Clare Y Chu

US Patent:

6393473, May 21, 2002

Filed:

Dec 18, 1998

Appl. No.:

09/215393

Inventors:

Clare Chu - Fremont CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15177

US Classification:

709223

Abstract:

A method and apparatus are provided for representing abstract network management policies and processing such policies to resolve conflicts. In one aspect, the invention provides a method of managing a network according to a plurality of network management policies, comprising the steps of storing each of the policies as a constraint that comprises one or more variables, a set of possible values, and a set of restrictions on the values that the variables can simultaneously take; storing one or more collective constraints, in which at least one of the constraints is that none of the variables may interfere with one another; applying a constraint satisfaction algorithm to the stored variables, values, restrictions, to create zero or more solutions and checking the solution set against the collective constraints; identifying a conflict in the policies when zero solutions are created and when one or more of the instance or collective constraints is violated; and resolving the conflict by modifying one or more of the variables, values or restrictions. Using a collective constraint representation, policy conflicts are rapidly identified and resolved. Resolution may be accomplished simply by adding a constraint that defines a change in a variable, value, or restriction or redefining the collective constraints.

US Patent:

6944130, Sep 13, 2005

Filed:

May 31, 2000

Appl. No.:

09/585709

Inventors:

Clare Chu - Fremont CA, US
Stephen Schleimer - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L012/26
H04L012/28

US Classification:

3702381, 370252, 370254, 370389, 370400, 37039553

Abstract:

A method and apparatus that provide for a Layer path determination are disclosed. In one embodiment of the invention, a Layer path between a source device and destination device is first determined in order to identify contiguous pairs of Layer devices. A subpath is then determined for each contiguous pair of Layer devices based on VLAN and spanning tree information associated with the contiguous pair. The Layer path is a concatenation of the subpaths of all the contiguous pairs in the Layer path.

US Patent:

6954462, Oct 11, 2005

Filed:

Jul 31, 2000

Appl. No.:

09/629044

Inventors:

Clare Chu - Fremont CA, US
Mehryar Garakani - Los Angeles CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L012/28
H04L012/56

US Classification:

370400, 370401

Abstract:

A method and apparatus that provide for determining a multilayer switching path are disclosed. In one embodiment of the invention, a Layer 3 path and a Layer 2 path between a source device and destination device are first determined in order to identify the relevant switch engines that perform the multilayer switching. Determining whether the switch engines satisfy a set of criteria identifies the relevant switch engines.

US Patent:

7411965, Aug 12, 2008

Filed:

Feb 23, 2005

Appl. No.:

11/064746

Inventors:

Clare Chu - Fremont CA, US
Mehryar Garakani - Los Angeles CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370400, 370401

Abstract:

A method and apparatus that provide for determining a multilayer switching path are disclosed. In one embodiment of the invention, a Layer 3 path and a Layer 2 path between a source device and destination device are first determined in order to identify the relevant switch engines that perform the multilayer switching. Determining whether the switch engines satisfy a set of criteria identifies the relevant switch engines.

US Patent:

7467192, Dec 16, 2008

Filed:

Nov 30, 2000

Appl. No.:

09/728442

Inventors:

Christian Lemler - Fremont CA, US
Karen Ann Bradley - San Jose CA, US
Amrit C. Patel - Pleasanton CA, US
Ray Mein Lau - Sacramento CA, US
Clare Yung-Lei Chu - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16

US Classification:

709223, 709224, 709220, 715762

Abstract:

A service monitoring mechanism for providing on-line standardized contract configurations for monitoring Service Level Agreements (SLAs) and Service Level Contracts (SLCs) is described. The service monitoring mechanism provides a method for monitoring a service level agreement that defines for a particular network, a level of service that has been offered to a customer by a service provider. In one aspect, to provide for the monitoring of a service level agreement, a Service Level Manger (SLM) is configured to manage, monitor, and verify the SLAs that have been established between a customer and a Service Provider. The SLM provides a standardized open interface that allows users, including third parties, to define SLCs and SLAs for monitoring and verifying the level of service that is being provided by a service provider. In one aspect, the standardized open interface is provided through the use of one or more schemas that include a set of rules that define the tags that can be included within a document and how the tags may be nested within the document. The one or more schemas specify the set of required and optional elements (and their attributes) and the ways in which they may be combined within a document.

US Patent:

61821195, Jan 30, 2001

Filed:

Dec 2, 1997

Appl. No.:

8/982879

Inventors:

Clare Chu - Fremont CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 1516
G06F 1517

US Classification:

709206

Abstract:

A method and system for filtering and acting upon data are provided. The specific identity, behavior and relationship between the various components that make up the system are not fixed at compile time. Rather, flexibility is maintained by establishing the identity, behavior and relationships based on configuration data at run time. At run time, various source, filter and action modules that are specified in configuration data are loaded into dynamic memory and initialized. The publisher-subscriber relationships are then established between the loaded modules based on said configuration data. A user interface is provided which allows a user to specify changes to the publisher-subscriber relationships between the components, or to the initialization arguments of the components. The various components of the system may be implemented as objects that are instances of JAVA classes.