Method of managing frame and switch and network structure thereof

A switch using a method of setting frame, comprising

• a plurality of ports;
• a plurality of buffer groups, each of said plurality of buffer groups comprising a plurality of queues, each of said plurality of buffer groups corresponding to each of said plurality of ports respectively, wherein a queue of said plurality of queues is predetermined to have a first processing priority level, and the rest of said plurality of queues are predetermined to have a second processing priority level, and said queue having said first processing priority level is processed in advance of the rest of said plurality of queues having said second processing priority level;
• and
• an allocation means used for allocating a control frame to said queue having said first processing priority level, wherein said control frame is used for providing a control signal required for the operation of said switch.

A network structure using a method of setting frame, comprising

• a first network connection device;
• a second network connection device comprising a first port and a second port, wherein said first port is connected to said network connection device via a network connection, and said first port has a first buffer group of which a first queue is assigned a first processing priority level higher than that assigned to other first queues in said first buffer group, and said second port has a second buffer group of which a second queue is assigned a second processing priority level higher than that assigned to other second queues in said second buffer group;
• and
• a control device outputting a control frame used for controlling said first network connection device, wherein said control frame is temporarily stored in said first queue, and then is transmitted to said first network connection device via said first port.