Scalable IP-services enabled multicast forwarding with efficient resource utilization
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United States of America Patent
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Oct 20, 2015
Grant Date -
Jun 4, 2015
app pub date -
Feb 6, 2015
filing date -
Sep 24, 2004
priority date (Note) -
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Abstract
Methods, apparatus and data structures are provided for managing multicast IP flows. According to one embodiment, active multicast IP sessions are identified by a network device. A data structure is maintained by the network device and contains therein information regarding the multicast sessions, including a first value for each of the multicast sessions, at least one chain of one or more blocks of second values and one or more transmit control blocks (TCBs). Each first value is indicative of a chain of one or more blocks of second values. Each second value corresponds to an outbound interface (OIF) participating in the multicast session and identifies a number of times packets associated with the multicast session are to be replicated. The TCBs have stored therein control information to process or route packets. Each second value is indicative of a TCB that identifies an OIF of the network device through which packets are to be transmitted.
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