Information flooding method and device

An information flooding method, comprising:

• receiving, by a second network device, a plurality of packets from a first network device, wherein each of the plurality of packets carries a flooding instance identifier and flooding information that correspond to the packet, a plurality of flooding instances corresponding to the plurality of packets belong to one Interior Gateway Protocol (IGP) instance, and the plurality of flooding instances are respectively associated with different flooding information;
• and
• storing, by the second network device, the flooding information corresponding to the flooding instance identifier.

A network device, applied to a network system comprising a plurality of network devices, wherein the plurality of network devices comprise a first network device, the network device is the first network device, and the network device comprises at least one processor, the at least one processor is coupled to at least one memory, and the at least one processor is configured to execute a computer program or instructions stored in the at least one memory, to cause the network device to:

• obtain a flooding information set, wherein the flooding information set comprises flooding information corresponding to each of a plurality of flooding instances, the plurality of flooding instances are respectively associated with different flooding information, and the plurality of flooding instances belong to one Interior Gateway Protocol (IGP) instance;
• and
• send a plurality of packets, wherein each of the plurality of packets carries a corresponding flooding instance identifier and corresponding flooding information, and the flooding instance identifier is used to identify a flooding instance.