| US 7,603,480 B2 | ||
| System using pseudo redundant configurator to switch network devices between operating and standby states | ||
| Tetsuo Imai, Tokyo (Japan); Soichiro Araki, Tokyo (Japan); Tomoyoshi Sugawara, Tokyo (Japan); and Norito Fujita, Tokyo (Japan) | ||
| Assigned to NEC Corporation, Tokyo (Japan) | ||
| Appl. No. 11/575,123 PCT Filed Aug. 29, 2005, PCT No. PCT/JP2005/015644 § 371(c)(1), (2), (4) Date Mar. 12, 2007, PCT Pub. No. WO2006/030623, PCT Pub. Date Mar. 23, 2006. |
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| Claims priority of application No. 2004-269817 (JP), filed on Sep. 16, 2004. | ||
| Prior Publication US 2008/0034112 A1, Feb. 07, 2008 | ||
| Int. Cl. G06F 15/173 (2006.01) | ||
| U.S. Cl. 709—239 [709/238; 370/216; 370/217] | 6 Claims |
| 1. A method of switching between network connection devices provided in a network system, the network system including: a
plurality of devices to be switched connected to each other through a network; a plurality of pseudo redundant configuration
setting means, each of which or several of which are connected respectively to one device to be switched and which perform
a communication using a redundancy protocol with respective devices to be switched; and association control means connected
to the plurality of pseudo redundant configuration setting means, wherein
when at least one of the plurality of devices to be switched is being in a standby state and this standby state needs to be
maintained, the pseudo redundant configuration setting means connected at least to one device to be switched issues a signal
for maintaining a standby state to the device to be switched being in a standby state,
when the plurality of devices to be switched are switched between a standby state and operating state, the association control
means transmits a switching instruction for switching between a standby state and operating state to the pseudo redundant
configuration setting means connected to the device to be switched being in a standby state and pseudo redundant configuration
setting means connected to the device to be switched being in an operating state,
the pseudo redundant configuration setting means connected to the device to be switched being in a standby state transmits,
in response to the switching instruction, information for switching to an operating state to the device to be switched being
in a standby state, and
the pseudo redundant configuration setting means connected to the device to be switched being in an operating state transmits,
in response to the switching instruction, information for switching to a standby state to the device to be switched being
in an operating state.
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