Method for NaaS device configuring service

A method for configuring a service, wherein the method comprises:

• obtaining, by a network as a service (NaaS) device having a NaaS function, a contract associated with the service, wherein the contract comprises identifier information, a service type and a condition, the identifier information is used to identify a first device group, the first device group comprises a device that requires the service, the service type identifies a type of the contract, and the condition is a communication requirement corresponding to the service;
• determining, by the NaaS device, a network device group according to the identifier information and the condition, where the network device group comprises one or more network devices satisfying the condition;
• determining, by the NaaS device, the type of the contract based on the service type;
• determining, by the NaaS device, a first forwarding rule according to the condition, wherein the first forwarding rule corresponds to the network device group, and wherein the determining the first forwarding rule comprises:
• performing, by the NaaS device, a conflict check on the first forwarding rule of a first device and a second forwarding rule, wherein the second forwarding rule is a forwarding rule that is already configured on the first device;
• and
• if the first forwarding rule of the first device conflicts with the second forwarding rule, determining, by the NaaS device, a calibrated forwarding rule of the first device;
• and
• sending, by the NaaS device, the information about the network device group and a determined forwarding rule, wherein the determined forwarding rule is the first forwarding rule or the calibrated forwarding rule of the first device.