Method for generating forwarding information, controller, and service forwarding entity

A method for forwarding a service stream, comprising:

• receiving, by a first service forwarding entity (SFE), forwarding information generated by a controller, wherein the forwarding information is used to enable the first SFE to forward a first part of a service stream to a first service processing entity (SPE) attached to the first SFE, and the forwarding information is further used to enable the first SFE to forward a second part of the service stream to the second SFE along a service function chain;
• receiving, by the first SFE, the service stream;
• forwarding, by the first SFE according to the forwarding information, the first part of the service stream to the first SPE attached to the first SFE;
• and
• forwarding, by the first SFE according to the forwarding information, the second part of the service stream to a second SFE along the service function chain.

A controller, comprising:

• a memory storing instructions;
• and
• a processor coupled to the memory to execute the instructions to:
• determine a first service forwarding entity (SFE) and a second SFE that are used to forward a service stream, wherein the first SFE and the second SFE are on a service function chain corresponding to the service stream;
• generate first forwarding information for the first SFE, wherein the first forwarding information is used to enable the first SFE to forward a first part of the service stream to a first service processing entity (SPE) attached to the first SFE, the first SPE is used to perform service processing on the received first part of the service stream, and the first forwarding information generated by the processor is further used to enable the first SFE to forward a second part of the service stream to the second SFE along the service function chain;
• generate second forwarding information for the second SFE, wherein the second forwarding information is used to enable the second SFE to forward the second part of the service stream to a second SPE attached to the second SFE, and the second SPE is used to perform service processing on the received second part of the service stream;
• a transceiver, configured to:
• send the first forwarding information to the first SFE;
• and
• send the second forwarding information to the second SFE.

A service forwarding entity (SFE), comprising a transceiver, wherein the transceiver is configured to:

• receive forwarding information generated by a controller, wherein the forwarding information is used to enable the SFE to forward a first part of a service stream to a first service processing entity (SPE) attached to the SFE, and the forwarding information is further used to enable the SFE to forward a second part of the service stream to the second SFE along a service function chain;
• receive the service stream;
• forward, according to the forwarding information received by the transceiver, the first part of the service stream received by the transceiver to the first SPE attached to the SFE;
• and
• forward, according to the forwarding information received by the transceiver, the second part of the service stream received by the transceiver to a second SFE along the service function chain.