Description: YANG is a data modeling language used to model the configuration and state data of network devices. Its design is based on the need to provide a structured and readable format for data representation, facilitating interoperability between different systems and devices. YANG allows network engineers to define the structure of data hierarchically, using an approach similar to XML but with a more simplified and programming-oriented syntax. This language is particularly relevant in the context of modern networks, where automation and configuration management are essential for the efficient operation of network infrastructures. Additionally, YANG integrates closely with the NETCONF protocol, which allows for the remote and secure manipulation of network device configurations. YANG’s ability to model both the configuration and state of devices makes it a powerful tool for managing complex networks, enabling network administrators to implement changes more quickly and effectively, as well as monitor the state of devices in real-time.
History: YANG was developed by the IETF (Internet Engineering Task Force) and was first introduced in 2010 as part of an effort to standardize data modeling in networks. Its creation was driven by the need for a language that could address the limitations of other modeling languages, such as XML and SNMP, providing a more efficient and clear way to represent the configuration and state of network devices. Since its introduction, YANG has evolved and been widely adopted in the telecommunications and networking industry, becoming a key standard for network automation and management.
Uses: YANG is primarily used in the configuration and management of network devices, allowing administrators to define and manipulate configurations in a structured manner. It is particularly useful in environments where automation is required, as it enables integration with network management tools and orchestration systems. Additionally, YANG is used in the implementation of protocols such as NETCONF and RESTCONF, which facilitate remote communication and management of network devices.
Examples: A practical example of YANG’s use is in configuring routers and switches via NETCONF, where administrators can use YANG models to define the desired configuration and apply changes efficiently. Another example is its use in network management platforms, which utilize YANG to model device configurations and facilitate network automation tasks.
