Using Netgraph for FreeBSD’s Bhyve Networking

submited 20 June 2022

FreeBSD 13 adds new support for a netgraph backend for virtual network devices under bhyve. Netgraph is a modular networking framework that allows for arbitrary stacking of protocols and transports, along with filtering, tunneling, redirection, inspection, injection and more—fast and feature-rich, netgraph is to networking what the geom layer is to disks and storage. This article provides a basic recipe to demonstrate some common netgraph syntax and use-cases.Why might you want to run CURRENT? If you have a large modified code base, or are building a product based on FreeBSD, CURRENT gives you a look into the future of FreeBSD. Running CURRENT will help you understand changes that are happening in the FreeBSD Operating System and it gives you an opportunity to see how your stack performs with new features. In this article we will show how to build a CURRENT system with the debugging features disabled, and perform some benchmarks to test the impact debugging features have on performance.

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