Donald R Banks

Author:

Donald Banks

ISBN #:

0851104533

US Patent:

7003692, Feb 21, 2006

Filed:

May 24, 2002

Appl. No.:

10/156563

Inventors:

Donald Banks - San Jose CA, US
Praveen Joshi - Union City CA, US
Seok Anthony Koh - Fremont CA, US
Ajoy K. Thamattoor - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

714 12, 713 1

Abstract:

A system and method for supporting a “hitless” switchover from an Active to a Standby processor utilizes several points of configuration synchronization. The startup and running configuration files are copied to the Standby processor and subsequent modifications to the Active configuration are synchronized to the Standby configuration.

US Patent:

7320127, Jan 15, 2008

Filed:

Nov 25, 2003

Appl. No.:

10/723684

Inventors:

Donald Banks - San Jose CA, US
Praveen Joshi - Sunnyvale CA, US
Seok Anthony Koh - Fremont CA, US
John Welder - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 9/45

US Classification:

717168

Abstract:

Methods and devices are provided for maintaining configuration synchronization when an Active unit and a Standby unit have different versions of a software image. Preferred implementations allow the system to operate in a stateful mode even after the Standby unit has had an image upgrade. Other implementations allow the system to operate in a stateful mode when the Active unit has a higher-level version of the image than the Standby unit.

US Patent:

7383541, Jun 3, 2008

Filed:

Aug 7, 2003

Appl. No.:

10/638149

Inventors:

Donald E. Banks - San Jose CA, US
Thomas W. Uban - Valparaiso IN, US
Timothy P. Donahue - Natick MA, US
Denis H. Leclerc - Sterling MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 9/44

US Classification:

717131, 717126, 717130

Abstract:

A method is disclosed for providing interoperation of a first execution image of a first version and a second execution image of a second version. A compatibility matrix specifies whether the versions are compatible, base-level compatible, or incompatible. In one embodiment, the compatibility matrix may comprise a sparse table that stores a compatibility indicator for all permutations of a plurality of versions of a network operating system. As part of initialization of a system that includes the first execution image and second execution image, version information for the execution images is determined. An entry in the compatibility matrix corresponding to the versions is identified. The execution images are operated in a fully synchronized state when the identified entry of the compatibility matrix specifies that the versions are either compatible or base-level compatible. Individual components of the execution images interoperate according to the results of individual session negotiations. If the versions are incompatible, an alternative redundancy operation mode may be used.

US Patent:

7590760, Sep 15, 2009

Filed:

May 24, 2002

Appl. No.:

10/156556

Inventors:

Donald Banks - San Jose CA, US
Vijay Savla - Acton MA, US
Timothy Donahue - Natick MA, US
Balachander Chandrasekaran - Milpitas CA, US
Denis Leclerc - Sterling MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16
G06F 15/173
G06F 11/00

US Classification:

709248, 709223, 714 11

Abstract:

A system and method for supporting a “hitless” switchover from an Active to a Standby processor uses a hybrid synchronization of interface states to allow applications that have been modified to have HA aware features and non-modified applications to function on the system. An interface description data block on the Standby RP is synchronized to the interface description data block on the Active RP and is maintained in a shadow state when the Active RP controls the system. In the event of a switchover between the RPs the interface description data block on the Standby RP is copied from the shadow state to a real state and applications on the Standby RP are notified of a status change.

US Patent:

7594034, Sep 22, 2009

Filed:

Mar 27, 2006

Appl. No.:

11/390583

Inventors:

Donald Banks - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16

US Classification:

709246, 709204, 709205, 709206

Abstract:

A method and system for transforming client messages including foreign-owned fields that utilizes an infrastructure to transform the foreign-owned fields independently of the transformation of the client message.

US Patent:

7661025, Feb 9, 2010

Filed:

Jan 19, 2006

Appl. No.:

11/336167

Inventors:

Donald Edward Banks - San Jose CA, US
Saravanan Valapady Kanan - TamilNadu, IN
Sukhdev S. Kapur - Saratoga CA, US
Joseph Michaelsamy Swaminathan - Union City CA, US
Robert Arthur Land - Santa Barbara CA, US

Assignee:

Cisco Technoloy, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

714 12, 717168

Abstract:

A method of establishing and maintaining a consistent configuration state of a first processor, running on a first version of operating software, and a second processor, running on a second version of operating software, is described. The method involves determining a current configuration state of the first processor, where the configuration state comprises a list of configuration commands. The method also involves performing a syntax check for each command in the current configuration, using the second processor and the second version of operating software, with the syntax check resulting in a pass or a fail result. For every command which results in a fail result, an entry is added to a mismatched configuration list (MCL). Embodiments of this invention can be utilized to keep the configurations consistent during an upgrade or downgrade of the operating software.

US Patent:

7734591, Jun 8, 2010

Filed:

Mar 12, 2004

Appl. No.:

10/800109

Inventors:

Christina Woody Mercier - Scotts Valley CA, US
William Tracy Fuller - Cupertino CA, US
Donald Edward Banks - San Jose CA, US
Thomas Alan Rinehart - Durham NC, US
Bang Chang - Morrisville NC, US
Noel Christopher Melville - Santa Cruz CA, US

Assignee:

NetApp, Inc. - Sunnyvale CA

International Classification:

G06F 12/00

US Classification:

707639, 707687

Abstract:

An apparatus provides coherent data copying operations where data replication is controlled by a source storage controller directly to a destination controller and managed by a remote application. The apparatus generates a snapshot version for each source data block changed by one or more write operations to the source data block during the course of a copy operation; and copies each block of the source data to a corresponding block in the destination data in the absence of the snapshot version of the block and otherwise copying the snapshot version of the source data block to the corresponding block in the destination data.

US Patent:

8006129, Aug 23, 2011

Filed:

Oct 3, 2008

Appl. No.:

12/245157

Inventors:

Donald E. Banks - San Jose CA, US
Samer L. Theodossy - San Jose CA, US
Frederick A. Frazer - Santa Clara CA, US
Frederick G. Lewis - North Chelmsford MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

714 10, 714 11, 714 12, 714 47, 714 48

Abstract:

In an example embodiment the occurrence of the split-brain condition in a High-Availability system, having active and standby processing units, is detected, its cause is diagnosed, and the cause is treated to prevent interruption of service. Diagnosis and treatment procedures are performed at the active processing unit prior to being performed at the standby processing unit.