| Publisher | Sun Microsystems | ||
|---|---|---|---|
| Format | 230.0KB PDF, requires Acrobat Rdr 5 | Date added | 01 Oct 2002 |
| Topics | Switching | ||
| Downloads | 22 | ||
This paper describes a novel method for scheduling high-speed network switches. The targeted architecture is an input-buffered switch with a non-blocking switch fabric. The input buffers are organized as virtual output queues to avoid head-of-line blocking. The task of the scheduler is to decide when the input ports can forward packets from the virtual output queues to the corresponding output ports. Our Least Choice First (LCF) scheduling method selects the input and output ports to be matched by prioritizing the input ports according to the number of virtual output queues that contain packets: The fewer virtual output queues with packets, the higher the scheduling priority of the input port.
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