Control device and control method in SDN network

A control device in a software-defined network (SDN), the SDN comprising a switching device, and the control device comprising:

• a memory comprising instructions;
• and
• a processor coupled to the memory, the instructions causing the processor to be configured to:
• acquire flow table capability information of the switching device;
• perform, according to the flow fable capability information and the matching policy, policy matching on the switching device that data needs to pass through during forwarding;
• generate a flow table for forwarding the data by the switching device that the data needs to pass through during forwarding;
• allocate an action that needs to be executed in the flow table;
• make the following adjustment to the flow table that comprises matched inport:
• inport tables of all other matching policies except a matching policy for layer 2 forwarding match a DstMac field to distinguish between services when the DstMac field exists in an inport table of the switching device, a jump being performed randomly between tables;
• inport tables of all matching policies need to match a same field when no DstMac field exists in the inport table of the switching device and the inport table is a wildcard match table, a smaller table identifier (ID) of a flow table entry goto indicating a higher set priority;
• and
• in an action of the flow table entry of the inport table, goto table can jump only to a next table when no DstMac field exists in the inport table, and the inport table is an exact match table;
• and
• send the flow table to the switching device that the data needs to pass through during forwarding.

A control method in a software-defined network (SDN), the SDN comprising at least one switching device, and the method comprising:

• acquiring flow table capability information of the switching device;
• setting a matching policy used to match capability information of the switching device and to acquire a flow table for forwarding data by the switching device, the matching policy comprising:
• a first matching policy requiring that all requirements of the data forwarding be met and requiring that all actions required during the data forwarding be executed;
• a second matching policy not requiring that all requirements of the data forwarding be met and requiring that one of the actions supported by the switching device be executed;
• and
• a third matching policy requiring that a lowest requirement of the data forwarding be met and requiring that one of the actions that needs to be executed during the data forwarding be executed;
• performing, according to the flow table capability information and the matching policy, policy matching on the switching device that data needs to pass through during forwarding;
• generating a flow table for forwarding the data by the switching device that the data needs to pass through during forwarding;
• allocating an action that needs to be executed in the flow table;
• and
• sending the flow table to the switching device that the data needs to pass through during forwarding.