Silvano Gai

6434624, Aug 13, 2002

Jul 23, 2001

09/911122

Silvano Gai - San Jose CA
Keith McCloghrie - Middletown NY
Shai Mohaban - Sunnyvale CA

Cisco Technology, Inc. - San Jose CA

G06F 1300

709232, 709236, 709238, 709246, 370235

A system within a computer network identifies specific traffic flows originating from a given network entity and requests and applies appropriate policy rules or service treatments to the traffic flows. A network entity includes a flow declaration component that communicates with one or more application programs executing on the entity. The flow declaration component includes a message generator and an associated memory for storing one or more traffic flow data structures. For a given traffic flow, the application program issues one or more calls to the flow declaration component providing it with information identifying the traffic flows. The flow declaration component then opens a flow management session with a local policy enforcer that obtains policy rules or service treatments for the identified flow from a policy server and applies those rules or treatments to the specific traffic flows from the network entity.

6651101, Nov 18, 2003

Jul 9, 2002

10/191605

Silvano Gai - San Jose CA
Keith McCloghrie - Middletown NY
Shai Mohaban - Sunnyvale CA

Cisco Technology, Inc. - San Jose CA

G06F 1516

709224, 709235, 709238

A system within a computer network identifies specific traffic flows originating from a given network entity and requests and applies appropriate policy rules or service treatments to the traffic flows. A network entity includes a flow declaration component that communicates with one or more application programs executing on the entity. The flow declaration component includes a message generator and an associated memory for storing one or more traffic flow data structures. For a given traffic flow, the application program issues one or more calls to the flow declaration component providing it with information identifying the traffic flows. The flow declaration component then opens a flow management session with a local policy enforcer that obtains policy rules or service treatments for the identified flow from a policy server and applies those rules or treatments to the specific traffic flows from the network entity.

6658458, Dec 2, 2003

Jun 22, 2000

09/599311

Silvano Gai - San Jose CA
Keith McCloghrie - San Jose CA

Cisco Technology, Inc. - San Jose CA

G06F 1200

709215, 709206

A system for efficiently organizing data or information into an associative memory device, such as a ternary content addressable memory (TCAM), for subsequent searching divides the TCAM is divided into a plurality of individual stages that are interconnected in a cascading fashion. The data or information that is to be stored into the TCAM for subsequent searching is initially translated into a first Boolean representation, such as a binary decision diagram (BDD), that is partitioned into a plurality of segments. Each segment defines one or more outputs, and the outputs from one segment define the inputs to the next segment. After partitioning the BDD and identifying the resulting outputs, each BDD segment along with its corresponding outputs is mapped into a particular stage of the TCAM.

6665611, Dec 16, 2003

Jun 19, 2001

09/884239

David R. Oran - Acton MA
Silvano Gai - San Jose CA

Cisco Technology, Inc. - San Jose CA

G01S 2100

701213, 455457, 455456

A system automatically discovers and maintains geographic location information for entities and devices making up a computer network. The system preferably includes a computing unit and a geographic location generator, such as a Global Positioning System (GPS) receiver. The computing unit includes a location discovery entity and a message generator. The GPS receiver, which is mounted to and in communication with the computing unit, may be augmented with an inertial navigation unit to facilitate the generation of location information inside of buildings where GPS signals can be difficult to receive. The computing unit further includes a network communications facility so that it can communicate with one or more network devices, such as a network switch. The switch includes a location recording/reporting entity and a location database. Physical coordinates of network entities or devices are obtained by the GPS receiver and/or-inertial navigation unit and transmitted to the network switch, and the recording/reporting entity stores the physical coordinates at the location database.

6714985, Mar 30, 2004

Apr 28, 2000

09/561839

Dante Malagrino - Santa Clara CA
Thomas J. Edsall - Cupertino CA
Silvano Gai - San Jose CA

Cisco Technology, Inc. - San Jose CA

G06F 1516

709236, 370394

An IP packet reassembly engine provides high-speed and efficient reassembly of IP fragments received at an intermediate station in a computer network. The IP packet reassembly engine comprises a main controller logic circuit configured to âspeed-upâ re-assembly of original packets from IP fragments stored in a frame buffer at multi-gigabit per second rates. To that end, the reassembly engine further includes a content addressable memory having a plurality of entries for maintaining status information for each received fragment and for each original packet being reassembled from the fragments.

6831898, Dec 14, 2004

Aug 16, 2000

09/593566

Thomas J. Edsall - Cupertino CA
Silvano Gai - San Jose CA

Cisco Systems, Inc. - San Jose CA

H04L 1228

370256, 370261

The invention replicates a packet requiring high availability and transmits it from two or more ports of a switch, for example a wiring closet Layer 2 switch. The parent packet carries a unique sequence number. The copies of the packet each carry the parent packets unique sequence number. Each copy of the packet then travels on separate pathways through routers (Layer 3 network devices). The pathways are maintained separate by assigning high costs in a LSP routing sense to links connecting the two paths, and by assigning low costs to links along the desired paths. The two identical packets converge on the destination station. The destination station accepts the first packet with a particular sequence number, and discards any later packets with the same sequence number. In the event that a link in one path has a catastrophic failure, then the packet travelling along the other path reaches the destination station and service remains operative without interruption. The lost path is then recomputed by the a router (if any) still receiving the lost packet.

6874016, Mar 29, 2005

Oct 14, 2003

10/684681

Silvano Gai - San Jose CA, US
Keith McCloghrie - San Jose CA, US

Cisco Technology, Inc. - San Jose CA

G06F012/00

709215, 707 3, 707100

A system for efficiently organizing data or information into an associative memory device, such as a ternary content addressable memory (TCAM), for subsequent searching divides the TCAM is divided into a plurality of individual stages that are interconnected in a cascading fashion. The data or information that is to be stored into the TCAM for subsequent searching is initially translated into a first Boolean representation, such as a binary decision diagram (BDD), that is partitioned into a plurality of segments. Each segment defines one or more outputs, and the outputs from one segment define the inputs to the next segment. After partitioning the BDD and identifying the resulting outputs, each BDD segment along with its corresponding outputs is mapped into a particular stage of the TCAM.

6950400, Sep 27, 2005

Jun 12, 2001

09/879553

Christina H. Tran - San Jose CA, US
Daniel R. Ullum - San Jose CA, US
Yichou Lin - San Jose CA, US
Yan-ming Chen - Fremont CA, US
Silvano Gai - San Jose CA, US
Thomas J. Edsall - Cupertino CA, US

Cisco Technology, Inc. - San Jose CA

H04L012/26

370236, 3703954

A network traffic shaper provides high-speed, multi-level shaping. The traffic shaper is in communicating relationship with a forwarding engine, and includes a queue controller having a plurality of queues for storing messages, a scheduler for computing release times, at least one time-searchable memory and a corresponding memory controller. Each queue is preferably associated with a corresponding traffic specifier, and a release time is computed for each queue and stored in the time-searchable memory. When a stored release time expires, the message at the head of the corresponding queue is retrieved and is either moved into a different queue or forwarded by the network device. By moving messages through two or more queues, each having its own release time computed in response to a different traffic specifier, the traffic shaper can perform multi-level shaping on network messages.