Packet sending method and apparatus, and storage medium

A first network device in a plurality of network devices, the plurality of network devices are deployed in a first site, a plurality of tunnels are established between the plurality of network devices deployed in the first site and a second network device deployed in a second site, and the second site performs data transmission with the first site, the first network device comprising:

• a memory storing instructions and storing a flow table, the flow table comprising a plurality of flow entries, each flow entry of the plurality of flow entries comprises a flow identifier and a corresponding outbound interface identifier;
• and
• at least one processor in communication with the memory, the at least one processor configured, upon execution of the instructions, to perform the following steps:
• receive a first data packet of a first data flow from the second site;
• search the flow table for a target flow entry, wherein the target flow entry includes a flow identifier of the first data flow, and wherein the target flow entry is created when the first site sends a second data flow to the second site;
• determine the target flow entry is not found;
• if a network device that does not search for the target flow entry still exists in the plurality of network devices, then send the first data packet to a second network device to indicate that the second network device search a flow table for the target flow entry, the flow table being stored in the second network device, the second network device being a network device that does not search for the target flow entry in the plurality of network devices;
• or
• if the plurality of network devices all search unsuccessfully for the target flow entry, then send the first data packet through a local route.