Forming multicast distribution structures using exchanged multicast optimization data
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United States of America Patent
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Sep 18, 2012
Grant Date -
Aug 2, 2007
app pub date -
Jun 1, 2006
filing date -
Jan 30, 2006
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Abstract
Network devices in a multicast network exchange multicast optimization data to improve efficiency of multicasting in the network. A protocol, e.g., a routing protocol or a multicast protocol, may be extended to allow the network devices to exchange the multicast optimization data. Alternatively, a separate protocol may be established for exchanging MOD. A network device may receive a message from an upstream device located between the device and a source for a multicast group, wherein the message includes multicast optimization data that specifies at least one criterion for selecting an upstream device. The device may use the data to intelligently select an optimal upstream device for receiving multicast using any of a variety of criteria to rank the upstream routers, such as minimization of multicast traffic duplication, load balancing current bandwidth levels, and avoiding paths experiencing communication delays.
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