Rela is a tool for checking the correctness of network changes. It provides:

• A domain-specific language for users to describe end-to-end change impacts in a few lines.
• A verifier to check whether a network change implementation satisfies the user's specification.

We also release a dataset we used to benchmark the performance of Rela tool in a complex production network. Please refer to this documentation for more details about this dataset.

The design of Rela language and the experience of using Rela to verify complex, realworld networks are desribed in the paper,

Xieyang Xu, Yifei Yuan, Zachary Kincaid, Arvind Krishnamurthy, Ratul Mahajan and David Walker. 2024. Relational Network Verification. In ACM SIGCOMM 2024 Conference (ACM SIGCOMM ’24), August 4–8, 2024, Sydney, NSW, Australia. ACM, New York, NY, USA, 15 pages. https://doi.org/10.1145/3651890.3672238

Rela supports only Python version 3.7 at this time. Please make sure you are in a Python virtual environement with version 3.7 when executing the following commands.

To install Rela, run the following from the root directory of this repo.

$ pip install .

If not already installed, please use the following to install dependencies.

$ pip install hfst tqdm pytest ipaddress

Verify installation with the following. All unit tests should pass with a correct installation.

$ pytest .

See here for a running example.