Tuyen Thi Nguyen

US Patent:

7296092, Nov 13, 2007

Filed:

Jun 30, 2004

Appl. No.:

10/881858

Inventors:

Tuyen Nguyen - San Ramon CA, US

Assignee:

Nokia, Inc. - Irving TX

International Classification:

G06F 13/00

US Classification:

709249

Abstract:

An apparatus for a multi-domain computer system includes multiple virtual system domains, each having an associated, independent routing instance. A virtual switch is created to forward packets between the domains. The virtual switch is configured to operate substantially as if it were a physical layer- switch. The virtual switch and the virtual domains are connected together by virtual interfaces, where the virtual switch, the virtual domains, and the virtual interfaces are all created in software. Further, protocols such as ARP, IP, and/or IPv6 operate over the virtual interfaces in substantially the same way that they would over Ethernet. Also, each domain has a software driver that behaves like an Ethernet driver, and has a 48-bit Ethernet-like address that is used for the physical address.

US Patent:

7769862, Aug 3, 2010

Filed:

Dec 19, 2003

Appl. No.:

10/741594

Inventors:

Ravi I. Singh - Sunnyvale CA, US
Tuyen Nguyen - San Ramon CA, US

Assignee:

Check Point Software Technologies Inc. - Redwood City CA

International Classification:

G06F 15/173

US Classification:

709226, 709208, 709223, 709250, 370216, 370219

Abstract:

A method and apparatus is directed towards managing fail-over in a network. At least one back-up device is configured to process traffic if a fail-over condition occurs. The back-up device includes a physical interface. A logical interface X associated with the physical interface is monitored to determine if the fail-over condition has occurred. If it is determined that the fail-over condition has occurred on interface X, then the back-up device processes traffic for another logical interface Y, associated with the physical interface. Accordingly, logical interface Y may be unmonitored. According to one embodiment, if it is determined that the fail-over condition has occurred, the back-up device processes traffic for every logical interface associated with the physical interface.

US Patent:

7885180, Feb 8, 2011

Filed:

Dec 15, 2006

Appl. No.:

11/639423

Inventors:

Raveendra Chamarajanagar - Mountain View CA, US
Peter Hunt - Sunnyvale CA, US
Scott Kimble - Sunnyvale CA, US
Tuyen Nguyen - San Ramon CA, US

Assignee:

Check Point Software Technologies Inc. - Redwood City CA

International Classification:

G06F 11/00

US Classification:

370219, 370389, 370400

Abstract:

Address Resolution Protocol (ARP) request mirroring can provide a mechanism for synchronizing link-layer adjacency information among network elements. This application can be useful, for example, for internet protocol (IP) routing network elements in a high-availability configuration.

US Patent:

20050257002, Nov 17, 2005

Filed:

Apr 30, 2004

Appl. No.:

10/837559

Inventors:

Tuyen Nguyen - San Ramon CA, US

Assignee:

Nokia, Inc. - Irving TX

International Classification:

G06F012/16

US Classification:

711114000

Abstract:

A method and apparatus for synchronizing a neighbor cache table of a backup network device and with a neighbor cache table of a master network device is provided. The master network device may send an Add command or a Delete command to the backup network device whenever entry is added or deleted from the neighbor cache table of the master network device. Further, when a new network device joins the link to become master or backup, synchronize request and synchronize acknowledge commands may be employed to synchronize the new network device with the master network device. Additionally, when a network device becomes the master, it may send an update command to enable the neighbor switch devices to update their neighbor cache table, if any, to redirect traffic to the network device.

US Patent:

20060045088, Mar 2, 2006

Filed:

Aug 25, 2004

Appl. No.:

10/926741

Inventors:

Tuyen Nguyen - San Ramon CA, US

Assignee:

Nokia Inc. - Irving TX

International Classification:

H04L 12/56

US Classification:

370392000

Abstract:

A method for using Patricia tree and longest prefix match for policy-based route look-up is described. Five route classes are determined based on a source address, a source address length, a destination address, a destination address length, and an ingress interface. Route classes are prioritized based on their content. A prefix for the first two route classes includes source and destination information. A prefix for the third and fourth route classes includes source information only. A prefix for the fifth route class includes destination information only. Four different route keys are constructed based on the route classes. The route keys are stored in a Patricia tree structure. For routing a data packet, a longest prefix match look-up is performed for a route key in descending priority order for the route classes.

US Patent:

20080144634, Jun 19, 2008

Filed:

Dec 15, 2006

Appl. No.:

11/639422

Inventors:

Raveendra Chamarajanagar - Mountain View CA, US
Peter Hunt - Sunnyvale CA, US
Scott Kimble - Sunnyvale CA, US
Tuyen Nguyen - San Ramon CA, US
Giritharan Rashiyamany - Mountain View CA, US

International Classification:

H04L 12/56

US Classification:

370397

Abstract:

Selective passive address resolution protocol (ARP) learning can provide a passive mechanism to synchronize link layer adjacency information among network elements. Selective passive ARP learning can be implemented by a modification to the ARP requests processing of the standby node, with a filter list containing a set of match rules for target network addresses. The implementation, thus, can be a configurable filter that enables software modules to specify a set of internet protocol (IP) addresses that the ARP input engine should monitor.

US Patent:

20200259299, Aug 13, 2020

Filed:

Feb 7, 2020

Appl. No.:

16/784484

Inventors:

- Shenzhen City, CN
- Ewing NJ, US
Natasha V. KACHENKO - Fremont CA, US
Vincent WONG - Fremont CA, US
Tuyen NGUYEN - Fremont CA, US

International Classification:

H01R 13/66
G01R 19/145
G01R 19/165
H02H 3/08
G01D 11/24
G01D 21/00

Abstract:

The present application provides a sensor, relates to sensing technology field, the sensor includes a sensor body, a main circuit module disposed in the sensor body and an sensing assembly electrically connect to the main circuit module, and further includes a circuit protection module disposed at outside of the sensor body and electrically connected to the main circuit module. In the present application, the main circuit module and the sensing assembly are used as the core components to achieve the functions of sensing and information conversion of the sensor; the circuit protection module is disposed outside the sensor body to realize the circuit protection function of the sensor. Specifically, the sensor can pass the test of the lightning surge test standard IEC61000-4-5 surge, and can also protect from static electricity of a high level and the impact of the electric fast transient pulse group; in addition, since the circuit protection module is disposed outside of the sensor body and the inner volume of the sensor is not occupied, such that the circuit protection performance of the sensor is further optimized and improved without any change on the inherent structure of the sensor body.

US Patent:

20140362681, Dec 11, 2014

Filed:

Jun 10, 2013

Appl. No.:

13/913537

Inventors:

- Tel-Aviv, IL
Tuyen NGUYEN - San Ramon CA, US

International Classification:

H04L 12/24
H04L 12/707

US Classification:

370219

Abstract:

A network device which communicates with peers using Border Gateway Protocol (BGP) advertises to one or more peers a first Multi-Exit Discriminator (MED) when all sessions are in ‘established’ state, and a second MED when one or more sessions are in a non-‘established’ state. The second MED is higher than the first MED and higher than the MED advertised by the backup network device, causing peers to prefer the backup device. If the device is also configured for Virtual Router Redundancy Protocol (VRRP), when the device advertises the first MED, virtual routers are transitioned to ‘master’ state, and when the device advertises the second MED, virtual routers are transitioned to ‘backup’ state.

Address:

252 Sposito Cir, San Jose, CA 95136

VIN:

4JGBB86E87A283526

Make:

MERCEDES

Model:

ML350

Year:

2007