Patent application number | Description | Published |
20090129383 | HUB AND SPOKE MULTICAST MODEL - Techniques for implementing multicast messaging between spokes in a hub and spoke network are provided in the present disclosure. Multicast messages may be efficiently routed by creating separate multicast groups for upstream traffic from a source spoke to the hub (a “To Hub” group joined by the hub) and downstream traffic from the hub to spokes (a “From Hub” group joined by spokes interested in receiving multicast messages). A source spoke may send a multicast message encapsulated in a packet with the “To Hub” group address as the destination. Upon receipt, the hub may re-route the multicast message to spokes that have joined the “From Hub” group by encapsulating the original message in a packet with the “From Hub” group address as the destination. | 05-21-2009 |
20100054245 | SYSTEM AND METHOD FOR MULTICASTING IN AN INTERNET PROTOCOL VIRTUAL PRIVATE NETWORK ENVIRONMENT - A method is provided in one example implementation and includes sending a PIM join message to the second spoke router by the hub router. The second spoke router dynamically determines each interested remote spoke router by parsing a hub-sent PIM message and accordingly constructs the multicast routing entry such that the first and second spoke routers establish multicast communication independent of a hub router. In more specific embodiments, the PIM join/prune messaging includes a list of each downstream spoke router that sent a PIM join/prune, in a new attribute. The PIM join/prune message is sent by the hub router towards a multicast source. A new receiver-list attribute is created that the hub router populates with a non-broadcast multi-access (NBMA) address for each interested spoke router. | 03-04-2010 |
20110051727 | Network based multicast stream duplication and merging - In one embodiment, a method includes receiving a join message from a receiver at a receiver edge router, the join message identifying a source and a group, and creating at least two forwarding trees for transmitting multicast data streams comprising duplicate data to the receiver edge router. The forwarding trees include a root at a source edge router in communication with the source, and different network paths. The method further includes receiving a packet from one of the forwarding trees and processing the received packet to determine if the packet is a duplicate of another packet received at the receiver edge router. If the packet is a duplicate packet, it is discarded. If the packet is not a duplicate, it is forwarded to the receiver. An apparatus is also disclosed. | 03-03-2011 |
20110317695 | SYSTEM AND METHOD FOR PROVIDING A PATH AVOIDANCE FEATURE IN A NETWORK ENVIRONMENT - A method is provided in one example and includes evaluating multiple paths in a network in order to execute a reverse path forwarding decision for multicast traffic associated with a source. The method may also include selecting a second network path based on a first network path previously been designated as a route for the multicast traffic associated with the source. The first network path and a second network path differ by at least one network element. The method further includes receiving at least one of a first data stream and a second data stream, wherein the first data stream is associated with the first network path and the second data stream is associated with the second network path. | 12-29-2011 |
20120218898 | Bandwidth utilization for equal cost multiple paths - In one embodiment, a method includes identifying a packet at an upstream node in communication with a source and in communication with a downstream node through equal cost multiple paths including first and second multi-access networks, the packet transmitted on the first multi-access network and associated with a multicast group, and transmitting from the upstream node a request to the downstream node to join the group on the second multi-access network, if the upstream node is already transmitting data to the group on the second multi-access network, or a bandwidth utilization at the first multi-access network exceeds a specified threshold. An apparatus is also disclosed. | 08-30-2012 |
20120294308 | Protocol independent multicast designated router redundancy - In one embodiment, a method includes transmitting a packet from a router located in a communication path between a source and a receiver, the load balancing packet having one or more values used to select a group designated router from a list of candidate group designated routers for multicast traffic streams, selecting the router as said group designated router for one or more of the multicast traffic streams, and forwarding traffic for the one or more multicast traffic streams to the receiver. The candidate group designated routers are last hop routers for transmitting the multicast traffic streams to a common link connected to the receiver. An apparatus is also disclosed. | 11-22-2012 |
20120294309 | METHOD OF ROUTING MULTICAST TRAFFIC - A method of routing multicast traffic in a computer network is disclosed. The method comprises associating a plurality of multicast group addresses on a network device with respective multicast routing topologies. A network device and a network are also disclosed. | 11-22-2012 |
20140079058 | METHOD OF ROUTING MULTICAST TRAFFIC - A method of routing multicast traffic in a computer network is disclosed. The method comprises associating a plurality of multicast group addresses on a network device with respective multicast routing topologies. A network device and a network are also disclosed. | 03-20-2014 |