Frederick J Baker

US Patent:

6594260, Jul 15, 2003

Filed:

Sep 3, 1999

Appl. No.:

09/390520

Inventors:

Frederick Jurgens Baker - Santa Barbara CA
Ulana Maria Sonia Legedza - Cambridge MA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1256

US Classification:

370389, 370235, 709203, 709217, 709228

Abstract:

Before sending a connection setup packet, a client sends a heads up packet (HUP) toward the server from which the client is requesting data. The HUP contains information about the data that the client is requesting. Recipient servers along the path between the client and the requested server decode the HUP. If the recipient servers know of a more convenient source for the requested data, the setup and heads up packets are modified to point to the more convenient source and are forwarded in the sources direction. HUPs are designed to be ignored by recipient servers not designed to decode them. In this way, HUPS can operate over existing networks. HUPs are designed to be small, to facilitate quick decoding and ensure the HUP is not fragmented. A HUP includes an indication of the setup packet about whose connection it has data. If a server receives the HUP but not the associated setup packet, the server will drop the HUP.

US Patent:

6678244, Jan 13, 2004

Filed:

Jan 6, 2000

Appl. No.:

09/478969

Inventors:

Chandrashekhar Appanna - Santa Clara CA
Claude Cartee - Los Altos CA
Frederick Baker - Santa Barbara CA
Kenneth Moberg - Boulder Creek CA
Andrew Valencia - Vashon WA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G01R 3108

US Classification:

370229, 370400, 370408, 370412

Abstract:

A method of monitoring congestion within a data path having a queuing node located therein and a plurality of downstream nodes positioned downstream of the queuing node. The method includes monitoring congestion at the plurality of downstream nodes and setting a congestion notification flag by one of the downstream nodes when the node is congested. The transmission of data packets from the queuing node is stopped and packets received at the queuing node are queued when the flag is set. The method further includes transmitting packets from the queuing node when the congestion notification flag is cleared. A system for monitoring congestion on a data path is also disclosed.

US Patent:

6742044, May 25, 2004

Filed:

May 10, 2000

Appl. No.:

09/569090

Inventors:

James Aviani - Santa Barbara CA
David Eric Swanson - Santa Barbara CA
Frederick Baker - Santa Barbara CA
Matthew Richard Gnagy - Sacramento CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 1516

US Classification:

709235, 709225, 709226, 709227, 709229, 709238

Abstract:

The technique of the present invention provides a solution to the problem of routing or redirecting a given client to a replica or proxy server which has a relatively shortest propagation delay to the client. According to the technique of the present invention, a network device referred to as an intercept server sits in front of a host server, and intercepts packets routed to the host server. When desired, packets which are intercepted by the intercept server are replicated, encapsulated and tunneled to selected client servers in the overlay network. The tunneled packets are received and processed by each of the selected client servers, whereupon each of the selected client servers generates a respective spoofed response to the source device identified in the header of the originally intercepted packet. Further, according to the technique of the present invention, each of the selected client servers transmits its respective spoofed response to the identified source device at substantially the same time. The client server associated with the spoofed response which is first received at the identified source device is considered to have the relatively shortest propagation delay to the identified source device, and is identified as the successful client server.

US Patent:

6775231, Aug 10, 2004

Filed:

Sep 24, 1999

Appl. No.:

09/405458

Inventors:

Frederick Baker - Santa Barbara CA
Qingming Ma - Cupertino CA

Assignee:

Cisco Technology - San Jose CA

International Classification:

H04J 116

US Classification:

3702301, 370232, 370235, 37039541, 370412, 370429

Abstract:

In one embodiment, the technique dynamically adjusts resource allocations for each traffic class based on actual traffic load measured for each service class. In this way, the per-hop-behavior required by a differentiated service model may be achieved. Core nodes of a network operating according to a differentiated service model dynamically adjust resource allocations for multiple traffic classes without requiring explicit signaling from other network nodes. Policies for sharing resources among multiple service classes can be enforced.

US Patent:

6789125, Sep 7, 2004

Filed:

May 10, 2000

Appl. No.:

09/569083

Inventors:

James Aviani - Santa Barbara CA
David Eric Swanson - Santa Barbara CA
Frederick Baker - Santa Barbara CA
Matthew Richard Gnagy - Sacramento CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 1516

US Classification:

709238

Abstract:

The technique of the present invention provides a solution to the problem of routing or redirecting a given client to a replica or proxy server which has a relatively shortest propagation delay to the client. According to the technique of the present invention, a network device referred to as an intercept server sits in front of a host server, and intercepts packets routed to the host server. When desired, packets which are intercepted by the intercept server are replicated, encapsulated and tunneled to selected client servers in the overlay network. The tunneled packets are received and processed by each of the selected client servers, whereupon each of the selected client servers generates a respective spoofed response to the source device identified in the header of the originally intercepted packet. Further, according to the technique of the present invention, each of the selected client servers transmits its respective spoofed response to the identified source device at substantially the same time. The client server associated with the spoofed response which is first received at the identified source device is considered to have the relatively shortest propagation delay to the identified source device, and is identified as the successful client server.

US Patent:

7062562, Jun 13, 2006

Filed:

Apr 11, 2001

Appl. No.:

09/833387

Inventors:

Frederick Baker - Santa Barbara CA, US
Bruce Lueckenhoff - Santa Barbara CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16

US Classification:

709227, 709203, 709223, 709224, 709226, 709232, 718105

Abstract:

Methods and apparatus providing information about characteristics associated with a network are described. A network node associated with a client for selecting a server that can best provide content to a client transmits a request for a response. A plurality of content servers or content routing agents receive requests corresponding to the request from the network node associated with the client. The content servers provide a response and fragment and/or pad datagrams associated with the response. The content servers transmit these fragmented and/or padded datagrams to the network node associated with the client. The network node associated with the client can reassemble and/or trim the received datagrams and identify as optimal the server that first completes transmission of the response.

US Patent:

7080138, Jul 18, 2006

Filed:

Apr 11, 2001

Appl. No.:

09/833388

Inventors:

Frederick Baker - Santa Barbara CA, US
Bruce Lueckenhoff - Santa Barbara CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/173

US Classification:

709224, 709203, 709227, 709229, 718104, 718105, 370232, 370234

Abstract:

Methods and apparatus providing information about characteristics associated with a network are described. A network node associated with a client for selecting a server that can best provide content to a client transmits a request for a response. A plurality of content servers or content routing agents receive requests corresponding to the request from the network node associated with the client. The content servers provide a response and fragment and/or pad datagrams associated with the response. The content servers transmit these fragmented and/or padded datagrams to the network node associated with the client. The network node associated with the client can reassemble and/or trim the received datagrams and identify as optimal the server that first completes transmission of the response.

US Patent:

7401159, Jul 15, 2008

Filed:

May 20, 2004

Appl. No.:

10/851456

Inventors:

James Aviani - Santa Barbara CA, US
David Eric Swanson - Santa Barbara CA, US
Frederick Baker - Santa Barbara CA, US
Matthew Richard Gnagy - Sacramento CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/173
G06F 15/16

US Classification:

709238, 709225, 709226, 709229, 709235, 3702301

Abstract:

The technique of the present invention provides a solution to the problem of routing or redirecting a given client to a replica or proxy server which has a relatively shortest propagation delay to the client. According to the technique of the present invention, a network device referred to as an intercept server sits in front of a host server, and intercepts packets routed to the host server. When desired, packets which are intercepted by the intercept server are replicated, encapsulated and tunneled to selected client servers in the overlay network. The tunneled packets are received and processed by each of the selected client servers, whereupon each of the selected client servers generates a respective spoofed response to the source device identified in the header of the originally intercepted packet. Further, according to the technique of the present invention, each of the selected client servers transmits its respective spoofed response to the identified source device at substantially the same time. The client server associated with the spoofed response which is first received at the identified source device is considered to have the relatively shortest propagation delay to the identified source device, and is identified as the successful client server.