DATA TRANSFER CONTROL DEVICE AND DATA TRANSFER CONTROL METHOD

摘要

A data transfer control device is provided with a storage configured to store management information that manages a topology of relay devices and a delay of a link between each adjacent relay devices where a link exists, and a processor executing the processing of specifying a main signal path and a detouring path that make an accommodation destination device an exit, allocating an identical label value to the main signal paths while allocating a separate label value different from the label value of the main signal path to the detouring paths respectively, generating a rule for a detouring label value management table, and transmitting the rule to relay devices that are subject to distribution.

主权项

1. A data transfer control device for controlling a data transfer path for relay devices configuring a network system, the data transfer control device comprising:
a storage which stores management information for managing a topology of the relay devices and a delay of a link for each adjacent relay device where the link exists; and a processor which executes a process including:
specifying in accordance with the topology and the delay of the link, a first transfer path for information indicative of a link state including the delay of the link, which is a path with an entry defined by each relay device and an exit defined by an accommodation destination device that is a relay device installed immediately in front of the data transfer control device itself, respectively;specifying in accordance with the topology and the delay of the link, under the assumption that an abnormality occurs at the transfer destination corresponding to the first transfer path, a second transfer path for each first transfer path in which the accommodation destination device is defined as the exit to make a relay device that is a transfer source of the information retransfer the information to a relay device that is different from a transfer destination of the information corresponding to the first transfer path in the case where the abnormality has occurred at the relay device that is the transfer destination of the information corresponding to the first transfer path, respectively;allocating identical path identification information to the first transfer paths;allocating to each second transfer path separate path identification information that is different from the path identification information allocated to the first transfer paths;generating for each relay device that is the transfer source, a first rule including the path identification information allocated to the corresponding second transfer path to be given to the information by the relay device that is the transfer source when an abnormality occurs at the relay device that is the transfer destination corresponding to the first transfer path; andtransmitting the generated first rule to the corresponding relay device.