Edward L Kersey

US Patent:

6366558, Apr 2, 2002

Filed:

Jun 30, 1998

Appl. No.:

09/107261

Inventors:

Richard A. Howes - Roswell GA
Edward C. Kersey - Athens GA
Bruce F. Wong - Athens GA
James A. Jordan - Lawrenceville GA
William M. Leblanc - Athens GA
Andrew L. Foss - San Jose CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G01R 3108

US Classification:

370219, 370218, 370254, 370392

Abstract:

A system and method are disclosed for maintaining the state of a virtual connection supported by an active connection manager on a standby connection manager. The method includes configuring the standby connection manager to include a physical machine object that stores a physical IP address of a physical machine that is available to the active connection manager and a virtual machine object that stores a virtual IP address of a virtual machine that is implemented on the connection manager. A replication packet is received at the standby connection manager from the active connection manager wherein the replication packet includes a foreign IP address, the virtual IP address and the physical IP address. A standby connection object is stored in the connection manager. The standby connection object includes the foreign IP address, the virtual IP address and the physical IP address from the replication packet on the standby connection manager.

US Patent:

6445704, Sep 3, 2002

Filed:

Jun 30, 1998

Appl. No.:

09/107238

Inventors:

Richard A. Howes - Roswell GA
Edward C. Kersey - Athens GA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1256

US Classification:

370392, 370401, 370471, 709203

Abstract:

A system and method are disclosed for virtualizing locally initiated outbound connections from a physical machine used to implement a virtual machine. The method includes providing a virtual machine object having a virtual IP address that corresponds to the virtual machine. Inbound connections directed to the virtual machine are handled by the physical machine having a physical machine IP address. A static physical machine object is also provided. The static physical machine object contains the virtual IP address and the physical machine IP address. When a SYN packet is intercepted for an outbound connection having a SYN packet source IP address that corresponds to the physical machine IP address and a packet destination address that corresponds to a foreign IP address, it is determined whether the packet source IP address matches the physical machine IP address. If the packet source IP address matches the physical machine IP address, then a connection object is created for handling outbound connections from the physical machine IP address. A counter in a physical machine object is incremented when the connection object is created so that the locally generated connection may be considered for the purpose of load balancing new remotely generated connections.

US Patent:

6549516, Apr 15, 2003

Filed:

Jul 2, 1999

Appl. No.:

09/347108

Inventors:

Mark Albert - Wake Forest NC
Richard A. Howes - Roswell GA
James A. Jordan - Roswell GA
Edward A. Kersey - Alpharetta GA
Louis F. Menditto - Raleigh NC
Chris ORourke - Morrisville NC
Pranav Kumar Tiwari - Raleigh NC
Tzu-Ming Tsang - Chapel Hill NC

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1256

US Classification:

370236, 709203, 709226, 370432, 370389

Abstract:

A system and method are described for providing instructions for forwarding packets. The method includes broadcasting a general instruction specifying a plurality of flows to a plurality of forwarding agents and receiving at a service manager a first message responsive to the general instruction indicating that a packet for a specific flow has been received by a specific forwarding agent. A specific instruction is generated at the service manager for handling the specific flow and the specific instruction for handling the specific flow is sent to the specific forwarding agent.

US Patent:

6606315, Aug 12, 2003

Filed:

Jul 2, 1999

Appl. No.:

09/347048

Inventors:

Mark Albert - Wake Forest NC
Richard A. Howes - Roswell GA
James A. Jordan - Roswell GA
Edward C. Kersey - Alpharetta GA
Louis F. Menditto - Raleigh NC
Chris ORourke - Morrisville NC
Pranav Kumar Tiwari - Raleigh NC
Tzu-Ming Tsang - Chapel Hill NC

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1266

US Classification:

370352

Abstract:

A method of obtaining instructions for routing a packet is described that includes receiving a packet having a packet flow identifier that includes a packet source IP address, a packet destination IP address, a packet source port, and a packet destination port and checking whether the packet flow identifier matches a stored instruction. If the packet flow identifier does not match a stored instruction, whether the packet flow identifier matches a stored criteria is checked and if the packet matches a stored criteria, the packet is forwarded to a service manager.

US Patent:

6633560, Oct 14, 2003

Filed:

Jul 2, 1999

Appl. No.:

09/347126

Inventors:

Mark Albert - Wake Forest NC
Richard A. Howes - Roswell GA
James A. Jordan - Roswell GA
Edward A. Kersey - Alpharetta GA
William M. LeBlanc - Athens GA
Louis F. Menditto - Raleigh NC
Chris ORourke - Morrisville NC
Pranav Kumar Tiwari - Raleigh NC
Tzu-Ming Tsang - Chapel Hill NC

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1228

US Classification:

370351, 370389

Abstract:

A system and method are described for partitioning a network service among a plurality of service managers. The method includes configuring a first service manager to send a first request to a forwarding agent for packets meeting a first criteria and sending the first request to the forwarding agent. A second service manager is configured to send requests to the forwarding agent for packets meeting a second criteria and the second request is sent to the forwarding agent. Packets are checked at the forwarding agent to determine whether the packets meet the first criteria or the second criteria and packets that meet the first criteria are received at the first service manager; and packets that meet the second criteria are received at the second service manager.

US Patent:

6650641, Nov 18, 2003

Filed:

Jul 2, 1999

Appl. No.:

09/347109

Inventors:

Mark Albert - Wake Forest NC
Richard A. Howes - Roswell GA
James A. Jordan - Roswell GA
Edward A. Kersey - Alpharetta GA
William M. LeBlanc - Athens GA
Jacob Mark McGuire - Chapel Hill NC
Louis F. Menditto - Raleigh NC
Chris ORourke - Morrisville NC
Pranav Kumar Tiwari - Raleigh NC
Tzu-Ming Tsang - Chapel Hill NC

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1256

US Classification:

370392, 370467, 370401, 709245

Abstract:

A system and method are disclosed for specifying network address translation for a set of packets. A first set of instructions is sent to a forwarding agent specifying criteria for designated packets that are designated to undergo network address translation. A matching packet is received from the forwarding agent that matches the specified criteria. A network address translation scheme is determined for the matching packet. A second set of instructions are sent specifying the network address translation scheme for packets associated with the matching packet.

US Patent:

6687222, Feb 3, 2004

Filed:

Jul 2, 1999

Appl. No.:

09/347125

Inventors:

Mark Albert - Wake Forest NC
Richard A. Howes - Roswell GA
James A. Jordan - Roswell GA
Edward A. Kersey - Alpharetta GA
William M. LeBlanc - Athens GA
Louis F. Menditto - Raleigh NC
Chris ORourke - Morrisville NC
Pranav Kumar Tiwari - Raleigh NC
Tzu-Ming Tsang - Chapel Hill NC
Bruce F. Wong - Athens GA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1228

US Classification:

370230, 370432

Abstract:

A system and method are disclosed for providing a network service. A first criteria specifying a first set of flows from a first service manager is received at a forwarding agent. The first criteria specifies an expiration time interval. The first criteria is stored on the forwarding agent. A second criteria is received that specifies a second set of flows from a second service manager at the forwarding agent. The second set of flows includes flows that are in the first set of flows and the second criteria is designated as a lower priority criteria. The second criteria is stored on the forwarding agent. The first criteria is deleted from the forwarding agent upon the expiration of the expiration time interval. A packet is received that belongs to a flow that is included in the first set and the second set. It is determined that the packet matches the second set ant the packet is forwarded to the second service manager.

US Patent:

6704278, Mar 9, 2004

Filed:

Jul 2, 1999

Appl. No.:

09/347123

Inventors:

Mark Albert - Wake Forest NC
Richard A. Howes - Roswell GA
James A. Jordan - Roswell GA
Edward A. Kersey - Alpharetta GA
William M. LeBlanc - Athens GA
Louis F. Menditto - Raleigh NC
Chris ORourke - Morrisville NC
Pranav Kumar Tiwari - Raleigh NC
Bruce F. Wong - Athens GA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1226

US Classification:

370216

Abstract:

A system and method are disclosed for providing a fault tolerant network service. A packet is received that corresponds to a flow from a forwarding agent at a primary service manager and instructions are determined at the primary service manager for handling packets corresponding to the flow. The instructions are sent to the forwarding agent and the instructions are stored at the primary service manager. A replication packet is sent to a backup service manager. The replication packet includes the instructions for handling packets corresponding to the flow.