A SAN testing application may be provided to restrict the utilization of one or more SAN device resources. The restricted, or throttled, resource(s) enables a smaller load to stress a SAN switch to effectively emulate a larger load. Resource throttling may, for example, result in the rapid filling of switch buffers and corresponding computational stress. The emulated load allows for all ports of a SAN switch to be simultaneously tested without the need or expense of a large number computing devices stressing the SAN. The SAN device with throttled resource(s) may be located within a testing environment or may be located in a functioning SAN to determine SAN bottlenecks prior to critical loading.