Method and apparatus of providing zero configuration single source multicasting reporting

• US 7,716,363 B1
• Filed: 02/10/2004
• Issued: 05/11/2010
• Est. Priority Date: 02/10/2004
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Eckert, Toerless
• Primary Examiner(s): Dharia; Rupal D
• Assistant Examiner(s): Pollack; Melvin H
• Application Number:
  US10/776,940
• Time in Patent Office: 2,282 Days
• Field of Search: 709227-231, 709/237, 709/249, 725/139, 725/151, 370/230, 370389-393, 370/395.43, 370/395.5, 370/395.52, 370/432
• US Class Current: 709/238
• CPC Class Codes: H04L 12/1877 Measures taken prior to transmission
• CPC Class Codes: H04L 12/462 LAN interconnection over a bridge based backbone
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/16 Multipoint routing
• CPC Class Codes: H04L 49/201 Multicast operation; Broadcast operation

Abstract

Methods and apparatus for providing request compatibility in a multicast system are disclosed. In one aspect, a layer 2 switch is configured to receive traffic requests from a group of receivers, determine whether the traffic requests contain incompatible request types. If incompatible request types exist, then the switch may separate the traffic requests into groups based on type, and send the requests of different types to a router from distinct addresses.

Claims

1. A method for providing request compatibility in a multicast system, said method comprising:

receiving, by a layer 2 switch coupled between a group of receivers and a router, requests for traffic from said group of receivers;

determining, by said layer 2 switch, whether said traffic requests contain incompatible request types;

if incompatible request types exist, then separating said traffic requests into at least two groups based on type;

creating a first host identity at said layer 2 switch associated with a first address available to said layer 2 switch;

creating a second host identity at said layer 2 switch associated with a second address available to said layer 2 switch; and

sending requests of a first group of said at least two groups from said first host identity of said layer 2 switch to said router, and sending requests of a second group of said at least two groups from said second host identity of said layer 2 switch to said router, to present an appearance to said router that the requests of different types are from different hosts.

2. The method of claim 1, wherein said incompatible request types include a single-source request and an any-source request.

3. The method of claim 2, wherein said single-source request comprises an IGMP v3 request.

4. The method of claim 2, wherein said any-source request comprises an IGMP v2 request.

5. The method of claim 1, wherein said incompatible request types include an include request and an exclude request.

6. The method of claim 1, wherein said first address available to said layer 2 switch is a first MAC address and said second address available to said layer 2 switch is a second MAC address.

7. An apparatus for providing request compatibility in a multicast system, said apparatus comprising:

a layer 2 switch coupled between a group of receivers and a router;

said layer 2 switch configured to;

receive requests for traffic from said group of receivers;

determine whether said traffic requests contain incompatible request types;

separate said traffic requests into at least two groups based on type if incompatible request types exist;

create a first host identity associated with a first address available to said layer 2 switch;

create a second host identity associated with a second address available to said layer 2 switch; and

send requests of a first group of said at least two groups from said first host identity to said router and send requests of a second group of said at least two groups from said second host identity to said router, to present an appearance to said router that the requests of different types are from different hosts.

8. The apparatus of claim 7, wherein said incompatible request types include a single-source request and an any-source request.

9. The apparatus of claim 8, wherein said single-source request comprises an IGMP v3 request.

10. The apparatus of claim 8, wherein said any-source request comprises an IGMP v2 request.

11. The apparatus of claim 7, wherein said incompatible request types indude an include request and an exclude request.

12. The apparatus of claim 7, wherein said first address available to said layer 2 switch is a first MAC address and said second address available to said layer 2 switch is a second MAC address.

13. An apparatus for providing request compatibility in a multicast system, said apparatus comprising:

means for receiving, at a layer 2 switch coupled between a group of receivers and a router, requests for traffic from said group of receivers;

means for determining, at said layer 2 switch, whether said traffic requests contain incompatible request types;

means for separating said traffic requests into at least two groups based on type if incompatible request types exist;

means for creating a first host identity at said layer 2 switch associated with a first address available to said layer 2 switch;

means for creating a second host identity at said layer 2 switch associated with a second address available to said layer 2 switch; and

means for sending requests of a first group of said at least two groups from said first host identity of said layer 2 switch different types to said router, and sending requests of a second group of said at least two groups from said second host identity of said layer 2 switch to said router, to present an appearance to said router that the requests of different types are from different hosts.

14. The apparatus of claim 13, wherein said incompatible request types indude a single-source request and an any-source request.

15. The apparatus of claim 14, wherein said single-source request comprises an IGMP v3 request.

16. The apparatus of claim 14, wherein said any-source request comprises an IGMP v2 request.

17. The apparatus of claim 13, wherein said incompatible request types include an include request and an exclude request.

18. The apparatus of claim 13, wherein said first address available to said layer 2 switch is a first MAC address and said second address available to said layer 2 switch is a second MAC address.

19. A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform a method for providing request compatibility in a multicast system, said method comprising:

receiving, by a layer 2 switch coupled between a group of receivers and a router, requests for traffic from said group of receivers;

determining, by said layer 2 switch, whether said traffic requests contain incompatible request types;

if incompatible request types exist, then separating said traffic requests into at least two groups based on type;

creating a first host identity at said layer 2 switch associated with a first address available to said layer 2 switch;

creating a second host identity at said layer 2 switch associated with a second address available to said layer 2 switch; and

sending requests of a first group of said at least two groups from said first host identity of said layer 2 switch to said router, and sending requests of a second group of said at least two groups from said second host identity of said layer 2 switch to said router, to present an appearance to said router that the requests of different types are from different hosts.

20. The device of claim 19, wherein said incompatible request types indude a single-source request and an any-source request.

21. The device of claim 20, wherein said single-source request comprises an IGMP v3 request.

22. The device of claim 20, wherein said any-source request comprises an IGMP v2 request.

23. The device of claim 19, wherein said incompatible request types include an include request and an exclude request.

24. The device of claim 19, wherein said first address available to said layer 2 switch is a first MAC address and said second address available to said layer 2 switch is a second MAC address.

25. A method comprising:

receiving, by a switch coupled between a group of receivers and a router, a plurality of Internet Group Multicast Protocol (IGMP) requests;

determining, by the switch, that the plurality of IGMP requests include both IGMP requests of a first type and IGMP requests of a second type;

separating the plurality of IGMP requests into at least two groups based on their type, a first group to include the IGMP requests of the first type and a second group to include the IGMP requests of the second type; and

sending, by the switch, the IGMP requests of the first group to the router using a first Media Access Control (MAC) address assigned to the switch and sending the IGMP requests of the second group to the router using a second MAC address assigned to the switch, the second MAC address different from the first MAC address, to present an appearance to the router that the IGMP requests of the first type and the IGMP requests of the second type are from different hosts.

26. The method of claim 25, wherein the IGMP requests of the first type are IGMP include requests that request a particular source be included.

27. The method of claim 25, wherein the IGMP requests of the second type are IGMP exclude requests that request a particular source be excluded.

28. The method of claim 25, further comprising:

separately aggregating, by the router, the IGMP requests of the first type and the IGMP requests of the second type.

29. A switch comprising:

at least one port configured to receive a plurality of Internet Group Multicast Protocol (IGMP) requests;

a processor; and

a memory storing instructions that, when executed by the processor, determine that the plurality of IGMP requests include both IGMP requests of a first type and IGMP requests of a second type, separate the plurality of IGMP requests into at least two groups based on their type, a first group to include the IGMP requests of the first type and a second group to include the IGMP requests of the second type, and send the IGMP requests of the first group to a router using a first Media Access Control (MAC) address assigned to the switch and send the IGMP requests of the second group to the router using a second MAC address assigned to the switch, the second MAC address different from the first MAC address, to present an appearance to the router that the IGMP requests of the first type and the IGMP requests of the second type are from different hosts.

30. The switch of claim 29, wherein the IGMP requests of the first type are IGMP include requests that request a particular source be included.

31. The switch of claim 29, wherein the IGMP requests of the second type are IGMP exclude requests that request a particular source be excluded.

32. The switch of claim 29, wherein the instructions, when executed by the processor, separately aggregate the IGMP requests of the first type and the IGMP requests of the second type.