Scheduling method for executing job, scheduling apparatus for executing job, and commutative recording medium having recorded thereon scheduling program for causing execution of job

Abstract

A router interposed between a subnet and a backbone network, where the subnet includes a plurality of layerswitches and a plurality of terminals. The terminals communicate with each other via the layerswitches 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 layerswitches 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.