Service processing method, apparatus, device, and system

A service processing system, comprising:

• a first network device configured to:
• receive a service packet, wherein the service packet comprises a destination address and application feature information, the application feature information represents a related feature of an application, and the service packet belongs to the application;
• determine a forwarding policy based on the destination address and the application feature information;
• and
• forward the service packet to a second network device according to the forwarding policy;
• and
• the second network device, configured to:
• receive the service packet;
• and
• send the service packet to a destination device corresponding to the destination address,
• wherein the first network device stores a first policy entry, a second policy entry, and a third policy entry,
• the first policy entry comprises a correspondence between a route prefix, the application feature information, and the forwarding policy,
• the second policy entry stores a correspondence between a route prefix and an identifier of the third policy entry,
• the third policy entry stores a correspondence between the application feature information and the forwarding policy.

A network device, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• receiving, by a first network device, a first service packet, wherein the first service packet comprises a destination address and first application feature information, the first application feature information represents a related feature of a first application, and the first service packet belongs to the first application;
• determining, by the first network device, a first forwarding policy based on the destination address and the first application feature information;
• and
• forwarding, by the first network device, the first service packet according to the first forwarding policy,
• wherein the first network device stores a first policy entry, a second policy entry, and a third policy entry,
• the first policy entry comprises a correspondence between a route prefix, the first application feature information, and the first forwarding policy,
• the second policy entry stores a correspondence between a route prefix and an identifier of the third policy entry,
• the third policy entry stores a correspondence between the first application feature information and the first forwarding policy.