Operation method of communication node for mirroring in vehicle network

A first communication node in an Ethernet-based vehicle network comprising a processor and a memory storing at least one instruction executed by the processor, wherein the at least one instruction is configured to:

• receive a first message indicating an operation of a first function of a vehicle from a second communication node among a plurality of communication nodes;
• determine a third communication node performing a second function corresponding to the first function among the plurality of communication nodes based on a first table including function codes of a plurality of functions performed at the vehicle, and to identify at least one port having a VLAN identifier identical to a VLAN identifier corresponding to a function code of the first function based on the second table;
• determine at least one communication node providing data related to the second function among the plurality of communication nodes based on a second table including VLAN identifiers of the plurality of communication nodes connected through a plurality of ports included in the first communication node;
• configure port mirroring for the first function such that a second message received from the at least one communication node is mirrored to the third communication node;
• and
• upon receiving the second message from the at least one communication node, transmit the second message to the third communication node based on the configured port mirroring.