Minipack2 is a 4U modular switch developed by Meta and manufactured by Celestica.1

As shown in the image above2, it has eight Port Interface Modules (PIMs), and each PIM has:

This provided a total of up to 128x 200G or 64x 400G ports.

Minipack2 was released as an OCP specification, and its configuration is detailed extensively in [Minipack2 Generic OCP spec]2.

Footnotes

  1. OCP: Meta updates Facebook’s data center switches, moves to SAI open source API - DCD (datacenterdynamics.com)

  2. Minipack2_Generic_OCP_Specification_rev1.0 (opencompute.org) 2