Multicast and unicast scheduling for a network device

Multicast and unicast scheduling for a network device

A method and apparatus are provided for scheduling unicast and multicast data in an input-queued network device. According to one aspect of the present invention, a combined schedule is created by pipelined staging of multicast and unicast scheduling. Multicast cells are scheduled for transmission a...

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Hauptverfasser: Angle, Richard L, Jagannath, Shantigram V, Ladwig, Geoffrey B, Yin, Nanying
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creator Angle, Richard L
Jagannath, Shantigram V
Ladwig, Geoffrey B
Yin, Nanying
description A method and apparatus are provided for scheduling unicast and multicast data in an input-queued network device. According to one aspect of the present invention, a combined schedule is created by pipelined staging of multicast and unicast scheduling. Multicast cells are scheduled for transmission among multiple interfaces of a crossbar by performing a multicast cell scheduling cycle for multiple classes of service that are supported by the network device. Then, unicast cells are scheduled for transmission among the interfaces at a lower priority than the previously scheduled multicast cells by performing a unicast cell scheduling cycle for the multiple classes of service using only those interfaces that remain unmatched after completion of the multicast cell scheduling cycle.
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title Multicast and unicast scheduling for a network device
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