SYSTEM AND METHOD FOR CONSTRAINED MACHINE ADDRESS LEARNING

• US 20080212578A1
• Filed: 03/02/2007
• Published: 09/04/2008
• Est. Priority Date: 03/02/2007
• Status: Abandoned Application

• Current Assignee: ADVA Optical Networking SE (ADTRAN Holdings, Inc.)
• Original Assignee: ADVA Optical Networking SE (ADTRAN Holdings, Inc.)
• Inventors: Sankey, Wayne Robert, Weeks, John Kevin, Jamieson, Ross Alexander
• Application Number:
  US11/681,647
• Publication Number:
  US 20080212578A1
• Time in Patent Office: Days
• US Class Current: 370/389
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

A system and method for constrained machine address learning comprises provisioning a first network port as being associated with at least one virtual connection at a second network port, and constraining machine address learning to only between the provisioned first network port and its associated at least one virtual connection.

Claims

1. A method of machine address learning at a network equipment having at least one first network port and at least one second network port, comprising:

provisioning a first network port as being associated with at least one virtual connection at a second network port; and

constraining machine address learning to only between the provisioned first network port and its associated at least one virtual connection.

2. The method of claim 1, wherein constraining machine address learning comprises flooding a broadcast frame received from the first network port to only its associated at least one virtual connection.

3. The method of claim 1, wherein constraining machine address learning comprises flooding a multicast frame received from the first network port to only its associated at least one virtual connection.

4. The method of claim 1, wherein constraining machine address learning comprises flooding a frame received from the first network port with an unknown destination machine address to only its associated at least one virtual connection.

5. The method of claim 1, wherein constraining machine address learning comprises forwarding a frame received from the at least one virtual connection with an unknown destination machine address to all network ports associated with the at least one virtual connection.

6. The method of claim 1, wherein provisioning a first network port as being associated with at least one virtual connection at a second network port comprises provisioning a local area network port as being associated with at least one Ethernet virtual circuit at a wide area network port.

7. The method of claim 1, wherein provisioning a first network port as being associated with at least one virtual connection at a second network port comprises provisioning the first network port as being associated with at least one Multiprotocol Label Switching label at the second network port.

8. The method of claim 1, wherein provisioning a first network port as being associated with at least one virtual connection at a second network port comprises provisioning the first network port as being associated with at least one Provider Backbone Bridge tag at the second network port.

9. The method of claim 1, wherein provisioning a first network port as being associated with at least one virtual connection at a second network port comprises provisioning the first network port as being associated with at least one Asynchronous Transfer Mode VPI/VCI at the second network port.

10. A method of machine address learning, comprising:

receiving a frame from a source network port;

parsing the frame and determining a destination machine address and a source machine address;

looking up the destination machine address in a machine address table;

sending a duplicate of the received frame to each virtual connection associated with the source port in response to not finding a match of the destination machine address in a first machine address table;

determining a pointer to a subroutine for determining a destination address in response to finding a match of the destination machine address in the first machine address table;

looking up the source machine address in the first machine address table; and

storing the source machine address in the first machine address table and the source port at a memory location associated with a storage location of the source machine address in the first machine address table, in response to not finding a match of the source machine address in the first machine address table.

13. The method of claim 10, further comprising:

receiving a duplicate frame from a network port;

parsing the duplicate frame and determining a destination port in response to the virtual connection associated with the destination port in the duplicate frame;

looking up the source machine address and destination port of the duplicate frame in a second machine address table; and

storing the source machine address in the second machine address table in response to not finding a match of the source machine address in the second machine address table.

11. A method of machine address learning, comprising:

receiving a frame from a source network port;

parsing the frame and determining a destination machine address and a source machine address, the destination machine address indicating a broadcast frame;

sending a duplicate of the received frame to each virtual connection associated with the source port in response to the destination machine address being a broadcast frame;

looking up the source machine address in the first machine address table; and

storing the source machine address in a first machine address table and the source port at a memory location associated with a storage location of the source machine address in the first machine address table, in response to not finding a match of the source machine address in the first machine address table.

14. The method of claim 11, further comprising:

receiving a duplicate frame from a network port;

parsing the duplicate frame and determining a destination port in response to the virtual connection associated with the destination port in the duplicate frame;

looking up the source machine address and destination port of the duplicate frame in a second machine address table; and

storing the source machine address in the second machine address table in response to not finding a match of the source machine address in the second machine address table.

12. A method of machine address learning, comprising:

receiving a frame from a source network port;

parsing the frame and determining a destination machine address and a source machine address, the destination machine address indicating a multicast frame;

sending a duplicate of the received frame to each virtual connection associated with the source port in response to the destination machine address being a multicast frame;

looking up the source machine address in the first machine address table; and

storing the source machine address in a first machine address table and the source port at a memory location associated with a storage location of the source machine address in the first machine address table, in response to not finding a match of the source machine address in the first machine address table.

15. The method of claim 12, further comprising:

receiving a duplicate frame from a network port;

parsing the duplicate frame and determining a destination port in response to the virtual connection associated with the destination port in the duplicate frame;

looking up the source machine address and destination port of the duplicate frame in a second machine address table; and

storing the source machine address in the second machine address table in response to not finding a match of the source machine address in the second machine address table.

16. A network equipment having at least one first network port and at least one second network port, comprising:

means for provisioning a first network port as being associated with at least one virtual connection at a second network port; and

means for constraining machine address learning to only between the provisioned first network port and its associated at least one virtual connection.

17. The network equipment of claim 16, wherein means for constraining machine address learning comprises means for flooding a broadcast frame received from the first network port to only its associated at least one virtual connection.

18. The network equipment of claim 16, wherein means for constraining machine address learning comprises means for flooding a multicast frame received from the first network port to only its associated at least one virtual connection.

19. The network equipment of claim 16, wherein means for constraining machine address learning comprises means for flooding a frame received from the first network port with an unknown destination machine address to only its associated at least one virtual connection.

20. The network equipment of claim 16, wherein means for constraining machine address learning comprises means for forwarding a frame received from the at least one virtual connection with an unknown destination machine address to the first network port associated with the at least one virtual connection.

21. The network equipment of claim 16, wherein means for provisioning a first network port as being associated with at least one virtual connection at a second network port comprises means for provisioning a local area network port as being associated with at least one Ethernet virtual circuit at a wide area network port.

22. The network equipment of claim 16, wherein means for provisioning a first network port as being associated with at least one virtual connection at a second network port comprises means for provisioning the first network port as being associated with at least one Multiprotocol Label Switching label at the second network port.

23. The network equipment of claim 16, wherein means for provisioning a first network port as being associated with at least one virtual connection at a second network port comprises means for provisioning the first network port as being associated with at least one Provider Backbone Bridges at the second network port.

24. The network equipment of claim 16, wherein means for provisioning a first network port as being associated with at least one virtual connection at a second network port comprises means for provisioning the first network port as being associated with at least one Asynchronous Transfer Mode VPI/VCI at the second network port.

25. A method of machine address learning at a network equipment having at least one first network port and at least one second network port, comprising:

provisioning at least one virtual connection at least one first network port as being associated with at least one virtual connection at least one second network port; and

constraining machine address learning to only between the provisioned at least one virtual connection at the at least one first network port and its associated at least one virtual connection at the at least one second network port.

26. A method of machine address learning at a network equipment having at least one first network port and at least one second network port, comprising:

provisioning at least one virtual connection at least one first network port as being associated with at least one second network port; and

constraining machine address learning to only between the provisioned at least one virtual connection at the at least one first network port and its associated at least one second network port.

27. A network equipment having at least one first network port and at least one second network port, comprising:

means for provisioning at least one virtual connection at least one first network port as being associated with at least one virtual connection at least one second network port; and

means for constraining machine address learning to only between the provisioned at least one virtual connection at the at least one first network port and its associated at least one virtual connection at the at least one second network port.

28. A network equipment having at least one first network port and at least one second network port, comprising:

means for provisioning at least one virtual connection at least one first network port as being associated with at least one second network port; and

means for constraining machine address learning to only between the provisioned at least one virtual connection at the at least one first network port and its associated at least one second network port.