Netiq Corporation

Jeffrey Todd Hicks

Steven Thomas Joyce

John Lee Wood

Peter James Schwaller

Mark Clarence Zelek

Dana Borger

Joan Marie Bellinghausen

Christopher David Selvaggi

Mark Eric McCorry

Michael Tod Schumacher

Edward Adams Robie, Jr

Gary Michael Weichinger

A system, method, and computer-readable medium for performing network system diagnostics is provided. The method includes obtaining a respective identification of a first target device and a second target device deployed in a network; iteratively querying neighbor devices of at least one node in a communications path between the first and second target devices, wherein the neighbor devices and the first and second target device may comprise heterogeneous network nodes; and generating a layer 2 path trace that comprises identification of network devices interconnected on a physical path between the first and second target devices. A computer-readable medium includes instructions for execution by a processing system, wherein the instructions are configured to perform the foregoing method. A system includes a data processing system including a processor device for executing a diagnostics engine implemented as a set of computer-executable instructions configured to perform the foregoing method.

System, method, and computer-readable medium for determining a layer 2 path trace in a heterogeneous network system

Methods, systems and computer program products are provided for synchronizing clocks in a computer network. A first node clock is synchronized to a second node clock by establishing an initial value of a virtual second node clock at the first node. The initial value may be established based on the first node clock and a timing record received from the second node. A frequency bias adjustment factor is determined for the virtual second node clock based on a plurality of clock requests from the first node and a plurality of corresponding responses from the second node spaced apart in time. The responses from the second node include the timing record based on the second node clock. A time of the virtual second node clock is provided based on the frequency bias adjustment factor responsive to requests for the virtual second node clock at a time between requests.

Methods, systems and computer program products for synchronizing clocks of nodes on a computer network

Methods, systems and computer program products are provided for evaluating performance of a network that supports packetized communications. A network test protocol that is associated with the packetized communication is initiated and network performance data is obtained based on the initiated network test protocol. An overall network quality rating is generated based on the obtained performance data and a network impairment indicator is calculated based on the overall network quality rating.

Methods, systems and computer program products for assessing network quality

Methods, systems and computer program products for testing the performance of a communication network including a plurality of endpoint nodes executing application programs which utilize the communications network are provided. A console node is provided on the network which may initiate operations by test agents executing on one or more of the plurality of endpoint nodes. The agents may generate network performance information using passive application monitoring and/or active endpoint pair based network testing responsive to scheduling instructions from the console node. Specific application programs may be designated for passive monitoring and active test protocols may be provided based on an expected type of application communication traffic. In another aspect of the present invention, one of a plurality of types of transaction models defining the beginning and ending reference point for a transaction timing measurement may be provided to the endpoint nodes for use in passive application monitoring. In a further aspect of the present invention, the endpoint nodes may be automatically discovered by the console node.

Methods, systems and computer program products for network performance testing through active endpoint pair based testing and passive application monitoring

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Cary, NC, United States of America

Jeffrey Todd Hicks