System and method for providing multicast delivery in a network environment

• US 9,559,855 B2
• Filed: 05/20/2010
• Issued: 01/31/2017
• Est. Priority Date: 05/20/2010
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Dec, Wojciech, Townsley, William M., Troan, Ole, Venaas, Stig I.
• Primary Examiner(s): Harper, Kevin C
• Assistant Examiner(s): Rose, Derrick V
• Application Number:
  US12/784,278
• Publication Number:
  US 20110286470A1
• Time in Patent Office: 2,448 Days
• Field of Search: 370/466, 370/312, 370/467, 370/389, 370/390, 370/395.52, 709/230
• US Class Current: 1/1
• CPC Class Codes: H04L 12/1836 with heterogeneous network architecture
• CPC Class Codes: H04L 12/2874 Processing of data for distribution to the subscribers
• CPC Class Codes: H04L 12/2876 Handling of subscriber policies group policies management H04L41/0893
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04L 61/251 between different IP versions
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/085 specially adapted for interworking of IP-based networks with other networks
• CPC Class Codes: H04L 69/167 Adaptation for transition between two IP versions, e.g. between IPv4 and IPv6 translation of Internet protocol [IP] addresses H04L61/2503

Abstract

A method is provided in one example and includes receiving signaling data associated with a request for a multicast channel, the request includes an Internet protocol version 6 (IPv6) source and an IPv6 group address. The method may also include identifying an Internet protocol version 4 (IPv4) source and an IPv4 group address to be mapped to the IPv6 source and the IPv6 group address. The signaling data can be converted from a first protocol to a second protocol. The converted signaling data can be communicated to a network element. In more particular embodiments, the network element is an IP edge router configured to join the multicast channel and stream data in response to receiving the converted signaling data. The IP edge router can be configured to perform an encapsulation operation to transport IPv6 multicast packets within an IPv4 multicast channel.

Claims

1. A method, comprising:

receiving, at a first hop 6rd border router, multicast signaling data associated with a request for a multicast channel, wherein the request includes an Internet protocol version 6 (IPv6) source and an IPv6 group address, wherein the 6rd border router is provisioned between an IPv6 enabled site and an IPv4 enabled service provider;

identifying an Internet protocol version 4 (IPv4) equivalent multicast source and group address to be mapped to the IPv6 source and the IPv6 group address, wherein an IPv6 packet from the IPv6 source follows an IPv4 routing topology within an IPv4 network;

converting the multicast signaling data from a first protocol to a second protocol at a residential gateway, wherein the first protocol is a multicast listener discovery (MLD) protocol and the second protocol is an Internet Management Group Protocol (IGMP), and wherein the residential gateway is in communication with more than one IPv6 multicast receiver, wherein converting the multicast signaling data from the first protocol to the second protocol includes converting an MLD request to an IGMP request, wherein the MLD request includes an IPv6 group address and an IPv6 source address and the conversion includes translating the MLD request to an IGMP request by mapping the IPv6 group address to an IPv4 group address and the IPv6 source address to an IPv4 source address; and

communicating the converted multicast signaling data to a digital subscriber line access multiplexer (DSLAM) for communication to the 6rd border router, wherein the 6rd border router is configured for IPv6 multicasting within a 6rd domain.

2. The method of claim 1, wherein an addressing plan is configured for a network in which the 6rd border router resides, the addressing plan including IPv4 and IPv6 object mappings.

3. The method of claim 1, further comprising:

receiving IPv4 packets that include IPv4 headers that are part of encapsulated IPv6 packets;

removing the IPv4 headers from the IPv4 packets; and

communicating the IPv6 packets to a host associated with the request for the multicast channel.

4. The method of claim 1, further comprising:

accessing a mapping table that includes mappings between the IPv6 source and the IPv6 group address, and the IPv4 multicast source and group address.

5. The method of claim 1, wherein the 6rd border router is configured to join the multicast channel and stream data in response to receiving the converted signaling data.

6. The method of claim 5, wherein the 6rd border router is configured to perform an encapsulation operation to transport IPv6 multicast packets within an IPv4 multicast channel.

20. The method of claim 1, wherein the IPv4 group address is a source specific multicast group address.

21. The method of claim 1, wherein the converted multicast signaling data allows for an IPv6 multicast within a 6rd domain.

22. The method of claim 1, wherein the operational domain of the 6rd border router is limited to a service provider'"'"'s network.

23. The method of claim 1, wherein the multicast signaling data utilizes an IPv4 multicast infrastructure in a service provider network.

24. The method of claim 1, wherein the 6rd router is a border router and represents a first hop IP router.

7. A method, comprising:

receiving multicast signaling data associated with a request;

joining a multicast channel, wherein the multicast signaling data has been converted from a first protocol to a second protocol at a residential gateway, wherein the first protocol is a multicast listener discovery (MLD) protocol and the second protocol is an Internet Management Group Protocol (IGMP), wherein converting the multicast signaling data from the first protocol to the second protocol includes converting an MLD request to an IGMP request, wherein the MLD request includes an IPv6 group address and an IPv6 source address and the conversion includes translating the MLD request to an IGMP request by mapping the IPv6 group address to an IPv4 group address and the IPv6 source address to an IPv4 source address, and wherein the residential gateway is in communication with more than one IPv6 multicast receiver;

encapsulating Internet version 6 (IPv6) packets that include an Internet protocol version 6 (IPv6) multicast source and group address to be transported over an Internet protocol version 4 (IPv4) multicast channel by identifying an Internet protocol version 4 (IPv4) equivalent multicast source and group address, wherein an IPv6 packet from a IPv6 source follows an IPv4 routing topology within an IPv4 network; and

communicating the packets to a digital subscriber line access multiplexer (DSLAM) for communication to a first hop 6rd border router, wherein the 6rd border router is configured for IPv6 multicasting within a 6rd domain, wherein the 6rd border router is provisioned between an IPv6 enabled site and an IPv4enabled service provider.

8. The method of claim 7, wherein an addressing plan is configured for a network in which the multicast signaling data propagates, the addressing plan including IPv4 and IPv6 object mappings.

9. The method of claim 7, further comprising:

evaluating the request in order to identify the IPv4 multicast channel.

10. The method of claim 7, further comprising:

accessing a mapping table that includes mappings between IPv6 objects and IPv4 objects.

11. An apparatus, comprising:

a memory element configured to store data,

a processor operable to execute instructions associated with the data, and

a multicast tunneling module, the apparatus being configured to cause the processor to;

receive multicast signaling data associated with a request for a multicast channel, wherein the request includes an Internet protocol version 6 (IPv6) IPv6 source and an IPv6 group address;

identify an Internet protocol version 4 (IPv4) equivalent multicast source and group address to be mapped to the IPv6 source and the IPv6 group address, wherein an IPv6 packet from the IPv6 source follows an IPv4 routing topology within an IPv4 network;

convert the multicast signaling data from a first protocol to a second protocol at a residential gateway, wherein the first protocol is a multicast listener discovery (MLD) protocol and the second protocol is an Internet Management Group Protocol (IGMP), wherein converting the multicast signaling data from the first protocol to the second protocol includes converting an MLD request to an IGMP request, wherein the MLD request includes the IPv6 group and the IPv6 source address and the conversion includes translating the MLD request to an IGMP request by mapping the IPv6 group address to an IPv4 group address and the IPv6 source address to an IPv4 source address, and wherein the residential gateway is in communication with more than one IPv6 multicast receiver; and

communicate the converted multicast signaling data to a digital subscriber line access multiplexer (DSLAM) for communication to a 6rd border router, wherein the 6rd border router is configured for IPv6 multicasting within a 6rd domain, wherein the 6rd border router is provisioned between an IPv6 enabled site and an IPv4 enabled service provider.

12. The apparatus of claim 11, further comprising:

an addressing plan configured for a network in which the network element resides, the addressing plan including IPv4 and IPv6 object mappings.

13. The apparatus of claim 11, further comprising:

a mapping table that includes mappings between the IPv6 source and the IPv6 group address, and the IPv4 multicast source and group address, wherein the mapping table is accessed by the multicast tunneling module.

14. The apparatus of claim 11, wherein the multicast tunneling module is further configured to:

receive IPv4 packets that include IPv4 headers that are part of encapsulated IPv6 packets;

remove the IPv4 headers from the IPv4 packets; and

communicate the IPv6 packets to a host associated with the request for the multicast channel.

15. The apparatus of claim 11, wherein the 6rd border router is configured to join the multicast channel and stream data in response to receiving the converted signaling data.

16. The apparatus of claim 15, wherein the 6rd border router is configured to perform an encapsulation operation to transport IPv6 multicast packets within an IPv4 multicast channel.

17. An apparatus, comprising:

a memory element configured to store data,

a processor operable to execute instructions associated with the data, and

a multicast tunneling module, the apparatus being configured to cause the processor to;

receive multicast signaling data associated with a request;

join a multicast channel, wherein the multicast signaling data has been converted from a first protocol to a second protocol at a residential gateway, wherein the first protocol is a multicast listener discovery (MLD) protocol and the second protocol is an Internet Management Group Protocol (IGMP), and wherein the residential gateway is in communication with more than one IPv6 multicast receiver, wherein converting the multicast signaling data from a first protocol to a second protocol includes converting an MLD request to an IGMP request, wherein the MLD request includes an Internet version 6 (IPv6) group address and an IPv6 source address and the conversion includes translating the MLD request to an IGMP request by mapping the IPv6 group address and the IPv6 source address to an Internet protocol version 4 (IPv4) group address and an IPv4 source address;

encapsulate packets that include an IPv6 multicast source and group address to be transported over an IPv4 multicast channel by identifying an IPv4 equivalent multicast source and group address, wherein an IPv6 packet from the IPv6 source follows an IPv4 routing topology within an IPv4 network; and

communicate the packets to a digital subscriber line access multiplexer (DSLAM) for communication to a 6rd border router, wherein the 6rd border router is configured for IPv6 multicasting within a 6rd domain, wherein the 6rd border router is provisioned between an IPv6 enabled site and an IPv4 enabled service provider.

18. The apparatus of claim 17, further comprising:

an addressing plan configured for a network in which the multicast signaling data propagates, the addressing plan including IPv4 and IPv6 object mappings.

19. The apparatus of claim 17, further comprising:

a mapping table that includes mappings between IPv6 objects and IPv4 objects, wherein the mapping table is accessed by the multicast tunneling module.