Network monitoring device, network monitoring method, and network monitoring program

摘要

Information on a communication relation or communication path to be monitored is automatically generated to reduce load of a user. A path information generation part receives a destination IP address designated by a user, through an input receiving part. When the input of the destination IP address is received, the path information generation part uses configuration information tables, each of which stores configuration information of a device on a network, to identify IP addresses of networks each having a plurality of terminals, as branch IP addresses. The path information generation part uses the configuration information tables and transfer destination information tables each storing a routing table of a router, to identify the connection order of routers between the designated destination IP address and the identified branch IP addresses, to generate path information.

主权项

1. A network monitoring device that monitors a state of a network having a plurality of terminals and network devices, the network monitoring device comprising:
a storage, the storage storing: configuration information that includes interface address information identifying an interface address of a communication interface and a subnet mask length of the interface address, for each of the terminals and the network devices, and transfer destination information, held by each of the network devices, including information destination address information which identifies a destination address and a subnet mask length of the destination address and transfer destination address information which identifies a transfer destination address to which the destination address is to be transferred in an associated manner; an input device receiving designated destination address information that includes a designated destination address as an object of path information generation and a subnet mask length of the designated destination address; a processor; a computer program which causes the processor to generate path information; a computer-readable non-transitory storage medium having the computer program tangibly embodied thereon, wherein, to generate the path information, the computer program causes the processor to: acquire, from the transfer destination information of each of the network devices and for each piece of the destination address information, a network address of the destination address identified from the destination address information in question as a first address of a plurality of first addresses; then, acquire, from the configuration information of each of the terminals, a network address of the interface address identified from the interface address information as a second address of a plurality of second addresses; then, identify, from among the plurality of first addresses, each address that coincides with an address of the plurality of second addresses as a branch network address, and acquire address information that includes an identified branch network address and a subnet mask length of the identified branch network address as branch network address information; acquire, from the configuration information of each of the network devices, a network address of the interface address identified from the interface address information as a third address of a plurality of third addresses; then, identify, from among the plurality of third addresses, an address coincident with the branch network address identified from the branch network address information; then, identify a network device having the interface address corresponding to the identified address; sequentially and repeatedly perform (a) first processing in which, from the transfer destination information of the identified network device, a transfer destination address to which the designated destination address identified from the designated destination address information should be transferred is acquired; and (b) second processing in which, from the configuration information of each of the network devices, an interface address coincident with the acquired transfer destination address is identified, and a network device having the identified interface address is identified, to then use the transfer destination information of the identified network device in the first processing; store path information that includes information specifying a connection order of network devices between the branch network and the designated designation address is generated and the generated path information in the storage; and monitor a change of a topology in the network, and when a presence of an additional new network is detected, update the path information to include the detected new network.