be used to model the management information that is to be configured using NETCONF. This has resulted in inconsistent syntax and interoperability problems. The purpose of NETMOD is to support the ongoing development of IETF and vendor-defined data models for NETCONF. NETMOD's requirements are drawn from the RCDML requirements draft (draft-presuhn-rcdml) and documents referenced therein. The WG will define a "human-friendly" modeling language defining the semantics of operational data, configuration data, notifications, and operations. This language will focus on readability and ease of use. This language must be able to serve as the normative description of NETCONF data models. The WG will use YANG (draft-bjorklund-yang) as its starting point for this language. Language abstractions that facilitate model extensibility and reuse have been identified as a work area and will be considered as a work item or may be integrated into the YANG document based on WG consensus. The WG will define a canonical mapping of this language to NETCONF XML instance documents, the on-the-wire format of YANG-defined XML content. Only data models defined in YANG will have to adhere to this on-the-wire format. In order to leverage existing XML tools for validating NETCONF data in various contexts and also facilitate exchange of data models and schemas with other IETF working groups, the WG will define standard mappings from YANG to the DSDL data modeling framework (ISO/IEC 19757) with additional annotations to preserve semantics. The initial YANG mapping specifications are expressly defined for NETCONF modeling. However, there may be future areas of applicability beyond NETCONF, and the WG must provide suitable language extensibility mechanisms to allow for such future work. The NETMOD WG will only address modeling NETCONF devices and the language extensibility mechanisms. Any application of YANG to other protocols is future work. The WG will consult with the NETCONF WG to ensure that NETMOD's decision do not conflict with planned work in NETCONF (e.g., locking, notifications). While it is desirable to provide a migration path from existing MIBs to YANG data models, it is not a requirement to provide full compatibility between SMIv2 and YANG. YANG is permitted to introduce constructs that cannot be expressed in SMIv2. However, everything that can be expressed in SMIv2 must be expressible in YANG. Initial deliverables are below. The working group may choose to combine multiple deliverables into a single document where deemed appropriate. 1. An architecture document explaining the relationship between YANG and its inputs and outputs. (informational) 2. The YANG data modeling language and semantics (proposed standard) 3. Mapping of YANG to XML instance data in NETCONF (proposed standard) 4. A semantically equivalent two-way mapping to an XML-based syntax for YANG (currently called YIN) (proposed standard) 5. Mapping of YANG to DSDL data modeling framework (ISO/IEC 19757) (proposed standard) 6. Definition of annotations for DSDL to preserve top-level semantics during translation (proposed standard) 7. A standard type library for use by YANG (proposed standard) Goals and Milestones: Jun 2008 - All _individual_ drafts available that will be used as input into the WG documents (draft-bjorklund-yang, architecture draft, YIN draft, YANG standard library draft, DSDL mapping draft?) Aug 2008 - Initial set of WG drafts: architecture, YANG, YIN, YANG standard library, DSDL mapping (if there is one/more individual draft), based on WG decisions in Dublin Sep 2008 - Initial DSDL mapping document Oct 2008 - 01 of YANG, DSDL, architecture, YIN, and standard library draft. If split out, -00 of on-the-wire XML draft. Feb 2009 - WGLC for architecture doc Mar 2009 - Submit the architecture doc to the IESG for publication as an Informational RFC Aug 2009 - WGLC for YANG, YIN, XML on-the-wire (if split out), YANG standard library, DSDL mapping Sep 2009 - Submit YANG, YIN, XML on-the-wire (if split out), YANG standard library, DSDL mapping to the IESG for publication as a Proposed Standard _______________________________________________ NGO mailing list NGO@ietf.org https://www.ietf.org/mailman/listinfo/ngo
- [NGO] A proposed WG Charter for NETMOD: NETCONF D… David Partain
- Re: [NGO] A proposed WG Charter for NETMOD: NETCO… Juergen Schoenwaelder
- Re: [NGO] A proposed WG Charter for NETMOD: NETCO… David Partain
- Re: [NGO] A proposed WG Charter for NETMOD: NETCO… Juergen Schoenwaelder
- Re: [NGO] A proposed WG Charter for NETMOD: NETCO… Romascanu, Dan (Dan)
- Re: [NGO] A proposed WG Charter for NETMOD: NETCO… Bert Wijnen - IETF