Network cache-based content routing

• US 7,395,348 B1
• Filed: 06/05/2000
• Issued: 07/01/2008
• Est. Priority Date: 06/05/2000
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Kagan, Martin, Aviani, James, Cieslak, Martin
• Primary Examiner(s): Kang; Paul H.
• Application Number:
  US09/588,027
• Time in Patent Office: 2,948 Days
• Field of Search: 709/203, 709/204, 709/206, 709/207, 709/217, 709/223, 709/232, 709/234, 709/235, 709/238, 709/245, 370/392
• US Class Current: 709/238
• CPC Class Codes: H04L 45/306 Route determination based on the nature of the carried application
• CPC Class Codes: H04L 67/563 Data redirection of data network streams
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context

Abstract

Methods and apparatus are described for routing data traffic in a network having a plurality of layers including physical, data link, and network layers. The data traffic is received and one of a plurality of routing options for the data traffic is selected with reference to information outside of the physical, data link, and network layers. The data traffic is then routed according to the selected routing option.

Claims

1. A computer-implemented method for routing data traffic in a network having a plurality of network layers including an application layer, the method comprising:

receiving the data traffic at a network cache;

determining, at the network cache, a destination network device to which to forward the data traffic;

selecting, at the network cache, one of a plurality of routing options for the data traffic with reference to information in the application layer; and

routing the data traffic according to the selected routing option, wherein the routing includes forwarding the data traffic from the network cache to the destination network device.

2. The method of claim 1 wherein the data traffic has been redirected from an original destination according to a caching protocol.

3. The method of claim 1 wherein the data traffic comprises a request from a source platform to a destination platform.

4. The method of claim 3, wherein the information correlates to a relative size of an object that the request seeks.

5. The method of claim 1 wherein the data traffic comprises a response to a request, the request being from a source platform to a destination platform.

6. The method of claim 1 further comprising parsing the information in the application layer.

7. The method of claim 6 wherein the information comprises a URL associated with the data traffic.

8. The method of claim 7 wherein the information comprises a suffix associated with the URL.

9. The method of claim 8 wherein parsing the information comprises determining whether the suffix associated with the URL indicates one of a plurality of MIME types.

10. The method of claim 9 wherein the plurality of MIME types comprises *.gif, *.jpg, *.pdf, *.mpX, and *.htm.

11. The method of claim 6 wherein parsing the information comprises determining whether the data traffic relates to ascii or binary data objects.

12. The method of claim 1 wherein selecting one of the plurality of options comprises setting one of a plurality of socket options for the data traffic.

13. The method of claim 12 wherein the plurality of socket options include a first link and a second link, the first link socket option being selected for a first type of data traffic and the second link socket option being selected for a second type of data traffic.

14. The method of claim 13 wherein the first and second links comprise land and satellite links, respectively.

15. The method of claim 13 wherein the first and second types of data comprise ascii and binary data, respectively.

16. A computer program product comprising a computer readable medium having computer program instructions stored therein for implementing the method of claim 1.

17. The method of claim 1, wherein selecting one of the plurality of routing options for the data traffic is based on relative network resource expenses of data traffic types.

18. The method of claim 1, further comprising determining an endpoint for the data traffic using information contained in the network layer of the data traffic.

19. The method of claim 18, wherein the routing options indicate potential routing paths from the network cache to the endpoint.

20. A computer-implemented method for routing data traffic in a network which has been redirected to a network cache, the method comprising:

receiving the data traffic with the network cache;

determining, at the network cache, a destination network device to which to forward the data traffic;

selecting, at the network cache, one of a plurality of routing options for the data traffic with reference to information in the application layer; and

routing the data traffic according to the selected routing option, wherein the routing includes forwarding the data traffic from the network cache to the destination network device.

21. The method of claim 20 wherein the information relates to whether a data object associated with the data traffic is cacheable.

22. The method of claim 20 wherein the information relates to whether the data traffic comprises a forced reload.

23. A computer program product comprising a computer readable medium having computer program instructions stored therein for implementing the method of claim 20.

24. The method of claim 20, further comprising determining an endpoint for the data traffic using information contained in the network layer of the data traffic.

25. The method of claim 24, wherein the routing options indicate potential routing paths from the network cache to the endpoint.

26. A computer-implemented method for routing data traffic in a network having a plurality of layers including physical, data link, and network layers, the method comprising:

receiving the data traffic at a network cache;

determining, at the network cache, a destination network device to which to forward the data traffic;

selecting, at the network cache, one of a plurality of routing options for the data traffic with reference to a type of information outside of the physical, data link, and network layers; and

routing the data traffic according to the selected routing option, wherein the routing includes forwarding the data traffic from the network cache to the destination network device.

27. The method of claim 26, further comprising determining an endpoint for the data traffic using information contained in the network layer of the data traffic.

28. The method of claim 27, wherein the routing options indicate potential routing paths from the network cache to the endpoint.

29. A network cache for operating in a network having a plurality of layers including an application layer, comprising:

cache memory for storing a plurality of objects; and

an operating system which is operable to;

receive redirected data traffic;

determine, at the network cache, a destination network device to which to forward the data traffic;

select, at the network cache, one of a plurality of routing options for the data traffic with reference to information in the application layer; and

route the data traffic according to the selected routing option, wherein the routing includes forwarding the data traffic from the network cache to the destination network device.

30. The network cache of claim 29, wherein the operating system is further operable to determine an endpoint for the data traffic using information contained in the network layer of the data traffic.

31. The network cache of claim 30, wherein the routing options indicate potential routing paths from the network cache to the endpoint.

32. A network cache, comprising:

cache memory for storing a plurality of objects; and

a processor which is operable to;

receiving redirected data traffic;

determine, at the network cache, a destination network device to which to forward the data traffic;

select, at the network cache, one of a plurality of routing options for the data traffic with reference to information in the application layer about the data traffic accessible by the network cache; and

route the data traffic according to the selected routing option, wherein the routing includes forwarding the data traffic from the network cache to the destination network device.

33. The network cache of claim 32, wherein the processor is further operable to determine an endpoint for the data traffic using information contained in the network layer of the data traffic.

34. The network cache of claim 33, wherein the routing options indicate potential routing paths from the network cache to the endpoint.

35. A network cache for operating in a network having a plurality of layers including physical, data link, and network layers, comprising:

cache memory for storing a plurality of objects; and

an operating system which is operable to;

receive redirected data traffic;

determine, at the network cache, a destination network device to which to forward the data traffic;

select, at the network cache, one of a plurality of routing options for the data traffic with reference to a type of information outside of the physical, data link, and network layers; and

route the data traffic according to the selected routing option, wherein the routing includes forwarding the data traffic from the network cache to the destination network device.

36. The network cache of claim 35, wherein the operating system is further configured to determine an endpoint for the data traffic using information contained in the network layer of the data traffic.

37. The network cache of claim 36, wherein the routing options indicate potential routing paths from the network cache to the endpoint.