Method for obtaining path association information, device, and system

A method for obtaining path association information, wherein the method comprises:

• receiving, by a second network device, a packet from a first network device, wherein the packet carries template indication information;
• determining, by the second network device, a target template based on the template indication information, wherein the target template comprises at least one path association attribute, the at least one path association attribute is attribute information associated with a target forwarding path, and the target forwarding path is a segment routing (SR) policy path;
• and
• performing, by a second network device, based on the target template, an operation associated with the target forwarding path.

A first network device, wherein the first network device comprises:

• a processor;
• and
• a non-transitory memory storing instructions, that when executed by the processor, cause the first network device to perform steps comprising:
• generating a packet, wherein the packet carries template indication information, the template indication information indicates a target template, and the target template comprises at least one path association attribute, the at least one path association attribute is attribute information associated with a target forwarding path, and the target forwarding path is a segment routing (SR) policy path;
• and
• sending the packet to a second network device, wherein the second network device performs, based on the target template indicated by the template indication information, an operation associated with the target forwarding path.

A second network device, wherein the second network device comprises:

• a processor;
• and
• a non-transitory memory storing instructions, that when executed by the processor, cause the second network device to perform steps comprising:
• receive a packet from a first network device, wherein the packet carries template indication information;
• determine a target template based on the template indication information, wherein the target template is associated with a target forwarding path;
• and
• perform, based on the target template, an operation associated with the target forwarding path.