Systems and methods for isolating faults in computer networks

• US 7,103,807 B2
• Filed: 11/05/2002
• Issued: 09/05/2006
• Est. Priority Date: 05/05/2000
• Status: Expired due to Term

• Current Assignee: Computer Associates Think Inc. (Broadcom, Inc.)
• Original Assignee: Computer Associates Think Inc. (Broadcom, Inc.)
• Inventors: Ball, Scott, Greenwald, Joseph, Bosa, Patrick A., Buia, Christopher, Pantelis, Thomas S.
• Primary Examiner(s): Bonzo, Bryce P.
• Assistant Examiner(s): LOHN, JOSHUA A
• Application Number:
  US10/287,974
• Publication Number:
  US 20030051195A1
• Time in Patent Office: 1,400 Days
• Field of Search: 714/43
• US Class Current: 714/43
• CPC Class Codes: H04L 41/0618 based on the physical or logical position
• CPC Class Codes: H04L 41/0893 Assignment of logical groups to network elements
• CPC Class Codes: H04L 41/0894 Policy-based network configuration management
• CPC Class Codes: H04L 45/04 Interdomain routing, e.g. hierarchical routing
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06

Abstract

A system or a method is designed to detect and suppress faults on network elements located in various logical groups. The system and method of fault status suppression in a communications network includes receiving fault data from a detector identifying fault status of a network element; mapping logical group of the detector and the network element; and suppressing fault on the network element when the detector and the network element are in different logical groups and there is a fault on a device providing communication between the logical groups.

Claims

1. A method of fault status suppression in a communication network, wherein the communication network includes a plurality of network elements, wherein the communication network is organized into a plurality of logical groups, wherein each of the plurality of logical groups includes one or more of the plurality of network elements, wherein one or more of the plurality of network elements in one of the plurality of logical groups is virtually partitioned from at least one network element in another of the plurality of logical groups, wherein at least one of the plurality of logical groups includes a detector for receiving fault data, the method comprising:

receiving fault data from the detector identifying a fault status of a first network element;

determining a first logical group from among the plurality of logical groups for said detector and a second logical group from among the plurality of logical groups for said first network element; and

suppressing a fault on said first network element when the first logical group of said detector and the second logical group of said first network element are different and there is a fault on a second network element providing a communication path between said first and second logical groups.

2. The method of claim 1 wherein said detector is a polling system.

3. The method of claim 1 wherein the second network element includes a network transit element.

4. The method of claim 3 wherein said network transit element includes a router.

5. The method of claim 1 wherein the plurality of logical groups include virtual local area networks.

6. The method of claim 1 wherein the plurality of logical groups include virtual private networks.

7. A system for fault status suppression in a communication network, wherein the communication network includes a plurality of network elements, wherein the communication network is organized into a plurality of logical groups, wherein each of the plurality of logical groups includes one or more of the plurality of network elements, wherein one or more of the plurality of network elements in one of the plurality of logical groups is virtually partitioned from at least one network element in another of the plurality of logical groups, wherein at least one of the plurality of logical groups includes a detector for receiving fault data, the system comprising:

means for receiving fault data from the detector identifying fault status of a first network element;

means for determining a first logical group from among the plurality of logical groups for said detector and a second logical group from among the plurality of logical groups for said first network element; and

means for suppressing fault on said first network element when the first logical group of said detector and the second logical group of said first network element are different and there is a fault on a second network element providing communication between said first and second logical groups.

8. A system for fault status suppression in a communication network, wherein the communication network includes a plurality of network elements, wherein the communication network is organized into a plurality of logical groups, wherein each of the plurality of logical groups includes one or more of the plurality of network elements, wherein one or more of the plurality of network elements in one of the plurality of logical groups is virtually partitioned from at least one network element in another of the plurality of logical groups, the system comprising:

a detector that is included in at least one of the plurality of logical groups, said detector being constructed and arranged to identify a fault status of a first network element;

a mapper constructed and arranged to determine a first logical group from among the plurality of logical groups for said detector and a second logical group from among the plurality of logical groups for said first network element; and

a fault status suppressor constructed and arranged to suppress a fault on said first network element when the first logical group of said detector and the second logical group of said first network element are different and there is a fault on a second network element providing communication between said first and second logical groups.

9. The system of claim 8 wherein said detector is a polling system.

10. The system of claim 8 wherein the second network element includes a network transit element.

11. The system of claim 10 wherein said network transit element includes a router.

12. The system of claim 8 wherein the plurality of logical groups include virtual local area networks.

13. The system of claim 8 wherein the plurality of logical groups include virtual private networks.

14. The system of claim 8 wherein said mapper is associated with a network management system.

15. A method of fault status suppression in a communication network, wherein the communication network includes a plurality of network elements, wherein the communication network is organized into a plurality of logical groups, wherein each of the plurality of logical groups includes one or more of the plurality of network elements, wherein one or more of the plurality of network elements in one of the plurality of logical groups is virtually partitioned from at least one network element in another of the plurality of logical groups, wherein at least one of the plurality of logical groups includes a detector for receiving fault data, the method comprising:

receiving fault data from the detector identifying a fault status of a first network element;

determining a first logical group of said detector from among the plurality of logical groups;

determining a second logical group of said first network element from among the plurality of logical groups; and

suppressing a fault on said first network element when said first logical group of said detector and second said logical group of said first network element are different from one another and there is a fault on a second network element providing a communication path between said first logical group of said detector and said second logical group of said first network element.