System device and method for reducing forwarding states in a communication system
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United States of America Patent
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Mar 16, 2004
Grant Date -
N/A
app pub date -
May 7, 1999
filing date -
May 7, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system, device, and method for reducing forwarding states in a network domain designates a forwarding device to forward multicast packets for the (source, group) pair. A number of (source, group) pairs may be aggregated to form an aggregated (source, group) pair that is rooted at the forwarding device. For each multicast packet forwarded by the forwarding device, the forwarding device inserts an option field identifying the forwarding device. Interior devices in the network domain forward multicast packets based upon at least the forwarding device identified in the option field of the multicast packet, particularly by maintaining a list of forwarding devices in the network domain and electing a designated forwarding device from which to receive multicast packets. The interior devices forward multicast packets received from the designated forwarding device, and drop multicast packets received from other forwarding devices.
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