We are excited to announce the release of pybatfish, an open-source Python SDK for Batfish. Batfish is an open-source, multi-vendor network validation framework that enables network engineers, architects and operators to proactively test and validate network design and configuration. It is being used in some of the world’s largest networks to prevent deployment of incorrect configurations that can lead to outages or security breaches.

Batfish simulates the network behavior and builds a model just from device configurations, thus predicting how the network will forward packets and how it will react to failures. This capability of building the model from the just the device configurations enables Batfish to evaluate network changes and guarantee correctness proactively, without requiring configuration changes to be first pushed to the network.

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