Communication method and related apparatus

An apparatus, wherein the apparatus comprises:

• at least one processor;
• at least one non-transitory computer-readable storage medium storing a program to be executed by the at least one processor, the program including instructions to cause the apparatus to:
• obtain first link layer topology information corresponding to a first network slice;
• obtain second link layer topology information corresponding to a second network slice;
• determine, based on the first link layer topology information and the second link layer topology information, that a link layer topology of the first network slice comprises a link layer topology of the second network slice;
• and
• receive network layer topology information that is sent by a second network device and that is of the first network slice;
• and
• determine network layer topology information of the second network slice based on the second link layer topology information and the network layer topology information of the first network slice.

A non-transitory storage medium storing a program, which when executed by one or more processors, cause the one or more processors to perform operations, the operations comprising:

• obtaining, by a first network device, first link layer topology information corresponding to a first network slice;
• obtaining, by the first network device, second link layer topology information corresponding to a second network slice;
• determining, by the first network device based on the first link layer topology information and the second link layer topology information, that a link layer topology of the first network slice comprises a link layer topology of the second network slice;
• receiving, by the first network device, network layer topology information that for the first network slice and that is sent by a second network device;
• and
• determining, by the first network device, network layer topology information of the second network slice based on the second link layer topology information and the network layer topology information of the first network slice.