Method, apparatus, and system for locating root cause of network anomaly, and computer storage medium

A network device, wherein the network device comprises:

• a processor;
• and
• a memory coupled to the processor and storing instructions that, when executed by the processor, cause the network device to be configured to:
• determine an abnormal data flow in a first egress port queue of the network device when a priority traffic control (PFC) deadlock occurs in the first egress port queue, wherein the abnormal data flow comprises an ingress port and an egress port that both are uplink ports of the network;
• and
• send anomaly information to a network management device, wherein the anomaly information comprises an identifier of the abnormal data flow, an identifier of the network device and another identifier of a port in which the first egress port queue is located.

A network management device, comprising:

• a processor;
• and
• a memory coupled to the processor and storing instructions that, when executed by the processor, cause the network management device to be configured to:
• receive anomaly information from a network device, wherein the anomaly information comprises a first identifier of an abnormal data flow in a first egress port queue in the network device, a second identifier of the network device, and a third identifier of a port in which the first egress port queue is located, wherein the abnormal data flow is when a priority traffic control (PFC) deadlock occurs in the first egress port queue, and wherein both an egress port and an ingress port of the abnormal data flow are uplink ports of the network device;
• and
• transmitting the first identifier to a display device.