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Recognizing and processing conflicts in network management policies

Patent 6327618 Issued on December 4, 2001. Estimated Expiration Date: Icon_subject December 3, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Network policy implementation system for performing network control operations in response to changes in network state
Patent #: 5557747
Issued on: 09/17/1996
Inventor: Rogers, et al.

System and method for implementing a hierarchical policy for computer system administration
Patent #: 5797128
Issued on: 08/18/1998
Inventor: Birnbaum

Method and apparatus for defining and enforcing policies for configuration management in communications networks
Patent #: 5872928
Issued on: 02/16/1999
Inventor: Lewis, et al.

Policy management and conflict resolution in computer networks
Patent #: 5889953
Issued on: 03/30/1999
Inventor: Thebaut, et al.

Method and apparatus for automatically updating software components on end systems over a network
Patent #: 6009274
Issued on: 12/28/1999
Inventor: Fletcher, et al.

Distributed system and method for controlling access control to network resources
Patent #: 6064656
Issued on: 05/16/2000
Inventor: Angal, et al.

Method and apparatus for defining and implementing high-level quality of service policies in computer networks Patent #: 6167445
Issued on: 12/26/2000
Inventor: Gai, et al.

Inventors

Application

No. 205831 filed on 12/03/1998

US Classes:

709/223, COMPUTER NETWORK MANAGING370/254, NETWORK CONFIGURATION DETERMINATION707/5, Query augmenting and refining (e.g., inexact access)709/221, Reconfiguring709/222Initializing

Examiners

Primary: Sheikh, Ayaz R.
Assistant: Jean, Frantz B.

Attorney, Agent or Firm

International Class

G06F 015/173

Abstract

A method and apparatus are provided for recognizing and processing conflicts in policies that govern a policy-based system. The method and apparatus may be implemented as a policy verifier that acts upon one or more policies. Each policy is formally defined and comprises a condition and a consequent, each of which are further formally defined in terms of component elements. A conflict among two or more policies is formally defined to occur when the condition of a first policy and the condition of a second policy may be simultaneously true, and when the consequent of the first policy and the consequent of the second policy may not be carried out simultaneously. When a policy conflict is detected, the conflict is resolved by bringing it to the attention of a user or external system, and receiving information that corrects one of the policies or specifies a precedence relationship among the policies.

Other References

  • Kumar, Vipin, et al., "Algorithms for Constraint Satisfaction Problems: A Survey", Al Magazine, 13(1):32-44, 1992
  • B. Aiken, et al., "Network Policy and Services: A Report of a Workshop on Middleware", RFC 2768, Feb. 2000, pp. 1-29
  • D. Durham, et al., "The COPS (Common Open Policy Service) Protocol", RFC 2748, Jan. 2000, pp. 1-3
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