Communication system, path control device, packet forwarding device, and path control method
A packet forwarding device and path control technology, applied in the field of communication systems, can solve the problem of not setting flow entry information, etc.
Inactive Publication Date: 2016-01-20
NEC CORP
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Problems solved by technology
However, when flow switch 120 receives a packet transmitted from communication terminal 130 to communication terminal 132 for the first time, flow entry information suitable for the packet is not set
Method used
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[0060] Preferred exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.
[0061] figure 1 is a block diagram showing an example of the communication system of the present invention. The communication system of the present invention includes a path control device 10 and packet forwarding devices 20 to 25 belonging to the communication network 1 . exist figure 1 In, six packet forwarding devices 20 to 25 are shown, but figure 1 The communication system in is merely an illustrative example, and the number and topology of packet forwarding devices are not limited to figure 1 The example shown in . exist figure 1 In the example shown in , communication terminal 30 is connected to packet forwarding device 20 , communication terminal 31 is connected to packet forwarding device 21 , and communication terminals 32 and 33 are connected to packet forwarding device 25 . Then, each packet forwarding device forwards packe...
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To provide a communication system capable of defining an appropriate flow path even when there are two or more types of links forming a packet forwarding device of a communication network. The packet forwarding device information storage means 71 stores, for each packet forwarding device, an identifier of the packet forwarding device, a port identifier of each port of the packet forwarding device, and a link connected to each port of the packet forwarding device. type of road. When a new flow detection notification is received from the packet forwarding device 80, the link type determining means 73 is based on the identifier of the packet forwarding device and the port identifier included in the new flow detection notification and the The information stored in the packet forwarding device information storage unit 71 is used to determine the type of link through which the packet received by the packet forwarding device passes. The path calculation means 74 calculates a communication path for the packet based on the topology information on the determined type of link.
Description
technical field [0001] The present invention relates to a communication system, a path control device, a packet forwarding device, a path control method, a path control program, and a program for the packet forwarding device. In particular, the present invention relates to a communication system including a packet forwarding device for forwarding a packet and a path control device for controlling packet forwarding of the packet forwarding device to control a communication path, and the path control device applicable to the communication system, The packet forwarding device, path control method, path control program, and program for the packet forwarding device. Background technique [0002] An example of a communication system including a flow switch for forwarding a packet and a flow switch for controlling packet forwarding by the flow switch to control a communication path is described in Patent Literature (PTL) 1 and Non-Patent Literature (NPL) 1 and 2. Path control equi...
Claims
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IPC IPC(8): H04L12/70H04L45/02H04L45/42
CPCH04L45/30H04L45/64H04L45/02H04L45/42H04L49/253
Inventor 秋好一平
Owner NEC CORP