Update Openconfig post

content/post/2019-03-18-config-multivendor-network-devices.md

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+---
+date: 2019-03-11T00:00:00-00:00
+description: "Simple, efficient, and faster way to config multivendor network devices"
+featured_image: https://networkreliability.engineering/images/nrelabs.png
+tags: [provisioning]
+title: "Vendor Neutral Network Management Using OpenConfig"
+show_reading_time: true
+authors:
+- name: Raymond Lam
+  link: https://github.com/jnpr-raylam
+- name: Tony chan
+  link: https://github.com/valjeanchan
+---
+
+### Network Management in Multivendor Environment
+Network management in a multivendor environment is always challenging. Each vendors
+may implement things differently:
+
+- different configuration model and syntax (e.g. IOS vs Junos Config)
+- different provisioning methods (CLI, SNMP, Netconf, TL1, etc)
+- different operation (show) commands and different output formats
+
+People tried to solve this problem by using SNMP since 1988, however it's proven
+that SNMP is not the solution for configuration provisioning due to inflexibility
+of config by individual MIB object changes. Using one OID per data point is neither scalable
+nor flexible enough for a multivendor environment.
+
+The industry need a new way to perform network management.
+
+### Industry led data model reform
+Large network operators, especially Telcos and Over the Top Technology Companies,
+are not uncommon to have multivendor network environment. They have a huge network infrastructure
+to run, and automation is the only way to mange network at such scale (say 10000+ devices).
+
+Traditionally, people write different device drivers for their automation platform,
+as different vendors has different provisioning mechanism. However this become costly to
+introduce new vendors to the system with the driver development cost. People wants a way to
+lower the cost to introduce new equipment and also shorten the time to service.
+This drives the industry to a consent to build a common set of data modeling and provision
+mechanism to ease automation, which becomes OpenConfig.
+
+# YANG and OpenConfig
+First of all, based on the lessons  learnt from the SNMP, a flexible and extensible data model is needed.
+[YANG](https://tools.ietf.org/html/rfc6020) is selected as the data modeling language used to model configuration and state data, and manipulated by [Netconf Protocol](https://tools.ietf.org/html/rfc4741#section-1.1) (rpc and notifications). As YANG is protocol independent, YANG data models can be used independent of the transport protocols and can be converted into any encoding format supported by the network configuration protocols (such as GRPC).
+
+[OpenConfig](http://www.openconfig.net/), based on actual operational needs from use cases and requirements from multiple network operators, is an informal working group of network operators focusing on developing a consistent set of **vendor-neutral** data models using YANG. OpenConfig data models define the configuration and operational state of network devices for common network protocols or services. It formed the foundation of vendor neutral configuration
+and become the defacto interface between the network manage system and the networking device. By using OpenConfig,
+the network management system no longer required different device drivers per vendor and a common provision method can be used for all vendors. Introduction of new vendor into the system become seamless and instant.
+
+Juniper has been actively participate in and contributed to the development of OpenConfig. Netconf and YANG (which is closely derived from Junos DDL) has been used in Junos since 2003 and become the foundation of OpenConfig.
+
+If you're interested in this vendor neutral network management and would like to get a hands-on experience, we have created a simple tutorial on OpenConfig on Junos. There are four chapters in the lesson which guide you through the basics of YANG model and OpenConfig, and we also provide a live environment where you can provision using OpenConfig. Check out our tutorial on the NRE-Labs - [Vendor neutral configuration provisioning using YANG and OpenConfig](https://labs.networkreliability.engineering/labs/?lessonId=26&lessonStage=1), and leave your comments and feedback.