The Open Composable Compatibility test suite is the mechanism to confirm your solution is compatible with other elements of the open composable ecosystem. The OCCL includes multiple running equipment sets interconnected via 100GbE that have been demonstrated to work efficiently together.
A setup typically consists of a network switch (fabric), multiple servers with high speed ethernet NICs installed, an O/S configured for RoCE and NVMe-oF per server (compute), a Western Digital F3x00 fabric device (flash storage), and possibly other fabric attached devices (GPU, FPGA, Disk, etc.). Any element of this set of equipment can be swapped out for the device under test, or a device under test can be added to the set whichever is more appropriate.
The focus of this compatibility check is on the data path. Does the device under test comply with the data center bridging settings used with other elements of the equipment set? If not, what needs to be adjusted? The equipment set is tested under congested network conditions designed to emulate your real world data center traffic.