Dataplane equivalence and its applications


Dragos Dumitrescu, Radu Stoenescu, Matei Popovici, Lorina Negreanu, and Costin Raiciu, University Politehnica of Bucharest


We present the design and implementation of netdiff, an algorithm that uses symbolic execution to check the equivalence of two network dataplanes modeled in SEFL. We use netdiff to find new bugs in Openstack Neutron, to test the differences between related P4 programs and to check the equivalence of FIB updates in a production network. Our evaluation highlights that equivalence is an easy way to find bugs, scales well to relatively large programs and uncovers subtle issues otherwise difficult to find.

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@inproceedings {227619,
author = {Dragos Dumitrescu and Radu Stoenescu and Matei Popovici and Lorina Negreanu and Costin Raiciu},
title = {Dataplane equivalence and its applications},
booktitle = {16th {USENIX} Symposium on Networked Systems Design and Implementation ({NSDI} 19)},
year = {2019},
isbn = {978-1-931971-49-2},
address = {Boston, MA},
pages = {683--698},
url = {},
publisher = {{USENIX} Association},