3com Corporation

Andrew Hunter Gray

David James Stevenson

Robert Duncan

Alastair Hugh Chisholm

Colin Tinto

Vanessa Serra

Christopher Robert Linzell

Hamish Donald Stuart Martin

Neil William Gray

Ronan Fran&ccedil;ois Daniel Grandin

A network management apparatus and method processes network management data received during the monitoring of a network and generates events for presentation in an event list to a user when certain event conditions are detected. Network management data received in relation to an event condition is processed to determine whether it represents a recurring event condition. A recurring event condition is determined if a predetermined number of equivalent events have been generated, and appear in the event list, in an immediately preceding time period. In the described embodiment, if a recurring event condition occurs, a recurring event is generated, and subsequent occurrences of the event condition are not included in the event list presented to the user.

Apparatus and method for processing data relating to events on a network

A method for fetching sparsely indexed MIB tables for a managed network device using an approximation operation, such as a GetNext SNMP operation, comprises sending a plurality of operations in a first data packet at least one of the plurality of approximation operations specifying a speculative approximation. By using speculative approximations of index values of data to be fetched, it is possible to retrieve MIB table data more quickly and efficiently.

Method and apparatus for fetching sparsely indexed MIB tables in managed network systems

A system and method for providing a stress value representing the performance of a network comprising network devices is described. A raw data value for a monitored characteristic of a network device or link is obtained by the management system and compared with a predetermined threshold value for the monitored characteristic. If the raw data value is greater than or equal to said threshold value, the management system provides a stress value equal to a default value, said default value being a maximum or minimum value of a predefined bounded range; and if the raw value is less than said threshold value, the management system calculates a stress value within said predefined bounded range using an appropriate algorithm for said monitored characteristic.

Management system and method for monitoring stress in a network

A network management apparatus and method for determining an optimum threshold value for a monitored characteristic of a network is described. The optimum threshold value is determined by counting a number of previously received events generated from values for a monitored characteristic which were above or below an existing threshold value for the monitored characteristic, and determining the optimum threshold value in dependence on the counted number. An optimum threshold value is provided, which is tailored to suit the network concerned.

Growing community of inventors

West Lothian, United Kingdom

Andrew Hunter Gray