NIC Diagnosis

Function

Diagnose the connectivity and bandwidth of NPU network ports and output the test result.

**Table 1** Diagnostic items
Item	Diagnosis Duration (Atlas A2 Training/Inference Products)	Diagnosis Duration (Atlas A3 Training/Inference Products)	Whether NPU Training or Inference Is Affected	Application Scenario
nic	5min~10min	50min~70min	Yes	Training or inference service rollout

Parameters

Table 2 lists only a test-specific parameter. For details about other common parameters, see Common Parameters.

**Table 2** Parameter description
Parameter	Description	Mandatory
[-i, --items]	Specifies the diagnosis check item. nic: diagnosis of NPU network port connectivity and bandwidth.	Yes

Example

ascend-dmi -dg -i nic -q

[***@***]# ascend-dmi --dg -i nic --fmt json -q
{
    "DiagnosisItems": [
        {
            "group_name": "Hardware",
            "group_results": "PASS",
            "sub_items": [
                {
                    "item_name": "nic",
                    "item_result": "PASS",
                    "result_array": [
                        {
                            "item_result": "PASS"
                        }
                    ]
                }
            ]
        }
    ],
    "Summary": {
        "Arch": "aarch64",
        "Mode": "Ascend 910",
        "Time": "20250603-16:46:40"
    }
}

Fault Check Items

**Table 3** Fault check items
Command Output	Description
PASS	The NPU network port connectivity is normal and the network port bandwidth reaches the baseline value.
GENERAL_WARN	The NPU network port is down. The network port between NPUs is not connected.
IMPORTANT_WARN	The NPU network port bandwidth does not reach the baseline value.
FAIL	hccn_tool security verification failed. Failed to obtain the NPU network port status. Failed to obtain the NPU network port rate. Failed to obtain the IP address of the NPU network port. Failed to test NPU network port connectivity. Failed to reset the NPU network port. Failed to test NPU network port bandwidth.
SKIP	The product or scenario does not support NIC diagnosis.

Parent topic: Performance Test