Method and system for video network discovery

• US 7,792,949 B2
• Filed: 08/02/2002
• Issued: 09/07/2010
• Est. Priority Date: 12/28/2001
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Tandberg Telecom AS (Cisco Systems, Inc.)
• Inventors: Tewari, Jayanta, Desai, Nainesh
• Primary Examiner(s): Burgess; Barbara N
• Application Number:
  US10/210,918
• Publication Number:
  US 20030126617A1
• Time in Patent Office: 2,958 Days
• Field of Search: 725/119, 725/127, 711/147, 710/104, 710/305, 726/2, 726/22, 726/25, 726/27, 370/223, 370/254, 370/255, 370/328, 370/338, 370/392, 370/260, 370/401, 713/176, 709/217, 709/219, 709/220, 709/223, 709/224
• US Class Current: 709/224
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04N 7/152 Multipoint control units therefor

Abstract

Network device discovery method and system performs network device discovery in a more efficient manner by retrieving information from a registration network device about other network devices and then using the retrieved information to select discovery tests to discover the configuration of the other network devices in a more efficient manner. For instance, video network device discovery process identifies a gatekeeper and retrieves the registration list of video devices from the gatekeeper. The video devices on the gatekeeper registration list are then queried with selected discovery tests to determine network configuration for the devices, such as device type, without having to use unnecessary discovery tests associated with the discovery of other types of network devices.

Claims

1. A system that discovers devices in a network, comprising:

a network management station that includes;

a discovery engine configured to execute the following functions in the order recited;

initiate a device discovery process in a network;

determine that a device in the network is a gatekeeper, which is configured to maintain data transmission compatibility for video devices, accept endpoint registrations, translate names to internet protocol addresses, and govern calls to manage bandwidth;

in response to a determination that the device in the network is a gatekeeper, automatically retrieve a list of network devices registered with the gatekeeper from the gatekeeper;

determine types of devices included on the list retrieved from the gatekeeper;

dynamically select a subset of one or more discovery tests from a plurality of available discovery tests to discover a configuration of the types of devices on the list, said subset of one or more discovery tests only including the discovery test or tests that are associated with the types of devices on the list retrieved from the gatekeeper, and eliminate an unnecessary discovery test or tests that correspond with devices not on the list, and

perform the subset of discovery tests associated with the types of devices on the list retrieved from the gatekeeper to identify the configuration of devices on the list.

2. The system of claim 1, wherein the list of network devices includes a second gatekeeper, and the discovery engine is further configured to

automatically retrieve information pertaining to network devices associated with the second gatekeeper from the second gatekeeper, and

optimize a process of discovering characteristics of the devices associated with the second gatekeeper by selecting a discovery test to be applied to at least one such device based on information retrieved from the second gatekeeper.

3. The system of claim 1, wherein some devices on the network comprise video devices.

4. The system of claim 1, wherein some devices on the network comprise network devices configured to perform video conferencing functions.

5. The system of claim 1, wherein a non-selected discovery test is a router filter test.

6. The system of claim 1, wherein a non-selected discovery test is a switch filter test.

7. A method for discovering devices in a network executed by a network management station, the method comprising steps performed in the following order:

initiating, at the network management station, a device discovery process in a network;

determining, at the network management station, that a device in the network is a gatekeeper, which is configured to maintain data transmission compatibility for video devices, accept endpoint registrations, translate names to internet protocol addresses, and govern calls to manage bandwidth;

in response to determining that the device in the network is a gatekeeper, automatically retrieving, at the network management station, a list of network devices registered with the gatekeeper from the gatekeeper;

determining, at the network management station, types of devices included on the list retrieved from the gatekeeper;

dynamically selecting, at the network management station, a subset of one or more discovery tests from a plurality of available discovery tests to discover a configuration of the types of devices on the list, said subset of one or more discovery tests only including the discovery test or tests that are associated with the types of devices on the list retrieved from the gatekeeper, and eliminating an unnecessary discovery test or tests that correspond with, devices not on the list; and

performing, at the network management station, the subset of discovery tests associated with the types of devices on the list retrieved from the gatekeeper to identify the configuration of devices on the list.

8. The method of claim 7, wherein the list of network devices includes a second gatekeeper, and the method further comprises:

automatically retrieving information pertaining to network devices associated with the second gatekeeper from the second gatekeeper; and

optimizing a process of discovering characteristics of the devices associated with the second gatekeeper by selecting a discovery test to be applied to at least one such device based on information retrieved from the second gatekeeper.

9. The method of claim 7, wherein at least one device on the network is a video endpoint.

10. The method of claim 7, wherein at least one device on the network is a video MCU device.

11. The method of claim 7, wherein at least one device on the network is a video gateway device.

12. The method of claim 7, wherein at least one device on the network is a network device that performs the function of a video device with Internet Protocol.

13. The method of claim 12, wherein the network device comprises a server having a module that performs video MCU device functionality.