Multiplex communications – Pathfinding or routing – Store and forward
Reexamination Certificate
2004-07-23
2008-11-04
Yao, Kwang B. (Department: 2616)
Multiplex communications
Pathfinding or routing
Store and forward
C370S432000
Reexamination Certificate
active
07447225
ABSTRACT:
A technique prevents multiple multicast forwarders from forwarding multicast packets for a route over a link in a computer network during non-stop forwarding (NSF) recovery of one or more failures in a control plane of a multicast router. The multicast router has a functional infrastructure that allows data traffic forwarding operations to continue throughout a data plane of the router in the presence of a failure and/or software restart to a multicast component, e.g., a protocol independent multicast (PIM) routing protocol, executing in the control plane. Another multicast component, e.g., a multicast forwarding information base (MFIB) executing in the data plane, is configured to prevent multiple multicast forwarders due to routing changes in the network that arise during NSF recovery.
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Kouvelas Isidoros
Windisch Kurt J.
Cesari and McKenna LLP
Cisco Technology Inc.
Tran Tung Q
Yao Kwang B.
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