Internally Buffered Packet Switches

Authored by: Roberto Rojas-Cessa

Interconnections for Computer Communications and Packet Networks

Print publication date:  January  2017
Online publication date:  November  2016

Print ISBN: 9781482226966
eBook ISBN: 9781315373485
Adobe ISBN:


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Network traffic coming through a switch may face output contention. Blocking switches are susceptible to contention for internal links, such as Banyan switches. To avoid losing packets that lose contention for internal resources or for output ports, buffers may be allocated at the switching elements of the fabric rather than outside, such as in input- or output-queued switches. Switches with buffers in the fabric are called internally buffered. In these switches, memory may be dedicated to specific input-output interconnection or be shared by different interconnections. In this chapter, we focus on internally buffered nonblocking switches that have dedicated memory. Specifically, the considered switch fabric is a crossbar.

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