System and method for monitoring state information in a network

• US 20040010584A1
• Filed: 07/15/2002
• Published: 01/15/2004
• Est. Priority Date: 07/15/2002
• Status: Abandoned Application

• Current Assignee: Catbird Networks, Inc.
• Original Assignee: Catbird Networks, Inc.
• Inventors: Storch, Randy S., Peterson, Alec H.
• Application Number:
  US10/194,071
• Publication Number:
  US 20040010584A1
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 41/046 comprising network management agents or mobile agents therefor
• CPC Class Codes: H04L 41/0686 Additional information in the notification, e.g. enhancement of specific meta-data
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 63/1433 Vulnerability analysis
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

Agents are instructed execute network tests during monitoring intervals. Results of the tests are stored. After expiration of a dampening window period the results are retrieved and evaluated. The evaluation is used to update an error state stored in a data structure in a database as required. Notification of detected errors is provided if certain notification dampening criteria are satisfied.

Claims

1. A system for maintaining and reporting an error state corresponding to agent testing of a computer network, comprising;

one or more agents to execute a test of the computer network;

an error data structure associated with each agent for storing an error state associated with the test performed by the agent associated with the error data structure;

an initiator to initiate the test;

an evaluation engine to evaluate result messages returned by the one or more agents after the one or more agents execute the test in the context of the error data structure associated with each agent, wherein the evaluation engine waits until expiration of a dampening window prior to evaluating the result messages and updates the error data structure associated with each agent in accordance with the result messages returned by the one or more agents;

a database for storing the current state; and

a notification system to notify a user of a detected error.

2. The system recited in claim 1, wherein the error data structure associated with a particular agent is stored as an update to the database only if the error state represented by the error data structure associated with the agent has changed.

3. The system recited in claim 1, wherein the system is implemented on a centralized server.

4. The system recited in claim 1, wherein the system is implemented on a plurality of distributed servers.

5. The system recited in claim 1, wherein the test is a TLD name server test.

6. The system recited in claim 1, wherein the error data structure is an eight-bit data structure.

7. The system recited in claim 1, wherein the error data structure comprises an indication of whether the detected error existed in a preceding dampening window.

8. The system recited in claim 1, wherein the error data structure comprises an indication of whether the detected error is new to a current dampening window.

9. The system recited in claim 1, wherein the error data structure comprises an indication of whether the detected error is detected a plurality of times in a current dampening window.

10. The system recited in claim 1, wherein the error data structure comprises an indication of whether the detected error was corrected.

11. The system recited in claim 1, wherein the error data structure comprises an indication of whether the detected error has been reported through a notification system.

12. The system recited in claim 1, wherein the notification system notifies the user only upon expiration of a notification dampening window.

13. The system recited in claim 12, wherein the notification system notifies the user only if a pre-determined number of agents detect the detected error.

14. The system recited in claim 12, wherein the notification system notifies the user only if the detected error persists for longer than a pre-determined duration.

15. The system recited in claim 12, wherein the pre-determined duration is a number of dampening window time periods.

16. The system recited in claim 1, wherein a plurality of tests are performed by one or more of the one or more agents and separate error data structures are maintained for each of the tests performed by the one or more agents.

17. A method for maintaining and reporting an error state corresponding to agent testing of a computer network, the method comprising the steps of:

(a) conducting a test of the computer network;

(b) receiving a result message from conducting the test;

(c) storing the result in a database; and

(d) determining if a dampening window has expired;

if the dampening window has expired;

(e) loading the stored result from the database;

(f) evaluating the result;

(g) determining if a current error state has changed into a new error state; and

if the current error state has changed;

(h) notifying a user of the new error state.

18. The method recited in claim 17, further comprising the step of determining whether an error condition or error correction exists in the new error state, and notifying a user of the error condition or error correction.

19. The method recited in claim 17, further comprising the steps of:

determining if notification dampening criteria have been satisfied; and

notifying the user only if the notification dampening criteria have been satisfied.

20. The method recited in claim 19, further comprising the step of determining whether a pre-determined number of agents detected an error.

21. The method recited in claim 19, further comprising the step of determining whether an error has persisted for longer than a predetermined period of time.

22. The method recited in claim 18, further comprising the steps of:

determining if notification dampening criteria have been satisfied; and

notifying the user only if the notification dampening criteria have been satisfied.

23. The method recited in claim 22, further comprising the step of determining whether a pre-determined number of agents detected an error.

24. The method recited in claim 22, further comprising the step of determining whether an error has persisted for longer than a pre-determined period of time.

25. The method recited in claim 17, further comprising the step of loading the stored result into a random access memory.

26. The method recited in claim 17, further comprising the step of performing a TLD name server test.

27. The method recited in claim 17, further comprising the step of storing the current and new error states as error data structures.

28. The method recited in claim 27, wherein the error data structures are eight-bit data structures.