The Power of Standardization: REST APIs & Network Automation

vRealize Automation


With the continuous growth and evolution of networks, managing them has become increasingly complex. Traditional methods of network management, which often involve manual configurations, are not scalable and are error-prone. Enter the world of Network Automation and the use of RESTful APIs.

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1. What is REST?

REST stands for Representational State Transfer. It’s an architectural style for designing networked applications. RESTful services use HTTP requests to post data (create/update), read data (making queries), and delete data.

Characteristics of REST:

  • Stateless: Each request from a client to a server must contain all the information needed to understand and process the request. The server should not store session information between requests.
  • Client-Server: RESTful applications are client-server based. The client is responsible for the user interface and user experience, while the server stores the data and handles the backend.
  • Cacheable: Responses from the server can be cached on the client side to improve performance.

2. REST APIs in Network Automation

REST APIs have become the de facto standard in network automation. With a REST API, network devices can be managed, configured, and monitored programmatically. Here’s how:

  • Configuration Management: Apply configurations to multiple devices simultaneously without manual intervention.
  • Monitoring: Extract vital stats and operational data from devices, which can be fed into monitoring systems for analytics and trend prediction.
  • Troubleshooting: Run diagnostic commands and fetch results programmatically.

3. Benefits of Using REST APIs in Network Automation

  • Scalability: Manage thousands of devices with a single script or application.
  • Consistency: Apply configurations consistently across multiple devices, reducing human errors.
  • Flexibility: Integrate with other systems and databases easily.
  • Speed: Automation tasks that once took hours can now be completed in minutes.

4. Challenges and Solutions

  • Security: With the power of automation, mistakes or malicious acts can have a larger impact. Solution: Implement robust authentication and authorization methods, and always validate data before making changes.
  • Complexity: As networks grow, so does the complexity of the automation tasks. Solution: Use version control, modularize your scripts, and always document your processes.

5. Examples of Network Automation with REST APIs

  1. Bulk Configuration: Imagine you need to change the SNMP community string on 1,000 devices. With a REST API and automation script, you can do this in minutes without manual logins.
  2. Real-time Monitoring: Using REST APIs, you can extract real-time data from your devices and feed it into a monitoring system, allowing for faster response times to issues.
  3. Automated Backups: Schedule automated backups of device configurations and store them in a centralized repository.


The combination of REST APIs and network automation offers unparalleled benefits in managing modern networks. It reduces human errors, increases efficiency, and provides scalability. As with all powerful tools, it’s essential to use them responsibly and securely. Embracing these technologies is no longer a luxury but a necessity in today’s rapidly changing IT landscape.

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