Port Mirroring, also known as SPAN (Switched Port Analyzer), is a method of monitoring network traffic. By configuring your existing switches and hubs to replicate network traffic and send copies to a designated monitoring port, you can capture and analyze the data without interrupting its normal flow. The SPAN sessions send a copy (mirror) of the traffic to another interface or VLAN on the switch that has been connected to a network analyzer or. A fundamental technique used to accomplish this is Port Mirroring, also known in Cisco networks as SPAN (Switched Port Analyzer). This guide provides you with clear, step-by-step instructions on configuring SPAN port mirroring on Cisco switches, along with expert tips to help you avoid common. An administrator wants to mirror the inbound traffic from workstation "X" on port A5 and workstation "Y" on port B17 to a traffic analyzer connected to port C24 (see Figure 1. ) In this case, the administrator chooses "1" as the session number.
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