Ethereal User's Guide: V1.1 for Ethereal 0.8.19 | ||
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Many vendor's switches support a feature known as "port spanning" or "port mirroring" in which all of the traffic to and from port A are also sent out port B. An excellent reference on the "port spanning" feature of Cisco switches can be found at Configuring the Catalyst Switched Port Analyzer (SPAN) Feature
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