发明名称 |
COMMUNICATION SYSTEM, SWITCH, CONTROLLER, METHOD FOR CONSTRUCTING A CONTROL CHANNEL AND PROGRAM |
摘要 |
The controller sets control information in a switch over a control channel to control the switch. The switch includes a packet processing unit that processes a packet received based on control information as set from the controller, and a Layer-2 forwarding unit that learns an input port of a control packet between the controller and a neighboring switch or switches and that forwards the control packet on the basis of learned results. The switch also includes an alternative control channel construction unit that, on detecting a disconnection of the control channel, sends a packet requesting a resolution of a Layer-2 address of the controller to the neighboring switch or switches. The alternative control channel construction unit acquires the Layer-2 address from the controller via the neighboring switch or switches and transmits the control packet to the controller using the Layer-2 address acquired to construct a second control channel between the switch and the controller. |
申请公布号 |
US2015381476(A1) |
申请公布日期 |
2015.12.31 |
申请号 |
US201414766008 |
申请日期 |
2014.02.25 |
申请人 |
NEC CORPORATION |
发明人 |
OSHIMA Takahiro;GAO Fei |
分类号 |
H04L12/703;H04L12/721;H04L12/741;H04L12/24 |
主分类号 |
H04L12/703 |
代理机构 |
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代理人 |
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主权项 |
1. A communication system, comprising:
a controller; and a switch; the controller setting control information in the switch over a control channel to control the switch; the switch including: a packet processing unit that processes a packet received on the basis of the control information as set from the controller; a Layer-2 forwarding unit that learns an input port of a control packet between the controller and another switch or switches and that forwards the control packet on the basis of learned results; and an alternative control channel construction unit that, on detecting a disconnection of the control channel, sends a packet requesting a resolution of a Layer-2 address of the controller to a neighboring switch or switches; the alternative control channel construction unit acquiring the Layer-2 address from the controller via the neighboring switch or switches and transmitting the control packet to the controller using the Layer-2 address acquired to construct a second control channel between the switch and the controller. |
地址 |
Minato-ku, Tokyo JP |