Netcastle: Network Infrastructure Testing at Scale

Explore a groundbreaking approach to network infrastructure testing in this 19-minute conference talk from NSDI '24. Dive into the development and implementation of Netcastle, a comprehensive CI/CD network testing system deployed at Meta. Learn how this innovative solution addresses the challenges of maintaining reliability in increasingly complex network environments. Discover how Netcastle supports 11 different networking teams, 68 use-cases, and thousands of test devices, running over 500,000 network tests daily. Gain insights from five years of experience in building and operating this large-scale testing infrastructure, covering device-level firmware, datacenter distributed control planes, and backbone centralized controllers. Understand how Netcastle's approach can help network operators overcome the fear of deploying new technologies while maintaining system stability and performance.