Instructions

The following table lists the supported traffic sending modes and usage methods for stream tests.

**Table 1** Ascend 950PR and 950DT products
Test Item	Supported Stream Test Mode	Instructions
One-click stream test	UB direct-connect links	When the command for one-click stream test is executed, Ascend DMI automatically sends and receives streams of all lanes on the specified device. After a period of time, the streams are closed and the result is queried.
Customized stream test	Stream test via an external fiber optic circulator (loopback plug) and direct NPU connection. Only UBoE ports are supported.	The customized stream test separates steps for one-click stream test, allowing you to flexibly control the TX and RX directions.
Cross-server stream test	NPUs of the two servers are interconnected through UB FullMesh.	Use MPI to start the Ascend DMI process on the two servers, send streams to specified NPUs, and query the result.

**Table 2** Other products
Test Item	Supported Stream Test Mode	Instructions
One-click stream test	Stream test in a CDR loopback or via a fiber optic circulator	When the command for one-click stream test is executed, Ascend DMI automatically sends and receives streams of all lanes on the specified device. After a period of time, the streams are closed and the result is queried.
Customized stream test	Stream test in a CDR loopback, via a fiber optic circulator, or through direct NPU connections	The customized stream test separates steps for one-click stream testing, allowing you to flexibly control the TX and RX directions and specify the specific lane for stream testing.

Parent topic: Stream Test