Network devices have always been considered as configurable black boxes until the
emergence of software-defined networking (SDN). SDN enables the networks to be …

Software Defined Networking (SDN) and cloud automation enable a large number of diverse
parties (network operators, application admins, tenants/end-users) and control programs …

We present the design and implementation of p4v, a practical tool for verifying data planes
described using the P4 programming language. The design of p4v is based on classic …

Software-defined networking (SDN) is an innovative network architecture that splits the
control and management planes from the data plane. It helps in simplifying network …

The packet forwarding behaviour of a network relies on the forwarding rules residing in the
networking element (eg switches and routers) to forward packets. This applies to both …

ABSTRACT P4 allows a new level of dynamism for routers beyond Open-Flow 1.4 by
allowing headers and tables to be modified by software in the field. Without care, P4 can …

Network operators often need to adapt the configuration of a network in order to comply with
changing routing policies. Evolving existing configurations, however, is a complex task as …

Real-time network verification promises to automatically detect violations of network-wide
reachability invariants on the data plane. To be useful in practice, these violations need to …

Recent work has made great progress in verifying the forwarding correctness of networks
[26–28, 35]. However, these approaches cannot be used to verify networks containing …

Not all important network properties need to be enforced all the time. Often, what matters
instead is the fraction of time/probability these properties hold. Computing the probability of …