Network controller, cluster system, and non-transitory computer-readable recording medium having stored therein control program

A cluster system including a first processing device and a second processing device and being communicably connected with a connection destination device, the cluster system comprising a processor, being disposed in the second processing device, that:

• in a case where a communication counterpart with the communication destination device is switched from the second processing device to the first processing device,
• sets a virtual communication interface;
• generates a dummy packet that causes a receiver of the dummy packet to falsely recognize that the dummy packet is transmitted from the connection destination device;
• process the generated dummy packet as if the generated dummy packet is received via the virtual communication interface;
• obtains communication progress information representing a communication progress state of communication of the second processing device with the connection destination device, the communication progress information being output in response to the dummy packet;
• generates a reset packet containing the communication progress information using the obtained communication progress information;
• removes, based on the reset packet, connection record information of the second processing device and the connection destination device, the connection record information being stored in the second processing device;
• outputs the dummy packet containing provisional communication progress information;
• outputs a response packet containing the communication progress information managed in the second processing device from the virtual communication interface in response to the dummy packet;
• and
• generates the reset packet using the communication progress information contained in the response packet.

A non-transitory computer-readable recording medium having stored therein a control program for a cluster system including a first processing device and a second processing device and being communicably connected with a connection destination device, the control program causing a processor included in the second processing device to execute a process comprising:

• in a case where a communication counterpart with the communication destination device is switched from the second processing device to the first processing device,
• setting a virtual communication interface;
• generating a dummy packet that causes a receiver of the dummy packet to falsely recognize that the dummy packet is transmitted from the connection destination device;
• processing the generated dummy packet as if the generated dummy packet is received via the virtual communication interface;
• obtains communication progress information representing a communication progress state of communication of the second processing device with the connection destination device, the communication progress information being output in response to the dummy packet;
• generating a reset packet containing the communication progress information using the obtained communication progress information;
• removing, based on the reset packet, connection record information of the second processing device and the connection destination device, the connection record information being stored in the second processing device;
• outputting the dummy packet containing provisional communication progress information;
• outputting a response packet containing the communication progress information managed in the second processing device from the virtual communication interface in response to the dummy packet;
• and
• generating the reset packet using the communication progress information contained in the response packet.