NETWORK STRUCTURE INFORMATION ACQUIRING METHOD AND DEVICE
First Claim
1. A network structure information acquiring method for acquiring information about connection relationships in a network formed with a plurality of network devices, the connection relationships being represented by a tree structure having a predetermined network device as a root node,the method comprising:
- a step of acquiring information about ports held by each of the network devices, and network devices connected to each of the ports, from each of the network devices; and
a step of analyzing structures in the network, by determining connection relationships in the network based on a fact that an arbitrary partial tree in the tree structure is smaller than an upstream partial tree containing the arbitrary partial tree.
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Accused Products
Abstract
A method for acquiring information about connection relationships in a network as a tree structure having a predetermined network device as a root node, includes the steps of acquiring information about the ports held by each of the network devices, and the network devices connected to each of the ports from each of the network devices; and determining connection relationships in the network, based on the fact that an arbitrary partial tree in the tree structure is smaller than an upstream partial tree containing the arbitrary partial tree.
3 Citations
20 Claims
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1. A network structure information acquiring method for acquiring information about connection relationships in a network formed with a plurality of network devices, the connection relationships being represented by a tree structure having a predetermined network device as a root node,
the method comprising: -
a step of acquiring information about ports held by each of the network devices, and network devices connected to each of the ports, from each of the network devices; and a step of analyzing structures in the network, by determining connection relationships in the network based on a fact that an arbitrary partial tree in the tree structure is smaller than an upstream partial tree containing the arbitrary partial tree. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A network structure information acquiring method for acquiring information about connection relationships in a network formed with a plurality of L2 switches functioning as SNMP agents, the connection relationships being represented by a tree structure having a predetermined L2 switch as a root node,
the method comprising: -
a step of acquiring port information, by performing communications with the L2 switches by SNMP, acquiring MAC addresses of ports of the L2 switches and all the L2 switches connected directly to the respective ports or indirectly to the respective ports via the other L2 switches, and storing the MAC addresses into a port information table; a step of determining the L2 switch having the largest number of L2 switches connected to downstream ports as the root node having a connection relationship first determined among the L2 switches, when ports to which a SNMP manager is connected are defined as upstream ports, and the other ports are defined as downstream ports among the respective L2 switches; and a step of analyzing structures in the network, by determining connection relationships of the L2 switch having the largest number of downstream devices as the L2 switch connected directly to a downstream port of the L2 switch having a connection relationship determined, among the L2 switches connected to the downstream ports of the L2 switch having the connection relationship determined.
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9. A network structure information acquiring method for acquiring information about connection relationships in a network formed with a plurality of L2 switches functioning as SNMP agents, the connection relationships being represented by a tree structure having a predetermined L2 switch as a root node,
the method comprising: -
a step of acquiring port information, by performing communications with the L2 switches by SNMP, acquiring MAC addresses of ports of the L2 switches and all the L2 switches connected directly to the respective ports or indirectly to the respective ports via the other L2 switches, and storing the MAC addresses into a port information table; a step of determining the L2 switches having no downstream ports as edge nodes among the L2 switches, when ports to which a SNMP manager is connected are defined as upstream ports, and the other ports are defined as downstream ports among the respective L2 switches; and a step of analyzing structures in the network, by determining connection relationships by successively identifying L2 switches connected directly to downstream ports of the L2 switches other than the edge nodes with reference to the port information table, starting from a network device having the smallest number of downstream devices.
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10. A network structure information acquiring device that acquires information about connection relationships in a network formed with a plurality of network devices, the connection relationships being represented by a tree structure having a predetermined network device as a root node,
the network structure information acquiring device comprising: -
a port information acquiring unit that acquires information about ports held by each of the network devices, and network devices connected to each of the ports, from each of the network devices; and a network structure analyzing unit that determines connection relationships in the network, based on a fact that an arbitrary partial tree in the tree structure is smaller than an upstream partial tree containing the arbitrary partial tree. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A network structure information acquiring device that acquires information about connection relationships in a network formed with a plurality of L2 switches functioning as SNMP agents, the connection relationships being represented by a tree structure having a predetermined L2 switch as a root node,
the network structure information acquiring device comprising: -
a port information acquiring unit that performs communications with the L2 switches by SNMP, acquires MAC addresses of ports of the L2 switches and all the L2 switches connected directly to the respective ports or indirectly to the respective ports via the other L2 switches, and stores the MAC addresses into a port information table; and a network structure analyzing unit that determines the L2 switch having the largest number of L2 switches connected to downstream ports to be the root node having a connection relationship first determined among the L2 switches, when ports to which the network structure information acquiring device is connected are defined as upstream ports, and the other ports are defined as downstream ports among the respective L2 switches, and determines connection relationships by determining the L2 switch having the largest number of downstream devices to be the L2 switch connected directly to a downstream port of the L2 switch having a connection relationship determined, among the L2 switches connected to the downstream ports of the L2 switch having the connection relationship determined.
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18. A network structure information acquiring device that acquires information about connection relationships in a network formed with a plurality of L2 switches functioning as SNMP agents, the connection relationships being represented by a tree structure having a predetermined L2 switch as a root node,
the network structure information acquiring device comprising: -
a port information acquiring unit that performs communications with the L2 switches by SNMP, acquires MAC addresses of ports of the L2 switches and all the L2 switches connected directly to the respective ports or indirectly to the respective ports via the other L2 switches, and stores the MAC addresses into a port information table; and a network structure analyzing unit that determines the L2 switches not having downstream ports to be edge nodes among the L2 switches, when ports to which the network structure information acquiring device is connected are defined as upstream ports, and the other ports are defined as downstream ports among the respective L2 switches, and determines connection relationships by successively identifying L2 switches connected directly to downstream ports of the L2 switches other than the edge nodes with reference to the port information table, starting from a network device having the smallest number of downstream devices.
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19. A network structure information acquiring program implemented in a management terminal for acquiring information about connection relationships in a network formed with a plurality of network devices, the connection relationships being represented by a tree structure having a predetermined network device as a root node,
the network structure information acquiring program causing the management terminal to: -
acquire information about ports held by each of the network devices, and network devices connected to each of the ports, from each of the network devices; and determine connection relationships in the network, based on a fact that an arbitrary partial tree in the tree structure is smaller than an upstream partial tree containing the arbitrary partial tree. - View Dependent Claims (20)
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Specification