Scheduling method for executing job, scheduling apparatus...

Details Scheduling method for executing job, scheduling apparatus... Scheduling method for executing job, scheduling apparatus...

2011-03-22

2011-03-22

Ahmed, Salman (Department: 2476)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S401000

Reexamination Certificate

active

07911941

ABSTRACT:
A router interposed between a subnet and a backbone network, where the subnet includes a plurality of layer2switches and a plurality of terminals. The terminals communicate with each other via the layer2switches and a master router, wherein the router connects to the master router, the subnet and the backbone network, and originally operates as a backup router, but can be transitioned to operate as a redundant master router. The router includes a severance detection unit for detecting severance between the layer2switches and a redundant function control unit which, when severance has been detected: (i) resumes interrupted communication between the backbone network and the subnet via the router, (ii) receives, from the master router, a copy of an address resolution protocol (ARP) table, and stores the copy of the ARP table in the router, and (iii) transitions the router into a redundant master router.

REFERENCES:
patent: A 2002-232448 (2002-08-01), None
patent: A 2005-192027 (2005-07-01), None

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