Developing, Deploying, Operating In-House Network Switches at a Massive Scale
summary
FBOSS is Meta’s in-house switch software rewritten to a single SAI-based implementation that lets Meta onboard a second ASIC vendor and run one unified binary across rack, fabric and spine roles. Deployment uses continuous and daily canaries, warmboot upgrades that run over weeks, and a separate qualification pipeline during brownfield migration when some devices require disruptive drain‑upgrade‑un-drain steps. Validation includes over 1000+ test cases, two vendors (Broadcom and Cisco), five active SDKs and more than 10 platforms in production.
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chapters (10)
- 0:00In-house network switches at Meta
- 1:30FBOS Meta’s open switching system
- 2:33FBOS design principles
- 4:41FBOS architecture deep dive
- 6:10Continuous deployment for FBOS
- 8:35New ASIC vendor onboarding
- 12:50Unifying FBOS across ASICs
- 16:23FBOS scale and deployment
- 17:45FBOS outcomes highlights
- 19:12Conclusion
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