Reinventing Facebook’s data center network

What this post added

This post details the reinvention of Facebook's data center network to address increasing demand and physical constraints. Key technical contributions include the F16 fabric design, which uses 100G CWDM4-OCP optics to achieve 4x capacity with fewer fabric chips and reduced power consumption compared to 400G alternatives. The development of the Minipack switch, a modular and flexible building block consuming 50% less power and space, is also highlighted, along with its contribution to OCP. The post also introduces HGRID, an evolution of Fabric Aggregator, designed to scale aggregation to six buildings per region and flatten the regional network for improved East-West traffic and uplink bandwidth.