COMMUNICATION METHOD, OPTICAL MODULE AND NETWORK DEVICE

Embodiments of the present invention provide a communication method, an optical module, and a network device. The communication method includes: generating, by an optical module, a first packet according to a service packet that passes through the optical module, wherein a source address of the first packet is the same as a source address of the service packet, a destination address of the first packet is the same as a destination address of the service packet, and the first packet is used to snoop whether a first transmission path from the optical module to a network device exists; sending, by the optical module, the first packet in a transmission direction of the service packet; and receiving, by the optical module, a second packet sent by the network device, wherein the second packet is used to respond to the first packet, and the second packet is used to indicate that the first transmission path from the optical module to the network device exists, and instruct the optical module to communicate with a network management system by using the network device and the first transmission path, wherein a communication path exists between the network device and the network management system. In a case in which a host device of an optical module is not reconstructed, this technical solution can implement that the optical module sends data to a network management system.