Method and system for communicating an information packet through multiple networks

• US 7,418,522 B2
• Filed: 06/01/2001
• Issued: 08/26/2008
• Est. Priority Date: 12/21/2000
• Status: Expired due to Term

• Current Assignee: Cloudrock LLC (Slingshot Technologies LLC)
• Original Assignee: Noatak Software LLC (Intellectual Ventures LLC)
• Inventors: Berg, Mitchell T.
• Primary Examiner(s): Patel; Niketa I
• Application Number:
  US09/873,018
• Publication Number:
  US 20020112085A1
• Time in Patent Office: 2,643 Days
• Field of Search: 709/238, 709/223, 709/245, 709/250, 709220-222
• US Class Current: 709/250
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/10015 Access to distributed or replicated servers, e.g. using brokers
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/101 based on network conditions
• CPC Class Codes: H04L 67/1012 based on compliance of requirements or conditions with available server resources
• CPC Class Codes: H04L 67/1014 based on the content of a request
• CPC Class Codes: H04L 67/1019 Random or heuristic server selection
• CPC Class Codes: H04L 67/1023 based on a hash applied to IP addresses or costs
• CPC Class Codes: H04L 67/1027 Persistence of sessions during load balancing
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/142 Managing session states for stateless protocols; Signalling session states; State transitions; Keeping-state mechanisms
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04L 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

Through a first local area network, a first computing device of an information processing system receives an information packet from a global computer network. In response to at least the information packet and a state of the information processing system, the first computing device selectively outputs the information packet when the state of the information processing system is a first state, such that the output information packet bypasses the first local area network. When the state of the information processing system is a second state, the first computing device selectively executes a software application associated with the information packet.

Claims

1. An information processing system, comprising:

a first computing device configured to receive an information packet through a wide area network and a first local area network; and

in response to at least the information packet and a state of the information processing system;

when the state of the information processing system is a first state;

output a migration packet containing information representing a connection endpoint, such that the output migration packet bypasses the first local area network;

receive an acknowledgement packet that indicates that the migration packet was received; and

output the information packet, such that the output information packet bypasses the first local area network; and

when the state of the information processing system is a second state, selectively execute a software application associated with the information packet.

2. The system of claim 1 wherein the first computing device comprises a network interface card.

3. The system of claim 1 wherein the received information packet originates from a client, and wherein the first local area network is coupled to the wide area network to the client.

4. The system of claim 1 wherein the information packet originates from a client, and wherein the first computing device is configured to output the information packet by outputting an encapsulation packet, the encapsulation packet including the information packet, a flag indicating that the packet is an encapsulation packet, and information representing a connection with the client.

5. The system of claim 4 wherein the information representing the connection with the client and the flag indicating that the packet is an encapsulation packet are included within a single header of the encapsulation packet.

6. The system of claim 1 wherein the first computing device is configured to output the information packet to a second computing device for performing an operation in response to the information packet.

7. The system of claim 6 wherein the information packet originates from a client, wherein the first local area network is coupled to the wide area network to the client, wherein the operation includes outputting a response packet to the client through the first local area network and the wide area network, and wherein the first computing device is configured to output the information packet to the second computing device for outputting the response packet to the client, such that the output response packet bypasses the first computing device.

8. The system of claim 6 wherein the operation is part of a software application executed by the second computing device.

9. The system of claim 8 wherein the software application executed by the second computing device is a socket application.

10. The system of claim 1 wherein the information packet is addressed by the client to the first computing device, and wherein the first computing device is configured to receive the information packet from the first local area network in response to the addressing.

11. The system of claim 1 wherein the first computing device is configured to receive at least a portion of the state of the information processing system from the second computing device and a second local area network.

12. The system of claim 1 wherein the first local area network includes a hub.

13. The system of claim 1 wherein the first local area network includes a Layer 2 switch, and wherein the Layer 2 switch is coupled to a router device to the wide area network.

14. The system of claim 1 wherein the first local area network includes a Layer 3 switch, and wherein the Layer 3 switch is coupled to the wide area network.

15. The system of claim 1 wherein the first computing device is configured to output the information packet to a second local area network to a second computing device.

16. The system of claim 15 wherein the first computing device is configured to receive at least a portion of the state of the information processing system from the second computing device and a third local area network.

17. The system of claim 1 wherein the state of the information processing system is based at least in part on a state of a second computing device.

18. A method performed by a first computing device of an information processing system, the method comprising:

receiving an information packet from a first local area network coupled to a wide area network; and

in response to at least the information packet and a state of the information processing system,

when the state of the information processing system is a first state;

outputting a migration packet containing information representing a connection with a client, such that the output migration packet bypasses the first local area network;

receiving an acknowledgement packet that indicates that the migration packet was received; and

outputting the information packet, such that the output information packet bypasses the first local area network; and

when the state of the information processing system is a second state, executing a software application associated with the information packet.

19. The method of claim 18 wherein the first computing device comprises a network interface card.

20. The method of claim 18 wherein the information packet originates from a client, and wherein the first local area network is coupled to the wide area network to the client.

21. The method of claim 18 wherein the information packet originates from a client, and wherein the method comprises:

outputting the information packet by outputting an encapsulation packet, the encapsulation packet including the information packet, a flag indicating that the packet is an encapsulation packet, and information representing a connection with the client.

22. The method of claim 21 wherein the information representing the connection with the client and the flag indicating that the packet is an encapsulation packet are included within a single header of the encapsulation packet.

23. The method of claim 18 wherein the method comprises outputting the information packet to a second computing device for performing an operation in response to the information packet.

24. The method of claim 23 wherein the information packet originates from a client, wherein the first local area network is coupled to the wide area network to the client, wherein the operation includes outputting a response packet to the client and the first local area network and the wide area network, and wherein the method comprises outputting the information packet to the second computing device for outputting the response packet to the client, such that the output response packet bypasses the first computing device.

25. The method of claim 23 wherein the operation is part of a software application executed by the second computing device.

26. The method of claim 25 wherein the software application executed by the second computing device is a socket application.

27. The method of claim 18 wherein the information packet is addressed by the client to the first computing device, and wherein the method comprises:

receiving the information packet from the first local area network in response to the addressing.

28. The method of claim 18 wherein the method comprises:

receiving at least a portion of the state of the information processing system from the second computing device and a second local area network.

29. The method of claim 18 wherein the first local area network includes a hub.

30. The method of claim 18 wherein the first local area network includes a Layer 2 switch, and wherein the Layer 2 switch is coupled to a router to the wide area network.

31. The method of claim 18 wherein the first local area network includes a Layer 3 switch, and wherein the Layer 3 switch is coupled to the wide area network.

32. The method of claim 18 wherein outputting the information packet comprises outputting the information packet to a second local area network to a second computing device.

33. The method of claim 32 wherein the method comprises:

receiving at least a portion of the state of the information processing system from the second computing device and a third local area network.

34. The method of claim 18 wherein the state of the information processing system is based at least in part on a state of a second computing device.

35. A server farm, comprising:

a first computing device configured to receive an information packet through a wide area network and a first local area network; and

in response to at least the information packet and a state of the server farm,

when the state is a first state;

output a migration packet containing information representing a connection to a client, such that the output migration packet bypasses the first local area network;

receive an acknowledgement packet that indicates that the migration packet was received; and

output the information packet, such that the output information packet bypasses the first local area network; and

when the state is a second state, execute a software application associated with the information packet.

36. The server farm of claim 35 wherein the state of the server farm is based at least in part on a state of the first computing device.

37. The server farm of claim 36 wherein the state of the server farm is based at least in part on a state of a second computing device.

38. The server farm of claim 35 wherein the software application is a socket application.

39. The server farm of claim 35 wherein the first computing device comprises a network interface card.

40. The server farm of claim 35 wherein the first computing device is configured to output the information packet by outputting an encapsulation packet, the encapsulation packet including the information packet, a flag indicating that the packet is an encapsulation packet, and information representing a connection with a client.

41. The server farm of claim 35 wherein the first local area network comprises a Layer 3 switch coupled to the wide area network.

42. A computer-readable memory medium storing instructions that, when executed, cause a first computing device of an information processing system to respond to an information packet received through a first local area network and a wide area network by:

when the information processing system is in a first state, executing a software application associated with the information packet; and

when the information processing system is in a second state;

transmitting a packet containing a reference to a connection endpoint;

receiving an acknowledgement packet that indicates that the packet containing the reference to the connection endpoint was received; and

forwarding the information packet such that the forwarded information packet bypasses the first local area network.

43. The computer-readable memory medium of claim 42 wherein the information packet originates from a client coupled to the wide area network.

44. The computer-readable memory medium of claim 43 wherein the instructions further cause the first computing device to forward the information packet by encapsulating the information packet with a header that includes the reference to the connection endpoint and a flag indicating that the packet is an encapsulated packet.

45. The computer-readable memory medium of claim 42 wherein the software application is a socket application.

46. The computer-readable memory medium of claim 43 wherein the instructions further cause the first computing device to forward the information packet by forwarding the information packet to a second computing device.

47. The computer-readable memory medium of claim 46 wherein the state of the information processing system is based at least in part on a state of the second computing device.

48. The computer-readable memory medium of claim 42 wherein the instructions further cause the first computing device to receive state information from a second local area network.