3com 3C17701 Specification Guide

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3Com SuperStack 3 Switch 4900 supporting a server farm
Sample configurations
supported by the
SuperStack 3 
Switch 4900 Family
XRN™ technology, which stands for eXpandable
Resilient Networking, is patented, innovative
3Com technology that allows IT managers to
build affordable networks that are highly resilient
and deliver exceptional performance and flexibility.
With XRN technology, multiple interconnected
Gigabit switches behave as a single management
switching entity.  The units actively share the load
in normal operation yet one will near-instantly
recover all connections should the other unit or
its connections have a failure.  XRN technology is
supported by the 3Com SuperStack 3 Switch
4900 for server aggregation and by the 3Com
Switch 40x0 for building core networking.  It is
high resiliency without complexity.
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SuperStack 3 Switch 4900 family switches can
deliver Gigabit-to-the-desktop with Layer 2/3/4
switching for bandwidth-intensive networks.