Switching device, communication control method and communication control program

A switching device relaying data in an on-vehicle network and having a plurality of communication ports, comprising:

• a detection unit that detects a failure in communication with another switching device connected to one of the communication ports;
• and
• a processing unit that transmits failure information indicating at least any one of a site where the failure in communication occurs and a communication port to be used when the failure in communication occurs by a target switching device being a switching device different from said another switching device, to the target switching device if the failure in communication is detected by the detection unit.

A switching device relaying data in an on-vehicle network and having a plurality of communication ports, comprising:

• a storage unit that stores usage port information indicating a correspondence among destination address information, the communication port to be used at a normal time and a failure-occurrence-time port being at least one of the communication ports to be used when a failure in communication occurs;
• and
• a processing unit that decides one of the communication ports of the switching device of itself to be used for transmission of the data based on the destination address information included in the data and the usage port information if the data including failure information indicating a failure in communication between other switching devices is received by the switching device of itself.

A communication control method in a switching device relaying data in an on-vehicle network and having a plurality of communication ports, comprising:

• detecting a failure in communication with another switching device connected to one of the communication ports;
• and
• transmitting failure information indicating at least any one of a site where the failure in communication occurs and a communication port to be used when the failure in communication occurs by a target switching device being a switching device different from said another switching device, to the target switching device if the failure in communication is detected.

A communication control method in a switching device relaying data in an on-vehicle network and having a plurality of communication ports and a storage unit, the storage unit storing usage port information indicating a correspondence among destination address information, the communication port to be used at a normal time and a failure-occurrence-time port being at least one of the communication ports to be used when a failure in communication occurs, comprising:

• receiving the data;
• and
• deciding one of the communication ports of the switching device of itself to be used for transmission of the data based on the destination address information included in the data and the usage port information if the data including failure information indicating a failure in communication between other switching devices is received by the switching device of itself.

A communication control program used in a switching device switching device relaying data in an on-vehicle network and having a plurality of communication ports causing a computer to function as:

• a detection unit that detects a failure in communication with another switching device connected to one of the communication ports;
• and
• a processing unit that transmits failure information indicating at least any one of a site where the failure in communication occurs and a communication port to be used when the failure in communication occurs by a target switching device being a switching device different from said another switching device, to the target switching device if the failure in communication is detected by the detection unit.

A communication control program used in a switching device relaying data in an on-vehicle network and having a plurality of communication ports and a storage unit, the storage unit storing usage port information indicating a correspondence among destination address information, the communication port to be used at a normal time and a failure-occurrence-time port being at least one of the communication ports to be used when a failure in communication occurs, causing a computer to function as:

• a processing unit that decide one of the communication ports of the switching device of itself to be used for transmission of the data based on the destination address information included in the data and the usage port information if the data including failure information indicating a failure in communication between other switching devices is received by the switching device of itself.