Deploying a Layer 3 CLOS Fabric with Cumulus Linux Switches and Cisco UCS Fabric Interconnects

Updated: November 5, 2025
Originally published: July 7, 2015


This technical design guide from GDT System Engineer Richard Kiles provides a detailed overview and design recommendations for integrating network switches running Cumulus Linux with Cisco UCS Fabric Interconnects. The examples presented provide a highly available and redundant network fabric to support systems and services residing within a Cisco UCS compute environment. This design guide also outlines a framework for interconnecting multiple pods of UCS compute environments using Cumulus Linux switches configured in a Layer 3 CLOS fabric, providing a cost effective solution for an immensely scalable and predictable network architecture.

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