Steven E Colby

US Patent:

6449647, Sep 10, 2002

Filed:

Sep 21, 1999

Appl. No.:

09/400635

Inventors:

Steven Colby - Billerica MA
John J. Krawczyk - Arlington MA
Rai Krishnan Nair - Acton MA
Katherine Royce - Manchester NH
Kenneth P. Siegel - Nashua NH
Richard C. Stevens - Littleton MA
Scott Wasson - Shrewsbury MA

Assignee:

Cisco Systems, Inc. - San Jose CA

International Classification:

G06F 15173

US Classification:

709226, 709220, 709240

Abstract:

A content-aware flow switch intercepts a client content request in an IP network, and transparently directs the content request to a best-fit server. The best-fit server is chosen based on the type of content requested, the quality of service requirements implied by the content request, the degree of load on available servers, network congestion information, and the proximity of the client to available servers. The flow switch detects client-server flows based on the arrival of TCP SYNs and/or HTTP GETs from the client. The flow switch implicitly deduces the quality of service requirements of a flow based on the content of the flow. The flow switch also provides the functionality of multiple physical web servers on a single web server in a way that is transparent to the client, through the use of virtual web hosts and flow pipes.

US Patent:

6862624, Mar 1, 2005

Filed:

Jul 17, 2002

Appl. No.:

10/197339

Inventors:

Steven Colby - Billerica MA, US
John J. Krawczyk - Arlington MA, US
Raj Krishnan Nair - Acton MA, US
Katherine Royce - Manchester NH, US
Kenneth P. Siegel - Nashua NH, US
Richard C. Stevens - Littleton MA, US
Scott Wasson - Shrewsbury MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F015/173

US Classification:

709226, 709240, 709220

Abstract:

A content-aware flow switch intercepts a client content request in an IP network, and transparently directs the content request to a best-fit server. The best-fit server is chosen based on the type of content requested, the quality of service requirements implied by the content request, the degree of load on available servers, network congestion information, and the proximity of the client to available servers. The flow switch detects client-server flows based on the arrival of TCP SYNs and/or HTTP GETs from the client. The flow switch implicitly deduces the quality of service requirements of a flow based on the content of the flow. The flow switch also provides the functionality of multiple physical web servers on a single web server in a way that is transparent to the client, through the use of virtual web hosts and flow pipes.

US Patent:

7257634, Aug 14, 2007

Filed:

Feb 11, 2005

Appl. No.:

11/056031

Inventors:

Steven Colby - Billerica MA, US
John J. Krawczyk - Arlington MA, US
Raj Krishnan Nair - Acton MA, US
Katherine Royce - Manchester NH, US
Kenneth P. Siegel - Nashua NH, US
Richard C. Stevens - Littleton MA, US
Scott Wasson - Shrewsbury MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/173
G06F 15/177

US Classification:

709226, 709240

Abstract:

A content-aware flow switch intercepts a client content request in an IP network, and transparently directs the content request to a best-fit server. The best-fit server is chosen based on the type of content requested, the quality of service requirements implied by the content request, the degree of load on available servers, network congestion information, and the proximity of the client to available servers. The flow switch detects client-server flows based on the arrival of TCP SYNs and/or HTTP GETs from the client. The flow switch implicitly deduces the quality of service requirements of a flow based on the content of the flow. The flow switch also provides the functionality of multiple physical web servers on a single web server in a way that is transparent to the client, through the use of virtual web hosts and flow pipes.

US Patent:

60062649, Dec 21, 1999

Filed:

Mar 30, 1998

Appl. No.:

9/050524

Inventors:

Steven Colby - Billerica MA
John J. Krawczyk - Arlington MA
Raj Krishnan Nair - Acton MA
Katherine Royce - Manchester NH
Kenneth P. Siegel - Nashua NH
Richard C. Stevens - Littleton MA
Scott Wasson - Shrewsbury MA

Assignee:

Arrowpoint Communications, Inc. - Westford MA

International Classification:

G06F 1300

US Classification:

709226

Abstract:

A content-aware flow switch intercepts a client content request in an IP network, and transparently directs the content request to a best-fit server. The best-fit server is chosen based on the type of content requested, the quality of service requirements implied by the content request, the degree of load on available servers, network congestion information, and the proximity of the client to available servers. The flow switch detects client-server flows based on the arrival of TCP SYNs and/or HTTP GETs from the client. The flow switch implicitly deduces the quality of service requirements of a flow based on the content of the flow. The flow switch also provides the functionality of multiple physical web servers on a single web server in a way that is transparent to the client, through the use of virtual web hosts and flow pipes.