COMMUNICATION SYSTEM, CONTROLLER, COMMUNICATION METHOD, AND PROGRAM

摘要

In a centrally controlled communication system where a packet loss may occur in a switch on a forwarding path, transmission of a packet of a high-priority protocol is enabled. The communication system includes a group of switches which process a received packet(s) by referring to a flow entry that defines processing content to be applied to the packet(s) and a controller that controls the group of switches. The controller comprises a topology detection unit that detects a network topology composed of a link(s) satisfying predetermined transmission quality from among links connecting respective ones of the switches, based on information obtained from the group of switches. When communication using a predetermined communication protocol that requires the predetermined communication quality occurs between arbitrary nodes, the controller creates a flow entry to be applied to a packet(s) of the predetermined communication protocol, and then set the created flow entry in each switch on a path set between the arbitrary nodes.

主权项

1. A communication system,
said system comprising: a group of switches which processes a received packet(s) by referring to a flow entry that defines processing content to be applied to the packet(s) and a controller that controls the switches by setting the flow entry in one of the group of switches; whereinthe controller comprises a topology detection unit that detects a network topology composed of a link(s) satisfying predetermined transmission quality from among links connecting respective ones of the group of switches, based on information obtained from the group of switches; and
when communication using a predetermined communication protocol that requires the predetermined communication quality occurs between arbitrary nodes associated with the network topology, the controller creates a flow entry to be applied to a packet of the predetermined communication protocol and then sets the created flow entry in each switch on a path set between the arbitrary nodes.