Scalable IP-services enabled multicast forwarding with efficient resource utilization
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United States of America Patent
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Mar 3, 2009
Grant Date -
May 17, 2007
app pub date -
Sep 24, 2004
filing date -
Sep 24, 2004
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Abstract
This document describes, among other things, a router providing service-enabled multicast forwarding for a flow-based architecture. Services are enabled using inbound/outbound policies from Access Control Lists (ACLs). In a first mode, per-flow services are not enabled, and flows are aggregated for efficiency. In a second mode, per-flow services are enabled, and control information for an outbound interface (OIF) is shared across all multicast flows that do not have per-flow service enabled. A flow management scheme for these modes allows dynamic multicast membership updates while reducing disruption of active flows. This supports a large multicast OIF list and a high rate of multicast “Joins” and “Leaves”. This provides scalability and performance, such as desired for deploying multicast for broadband subscriber applications.
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