Communication system, path control apparatus, packet forwarding apparatus 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
Inactive Publication Date: 2012-11-14
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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Provided is a communication system whereby even when there exist a plurality of types of links of packet forwarding apparatuses forming a communication network, flow paths can appropriately be established. A packet forwarding apparatus information storing means (71) stores, for each of a plurality of packet forwarding apparatuses, the identifier of the packet forwarding apparatus, the port identifier of each of a plurality of ports of the packet forwarding apparatus, and the type of a link connected to each port of the packet forwarding apparatus. A link type determining means (73), when having received a new-flow detection notification from a packet forwarding apparatus (80), determines the type of a link, along which a packet received by the packet forwarding apparatus passes, on the basis of the identifier and port identifier of the packet forwarding apparatus included in the new-flow detection notification and further on the basis of the information stored in the packet forwarding apparatus information storing means (71). A path calculating means (74) calculates, based on topology information related to the determined type of the link, a communication path of the packet.
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): H04L12/56H04L45/02H04L45/42
CPCH04L45/30H04L49/253H04L45/64H04L45/02H04L45/42
Inventor 秋好一平
Owner NEC CORP