Packet processing method and system, and device
The application disclose a packet processing method that includes: receiving, by a service distribution node, service routing information sent by a controller, where the service routing information includes a flow identifier, a service identifier, and a next-hop address, the flow identifier is used to identify a packet flow, the service identifier is used to identify a sequence of a service node instance that processes the packet flow, and the next-hop address is used to identify the service node instance that processes the packet flow; receiving a first packet; acquiring a first flow identifier according to the first packet, and searching the service routing information according to the first flow identifier to acquire a matched service identifier and a matched next-hop address; and sending a second packet to a first service node instance that has the matched next-hop address, which implements service processing on a packet flow.
1. A method, comprising:
obtaining, by a controller, a first flow identifier, a first service identifier, and a first next-hop address, wherein the first flow identifier uniquely identifies a packet flow, the first service identifier is uniquely allocated to the packet flow, the first service identifier identifies a sequence of a plurality of service node instances that process the packet flow, and the first next-hop address identifies the address of a first service node instance of the plurality of service node instances that processes the packet flow; and
sending, by the controller, the first flow identifier, the first service identifier and the first next-hop address to a service distribution node.
2. The method according to claim 1 , further comprising:
obtaining, by the controller, a second next-hop address, wherein the second next-hop address identifies the address of the first service node instance that processes the packet flow; and
sending, by the controller, the first service identifier and the second next-hop address to a second service node instance.
3. The method according to claim 1 , wherein the first flow identifier comprises 5-tuple information of the packet flow.
4. The method according to claim 1 , wherein the address of the first service node instance is an IP address of the first service node instance.
5. A controller, comprising:
a processor; and
a transmitter;
wherein the processor is configured to:
obtain a first flow identifier, a first service identifier, and a first next-hop address, wherein the first flow identifier uniquely identifies a packet flow, the first service identifier is uniquely allocated to the packet flow, the first service identifier identifies a sequence of a plurality of service node instances that process the packet flow, and the first next-hop address identifies an address of a first service node instance of the plurality of service node instances that processes the packet flow; and
wherein the transmitter is configured to send the first flow identifier, the first service identifier, and the first next-hop address to a service distribution node.
6. The controller according to claim 5 , wherein the processor is further configured to:
obtain a second next-hop address, wherein the second next-hop address identifies the address of the first service node instance that processes the packet flow; and
wherein the transmitter is further configured to send the first service identifier and the second next-hop address to a second service node instance of the plurality of service node instances.
7. The controller according to claim 5 , wherein the first flow identifier comprises 5-tuple information of the packet flow.
8. The controller according to claim 5 , wherein the address of the first service node instance is an IP address of the first service node instance.
9. A non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause a computer to:
obtain a first flow identifier, a first service identifier, and a first next-hop address, wherein the first flow identifier uniquely identifies a packet flow, the first service identifier is uniquely allocated to the packet flow, the first service identifier identifies a sequence of a plurality of service node instances that process the packet flow, and the first next-hop address identifies an address of a first service node instance of the plurality of service node instances that processes the packet flow; and
send, using a transmitter, the first flow identifier, the first service identifier, and the first next-hop address to a service distribution node.
10. The non-transitory computer readable storage medium according to claim 9 , wherein the instructions, when executed by the processor, further cause the computer to:
obtain a second next-hop address, wherein the second next-hop address identifies the address of the first service node instance that processes the packet flow; and
send, using the transmitter, the first service identifier and the second next-hop address to a second service node instance of the plurality of service node instances.
11. The non-transitory computer readable storage medium according to claim 9 , wherein the first flow identifier comprises 5-tuple information of the packet flow.
12. The non-transitory computer readable storage medium according to claim 9 , wherein the address of the first service node instance is an IP address of the first service node instance.