Method and apparatus for network caching and load balancing

• US 6,745,243 B2
• Filed: 06/30/1998
• Issued: 06/01/2004
• Est. Priority Date: 06/30/1998
• Status: Expired due to Term

• Current Assignee: International License Exchange of America, LLC (Equitable IP Corporation)
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Squire, Matthew B., Luciani, James V.
• Primary Examiner(s): Jaroenchonwanit, Bunjob
• Application Number:
  US09/107,069
• Publication Number:
  US 20020049840A1
• Time in Patent Office: 2,163 Days
• Field of Search: 709/230, 709/203, 709/217, 709/219, 709/224, 709/227, 709/250, 709/202, 709/245
• US Class Current: 709/227
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/125 by balancing the load, e.g. traffic engineering
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/25 of the same type
• 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 67/1023 based on a hash applied to IP addresses or costs

Abstract

An apparatus comprising a network interface coupled to a data network, a network address translator and a controller. The network interface may receive network traffic from the communicatively coupled data network adhering to any of a number of alternative network protocols. The network address translator identifies network session information within the received network traffic adhering to any of a number of alternative protocols. The controller selects network traffic to be cached based, at least in part, on the network session information identified by the network address translator.

Claims

1. An apparatus comprising:

a network interface to receive network traffic adhering to a network protocol from a data network based on a first request;

a network address translator, coupled to the network interface, to identify network session information within the received network traffic adhering to said network protocol; and

a controller, coupled to the network address translator, to select network traffic to be cached and to be routed for load balancing based, at least in part, on the network session information identified by the network address translator, wherein said controller forwards the same cached network traffic to a plurality of different clients in response to a plurality of requests.

2. The apparatus of claim 1, wherein the controller selects network traffic to be cached in accordance with a network management strategy programmably embedded within the controller.

3. The apparatus of claim 1, wherein the network session information includes one or more of HyperText Transfer Protocol (HTTP) resource identifier information, file transfer protocol, Gopher service name information, or Archie server name information.

4. The apparatus of claim 1, wherein selecting the appropriate network routing, the controller balances network traffic among a plurality of network routing resources, in accordance with the network management strategy.

5. An apparatus comprising:

a network interface, communicatively coupled to a data network, to receive network traffic based on a first request;

a storage device having stored therein a plurality of programming instructions; and

an execution unit, coupled to the network interface and the storage device, to execute the plurality of programming instructions to provide network management services, including a network cache service employing network address translation to analyze received network traffic adhering to a network protocol to select network traffic to be cached and to forward the same cached network traffic to a plurality of different clients in response to a plurality or requests, and to select network traffic to be routed for load balancing.

6. The apparatus of claim 5, wherein the network traffic to be cached is selected in accordance with a network management strategy.

7. The apparatus of claim 5, wherein the selected network traffic is cached locally.

8. The apparatus of claim 5, wherein the selected network traffic is cached at a remote storage device communicatively coupled to the apparatus.

9. The apparatus of claim 5, wherein the network address translation service analyzes network session information of the network traffic to select network traffic to be cached.

10. The apparatus of claim 9, wherein the network session information includes one or more of HyperText Transfer Protocol (HTTP) resource identifier information, file transfer protocol, Gopher service name information, or Archie server name information.

11. The apparatus of claim 9, wherein the network session information is comprised of Open System Interconnection (OSI) layer 5 information.

12. The apparatus of claim 5, wherein the network management services further comprises a load balancing service employing network address translation to select network identify network routing information for network traffic based, at least in part, on network session information.

13. The apparatus of claim 12, wherein the load balancing service identifies network routing information for network traffic in accordance with the network management strategy.

14. An apparatus comprising:

a network interface to receive network traffic adhering to a network protocol from a data network, the network traffic having network session information identified by a network address translator; and

a controller, coupled to the network address translator, to route the received network traffic for load balancing and caching of the received network traffic in accordance with a network management strategy based, at least in part, on the network session information identified by the network address translator, wherein said controller forwards the same cached network traffic to a plurality of different clients in response to a plurality of requests.

15. The apparatus of claim 14, wherein the network session information is comprised of HyperText Transfer Protocol (HTTP) resource identifier information, file transfer protocol, Gopher service name information, or Archie server name information.

16. The apparatus of claim 14, wherein the network session information is Open System Interconnection (OSI) layer 5 information.

17. The apparatus of claim 14, wherein the controller further selects network traffic to be cached based, at least in part, on the network session information identified by the network address translator.

18. The apparatus of claim 17, wherein the controller selects network traffic to cache in accordance with the network management strategy.

19. A method for network caching, the method comprising:

(a) receiving network traffic corresponding to a network protocol from a data network;

(b) analyzing the network traffic to identify network session information; and

(c) determining whether the network traffic is to be cached and whether to route the traffic for load balancing in accordance with a network management protocol based, at least in part, on the identified network session information of the network traffic; and

(d) transmitting the same cached network traffic to a plurality of different clients requesting said cached network traffic.

20. The method of claim 19, further comprising:

(d) identifying an appropriate networking data path for network traffic not selected to be cached based, at least in pan, on the identified network session information of the network traffic.

21. The method of claim 19, wherein the network session information is Open System Interconnection (OSI) layer 5 information.

22. A storage medium having stored therein a plurality of instructions which, when executed by an execution unit, causes the execution unit to implement network management services including a network caching service employing network address translation to analyze received network traffic adhering to any of a plurality of alternative data network protocols to identify network session information, wherein the network caching service selects network traffic to cache based, at least in part, on the identified network session information in accordance with a network management strategy and forwards the same cached network traffic to a plurality of different clients, said instructions further provide a load balancing service employing network address translation to identify network session information in network traffic received from a communicatively coupled data network, wherein the load balancing service beneficially routes the network traffic to its destination based, at least in part, on the identified network session information.

23. The storage medium of claim 22, wherein the plurality of programming instructions include instructions which, when executed, implement a load balancing service employing network address translation to analyze received network traffic adhering to any of a plurality of alternative data network protocols to identify network session information, wherein the load balancing service beneficially routes the network traffic to its destination based, at least in part, on the identified network session information.