Network emulator

• US 6,862,564 B1
• Filed: 10/26/2000
• Issued: 03/01/2005
• Est. Priority Date: 10/26/2000
• Status: Expired due to Fees

• Current Assignee: Sycamore IP Holdings LLC
• Original Assignee: Sycamore Networks Incorporated
• Inventors: Shue, Chikong, Moy, John Thomas, Yang, Tao, Xie, Raymond
• Primary Examiner(s): PHAN, THAI Q
• Application Number:
  US09/696,860
• Time in Patent Office: 1,587 Days
• Field of Search: 703/25, 703/27, 709/224, 709/225, 709/236, 709/243, 709/229, 709/226, 709/238, 709/239, 709/313, 370/231, 370/232, 370/395, 370/352
• US Class Current: 703/25
• CPC Class Codes: H04L 41/0806 for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 41/145 involving simulating, designing, planning or modelling of a network
• CPC Class Codes: H04L 69/325 in the network layer [OSI layer 3], e.g. X.25 H04L69/16 takes precedence
• CPC Class Codes: H04M 3/323 for the arrangements providing the connection (test connection, test call, call simulation)

Abstract

A system and a method for providing an emulated network including a plurality of emulated networking devices, in which a number of network node executable images are employed. Each of the network node executable images corresponds to one of the emulated networking devices. The emulated networking devices represent physical networking devices, such as optical switches. A portion of each of the network node executable images is operable to execute without modification on a physical networking device. Each of the network node executable images includes a number of program components, such as a topology related program component for maintaining a representation of the topology of the emulated network, a trunk manager program component for maintaining at least one emulated trunk between the corresponding emulated networking device and an adjacent other emulated networking device, and a circuit manager program component operable to maintain at least one emulated circuit between the corresponding emulated networking device and another one of the emulated networking devices. Various numbers of network node executable images may be executed on a single emulator machine, and multiple emulator machines may be employed to execute a single network node executable image.

Claims

1. A network emulator for providing an emulated network, said emulated network including a plurality of emulated networking devices, comprising:

a plurality of network node executable images, each one of said network nodes corresponding to one of said plurality of emulated networking devices; and

wherein each of said network node executable images includes executable code that is operable to execute without modification on a physical networking device corresponding to one of said plurality of emulated networking devices, and wherein said executable code within each of said network node executable images that is operable to execute without modification on a corresponding physical networking device includes a program component operable to perform signaling and routing.

2. The network emulator of claim 1, wherein said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices is operable to be executed within one of several cards that make up said one of said plurality of emulated networking devices.

3. The network emulator of claim 1, wherein said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices includes a program component operable to maintain a representation of a topology of said emulated network.

4. The network emulator of claim 1, wherein said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices includes a program component operable to maintain at least one emulated trunk between a corresponding one of said plurality of emulated networking devices and an adjacent one of said plurality of emulated networking devices.

5. The network emulator of claim 1, wherein said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices includes a program component operable to maintain at least one emulated virtual circuit between a corresponding one of said plurality of emulated networking devices and another one of said plurality of emulated networking devices.

6. The network emulator of claim 1, wherein a plurality of said network node executable images execute on a single emulator machine, wherein said emulator machine includes at least one processor and at least one memory.

7. The network emulator of claim 1, wherein each of said plurality of network node executable images executes on a respective one of a plurality of emulator machines, each one of said plurality of emulator machines including at least one processor and at least one memory.

8. The network emulator of claim 7, wherein said plurality of emulator machines are interconnected by a local area network.

9. The network emulator of claim 8, wherein said local area network is an Ethernet local area network.

10. The network emulator of claim 1, wherein at least one of said plurality of network node executable images executes on an associated plurality of emulator machines.

11. The network emulator of claim 1, wherein each of said plurality of network node executable images further comprises:

a first protocol driver image operable to provide communications between said corresponding one of said plurality of emulated networking devices and other ones of said plurality of emulated networking devices within said network emulator; and

a second protocol driver image operable to provide communications between a physical networking device of said physical networking device type associated with said corresponding one of said plurality of emulated networking devices and other physical networking devices.

12. A method of providing an emulated network, said emulated network including a plurality of emulated networking devices, comprising:

loading a plurality of network node executable images onto at least one emulator machine, each one of said network nodes corresponding to one of said plurality of emulated networking devices; and

wherein each of said network node executable images includes executable code that is operable to execute without modification on a physical networking device corresponding to one of said plurality of emulated networking devices, and wherein said executable code within each of said network node executable images that is operable to execute without modification on a corresponding physical networking device includes a program component operable to perform signaling and routing.

13. The method of claim 12, wherein said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices is operable to be executed within one of several cards that make up said one of said plurality of emulated networking devices.

14. The method of claim 12, further comprising maintaining, by a program component within said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices, a representation of a topology of said emulated network.

15. The method of claim 12, further comprising maintaining, by a program component within said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices, at least one emulated trunk between a corresponding one of said plurality of emulated networking devices and an adjacent one of said plurality of emulated networking devices.

16. The method of claim 12, further comprising maintaining, by a program component within said executable code that is operable to execute without modification on said one of said plurality of emulated networking devices, at least one emulated circuit between a corresponding one of said plurality of emulated networking devices and another one of said plurality of emulated networking devices.

17. The method of claim 12, further comprising executing a plurality of said network node executable images execute on a single one of said at least one emulator machine, wherein said single emulator machine includes at least one processor and at least one memory.

18. The method of claim 12, further comprising executing each of said plurality of network node executable images executes on a corresponding one of said at least one emulator machine, said corresponding one of said at least E one emulator machine including at least one processor and at least one memory.

19. The method of claim 18, further comprising communicating among said plurality of emulator machines over a local area network.

20. The method of claim 19, wherein said communicating comprises communicating over an Ethernet local area network.

21. The method of claim 12, further comprising executing at least one of said plurality of network node executable images executes on an associated plurality of said at least one emulator machine.