Network fault analysis tool

• US 6,823,479 B1
• Filed: 02/14/2000
• Issued: 11/23/2004
• Est. Priority Date: 02/14/2000
• Status: Expired due to Fees

• Current Assignee: Teradyne Incorporated
• Original Assignee: Teradyne Incorporated
• Inventors: Schmidt, Peter H., Kaffine, David, Minckler, William, McElhaney, Robert E. Jr., Hughes, Anthony C., Agrawal, Neelesh
• Primary Examiner(s): Beausoliel, Robert
• Assistant Examiner(s): MCCARTHY, CHRISTOPHER S
• Application Number:
  US09/503,352
• Time in Patent Office: 1,744 Days
• Field of Search: 714/43, 714/4, 714/712, 709/224
• US Class Current: 714/43
• CPC Class Codes: H04L 41/0631 using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
• CPC Class Codes: H04L 43/50 Testing arrangements

Abstract

A testing tool for Internet Service Provider (ISP) network engineers which is used to diagnose network faults, characterize network performance and evaluate new equipment and software releases. The tool can be used to schedule and run proactive tests to identify network problems before subscribers are affected. Further, the tool can be used to provide testing on demand to quickly isolate the root cause of a problem identified by the tool or by network management systems or subscribers. The tool is topology independent and thus does not have to be reconfigured as the network changes. The tool only sends traffic as directed by the network engineer and thus does not generate undesirable heavy network traffic loads, unless such a heavy network loads are desired by the network engineer.

Claims

1. A tool comprising:

a processor capable of being coupled to a data network;

processor-readable storage for storing instructions and data for causing the processor to perform testing on said data network;

wherein said instructions and data include at least one protocol stack; and

wherein said protocol stack allows bit-level and individual state transition level control over protocols.

2. The tool of claim 1 wherein said instructions and data include commands for scheduling proactive testing to identify problems before subscribers of said data network are affected.

3. The tool of claim 1 wherein said instructions and data include commands for performing testing on demand of said data network to isolate root causes of symptoms identified by at least one of said tool, said subscribers, and a network management system.

4. The tool of claim 1 wherein said data and instructions further includes a test application library having a multisize packet pinger.

5. The tool of claim 4 wherein said test application library comprises scripts using multiple test functions.

6. The tool of claim 1 wherein testing protocols are selected from the group consisting of IP, TCP, UDP, HTTP, ICMP, SMTP, DNS, POP, FTP, RADIUS, HTTPS and PPP.

7. The tool of claim 1 wherein testing comprises ping testing across at least two of the OSI layers two through seven.

8. The tool of claim 1 wherein said processor performs testing of an ISP network.

9. The tool of claim 1 wherein said processor performs testing of web sites accessible by users of said data network.

10. The tool of claim 1 wherein said applications are integrated with an Application Programming Interface (API) of an existing monitoring and management system.

11. A tool comprising:

a processor capable of being coupled to a data network;

processor-readable storage for storing instructions and data for causing the processor to perform at least one of testing said data network, diagnosing a network fault and characterizing network performance of said data network; and

wherein said instructions and data include at least one of protocol stacks, commands for performing protocol-level actions, a test function library, a test application library, a user interface, a command line interface, a custom API, and an administration user interface,

wherein said tool is non topology-dependent of said data network.

12. A computer program product for a Fault Analysis Tool, the computer program product comprising a computer usable medium having computer readable code thereon, including program code comprising:

instructions and data for causing a processor to perform at least one of testing a data network, diagnosing a network fault, and characterizing network performance of a data network;

wherein said computer program product is topology independent of said data network.

13. The computer program product of claim 12 wherein said instructions and data include at least one of protocol stacks, commands for performing protocol-level actions, a test function library, a test application library, a user interface, a command line interface, a custom API, and an administration user interface.

14. The computer program product of claim 13 wherein said protocol stacks allow bit-level and individual state transition level control over protocols.

15. The computer program product of claim 14 wherein testing comprises attempts to connect to a network node at at least two of the OSI layers two through seven.

16. The computer program product of claim 15 wherein said test application library includes a multi-size packet pinger application.

17. The computer program product of claim 13 wherein said test application library includes a multi-size packet pinger application.

18. The computer program product of claim 13 wherein testing protocols are selected from the group consisting of IP, TCP, UDP, HTTP, ICMP, SMTP, DNS, POP, FTP, RADIUS, HTTPS, PPP.

19. The computer program product of claim 13 wherein said test application library comprises scripts using multiple test functions.

20. The computer program product of claim 13 wherein said applications are integrated with an Application Programming Interface (API) of an existing monitoring and management system.

21. The computer program product of claim 12 wherein said instructions and data include commands for scheduling proactive testing to identify problems before subscribers of a data network are affected.

22. The computer program product of claim 12 wherein said instructions and data include commands for performing testing on demand of a data network.

23. The computer program product of claim 12 wherein said data network comprises an ISP network.

24. The computer program product of claim 12 wherein said data network includes web sites accessible by users of said data network.