1. draft-bogdanovic-netmod-yang- model-classification-03 IETF 92 Dallas NETMOD WG B. Claise, C. Moberg, Cisco Systems D. Bogdanovic Juniper Networks

2. Reasons for draft YANG becoming de facto standard language for modeling Used across the IETF, across SDOs, industry consortiums, open source projects Create common nomenclature for classifying models Stems from discussion with the YANG Model Coordination Group

3. First dimension – Layer Model option 1 Metro Ethernet Service (“Business VPN Gold”) Metro Ethernet Service (“Business VPN Gold”) L3 VPN iBGP MPLS Interface Routing options Routing options Business Service Model (Customer Facing Service, in MEF) Not in YANG - Catalogues Network Service YANG Model (Resource Facing Service, in MEF) Configuration Models Network Element YANG Model

4. Definitions Network Service YANG Model: an abstract view, in YANG, of a service deployed on one or multiple network elements. – Ex: the new L3SM (L3VPN Service Model) WG Network Element YANG Model: describe the configuration parameters, in YANG, of a specific device technology or feature. Note: in the newly posted v2. An oversight in v1

5. First dimension – Layer Model option 2 5 layer model Metro ethernet service Pseudowire MPLS L2VPN iBGP MPLS Interface Routing options Routing options Routing Instances Routing Instances Business service model Network service model Config models Pseudowire MPLS RSVP Service Components Service model Vendor A Vendor B Vendor C Vendor prop models Standard models

6. Second dimension – Model Type Network element Standard YANG Model Proprietary extension to std YANG model Proprietary extension to std YANG model Vendor configuration Model (CLI, YANG, etc) Vendor configuration Model (CLI, YANG, etc) Proprietary YANG model Proprietary YANG model Standard Extension

7. How does it fit together? OSS/BSS Network element Orchestrator Service model Standard YANG Model Proprietary ext to std YANG model Proprietary ext to std YANG model Vendor configuration model Vendor configuration model Proprietary YANG model Proprietary YANG model Standard Extension

8. What’s new in v2 Definitions addition Integration of Jürgen S.’ feedback on the netmod mailing list