Communication terminal, communication method, and program

A switch configured to process a packet, comprising:

• a memory storing program instructions;
• and
• a processor configured to execute the program instructions to:
• receive a request for controlling the switch from one of a plurality of controllers configured to control the switch;
• access control information corresponding to the request, based on authority information corresponding to each of the plurality of controllers,
• wherein the authority information represents an authority to control the switch.

A communication system comprising:

• a switch configured to process a packet;
• and
• a plurality of controllers configured to control the switch, wherein the switch comprises:
• a memory configured to store program instructions;
• and
• a processor configured to execute the program instructions to:
• receive a request for controlling the switch from one of the plurality of controllers;
• and
• access a control information corresponding to the request, based on an authority information corresponding to each of the plurality of controllers,
• wherein the authority information represents an authority to control the switch.