Network discovery and data transfer using SNMP in an electric power transmission or distribution system

• US 8,565,119 B2
• Filed: 10/13/2009
• Issued: 10/22/2013
• Est. Priority Date: 04/14/2009
• Status: Active Grant

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: August, Jared P., Fodero, Kenneth J., Hilton, Andrew
• Primary Examiner(s): ROBERTS, BRIAN S
• Application Number:
  US12/578,497
• Publication Number:
  US 20100260066A1
• Time in Patent Office: 1,470 Days
• Field of Search: None
• US Class Current: 370/254
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 41/5058 Service discovery by the service manager
• CPC Class Codes: H04L 61/103 across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]

Abstract

Disclosed herein are systems and methods for performing network discovery and file transfer utilizing Simple Network Management Protocol (SNMP). According to one embodiment, a manager queries an agent device to obtain an agent device'"'"'s neighbor address table comprising IP addresses of neighboring devices. IP addresses comprised in the agent device'"'"'s neighbor address table may be added to a network inventory. The manager device may then iteratively query each device in the network inventory until each of the plurality of agent devices have been queried. According to one embodiment, a device may divide a data file into a plurality of sequenced partitions. A plurality of packets may be created containing the sequenced partitions. A receiving device may reconstruct the data file using the sequenced partitions.

Claims

1. A method comprising:

each plurality of agent devices connected by a network querying at least one neighboring agent device using a MAC address of the neighboring agent known to each of the plurality of agent devices to obtain an IP address of at least one neighboring agent device;

each agent device creating a neighbor address table comprising an IP address of the at least one neighboring agent device;

a manager device querying one of the plurality of networked agent devices to obtain the queried agent device'"'"'s neighbor address table;

the queried agent device returning the queried agent device'"'"'s neighbor address table;

the manager device adding each IP address comprised in the queried agent device'"'"'s neighbor address table to a network inventory;

the manager device designating each IP address comprised in the queried agent device'"'"'s neighbor address table as an unqueried agent device;

a discovery process comprising;

the manager device querying an unqueried agent device in the network inventory to obtain the unqueried agent device'"'"'s neighbor address table using Simple Network Management Protocol (SNMP);

the unqueried device returning the unqueried agent device'"'"'s neighbor address table;

designating the unqueried agent device as a queried agent device;

the manager device comparing each IP address comprised in the unqueried agent device'"'"'s neighbor address table to IP addresses comprised in the network inventory and adding each new IP address to the network inventory as an unqueried agent device; and

iteratively repeating the steps of the discovery process until each of the plurality of agent devices in the network inventory is designated as a queried agent device.

2. The method of claim 1, wherein each neighbor address table comprises a Management Information Base (MIB).

3. The method of claim 1, further comprising determining a topology of the plurality of agent devices by associating each agent device with each neighboring agent device according to each agent device'"'"'s neighbor address table.

4. The method of claim 1, wherein at least one of the plurality of agent devices comprises an intelligent electronic device (IED) configured to monitor and control a component in an electrical power distribution system.

5. The method of claim 1, further comprising transferring data to one of the plurality of agent devices comprised in the network inventory, wherein transferring data comprises:

the manager device dividing a data file into a plurality of sequenced partitions;

the manager device creating a plurality of packets, each packet comprising at least one data field corresponding to one of the plurality of sequenced partitions, and an offset corresponding to the order of the data field relative to the plurality of sequenced partitions, such that each of the plurality of sequenced partitions is contained within a data field of one of the plurality of packets;

the manager device transmitting the plurality of packets using Simple Network Management Protocol (SNMP) to one of the plurality of agent devices; and

the one of the plurality of agent devices reconstructing the data file using the offsets and the sequenced partitions contained within the data fields of the plurality of packets.

6. The method of claim 1, further comprising each of the plurality of agent devices connected by the network transmitting a MAC address to neighboring devices via overhead bandwidth in a Synchronized Optical Networking packet.

7. A system for performing network discovery comprising:

a network comprising a plurality of agent devices, each of the plurality of agent devices configured to obtain an IP address of at least one neighboring agent device using a MAC address of the at least one neighboring agent and to create a neighbor address table comprising an IP address of the at least one neighboring agent device;

a manager device comprising;

a processor, and a computer-readable storage medium in electrical communication with the processor and comprising computer instructions executable on the processor for performing a method of;

querying one of the plurality of networked agent devices to obtain the queried agent device'"'"'s neighbor address table;

receiving the queried agent device'"'"'s neighbor address table;

adding IP addresses comprised in the queried agent device'"'"'s neighbor address table to a network inventory;

designating each IP address comprised in the queried agent device'"'"'s neighbor address table as an unqueried agent device;

a discovery process comprising;

querying an unqueried agent device in the network inventory to obtain the unqueried agent device'"'"'s neighbor address table using Simple Network Management Protocol (SNMP);

receiving the unqueried agent device'"'"'s neighbor address table;

designating the unqueried agent device as a queried agent device;

comparing each IP address comprised in the unqueried agent device'"'"'s neighbor address table IP addresses comprised in the network inventory and adding each new IP address to the network inventory as an unqueried agent device; and

iteratively repeating the steps of the discovery process until each of the plurality of agent device in the network inventory is designated as a queried agent device.

8. The system of claim 7, wherein each address table comprises a Management Information Base (MIB).

9. The system of claim 7, wherein the method further comprises determining a topology of the plurality of agent devices by associating each agent device with each neighboring agent device according to each agent device'"'"'s neighbor address table.

10. The system of claim 7, wherein at least one of the plurality of agent devices comprises an intelligent electronic device (IED) configured to monitor and control a component in an electrical power distribution system.

11. The system of claim 7, wherein the plurality of agent devices communicate via Synchronized Optical Networking (SONET), and wherein the method further comprises each of the plurality of agent devices connected by the network transmitting a MAC address to neighboring devices via overhead bandwidth in a SONET packet.

12. The system of claim 7, wherein the method further comprises transferring data to one of the plurality of agent devices comprised in the network inventory, and wherein transferring data comprises:

the manager device dividing a data file into a plurality of sequenced partitions;

the manager device creating a plurality of packets, each packet comprising,

at least one data field corresponding to one of the plurality of sequenced partitions, and

an offset corresponding to the order of the data field relative to the plurality of sequenced partitions, such that each of the plurality of sequenced partitions is contained within a data field of one of the plurality of packets;

the manager device transmitting the plurality of packets using Simple Network Management Protocol (SNMP) to one of the plurality of agent devices;

the one of the plurality of agent devices reconstructing the data file using the offsets and the sequenced partitions contained within the data fields of the plurality of packets.

13. An intelligent electronic device (IED) comprising:

a Simple Network Management Protocol (SNMP) network interface;

a processor in communication with the SNMP network interface;

a computer-readable storage medium in electrical communication with the processor and comprising computer instructions executable on the processor for performing a method of;

querying at least one neighboring agent device using a MAC address of the at least one neighboring agent device to obtain an IP address of at least one neighboring agent device;

creating a neighbor address table comprising an IP address of the at least one neighboring agent device;

receiving a query to obtain the neighbor address table via the SNMP network interface; and

returning the neighbor address table via the SNMP network interface in response to the query.

14. The IED of claim 13, wherein the IED is further configured to monitor and control a component in an electrical power distribution system.

15. The IED of claim 14, wherein the IED is configured to receive a configuration instruction via the SNMP network interface and to implement the configuration instruction by controlling the component in the electrical power distribution system.