1-11 Port Mirroring ConfigurationIntroduction to Port MirroringPort mirroring is to copy the packets passing through a port (called a mirroring port) to another port(called the monitor port) connected with a monitoring device for packet analysis.You can select to port-mirror inbound, outbound, or bidirectional traffic on a port as needed.Implementing Port MirroringPort mirroring is implemented through local port mirroring groups. The following subsections describehow local port mirroring is implemented.Local port mirroringIn local port mirroring, all packets (including protocol and data packets) passing through a port can bemirrored. Local port mirroring is implemented through a local mirroring group.As shown in Figure 1-1, packets on the mirroring port are mirrored to the monitor port for the datamonitoring device to analyze.Figure 1-1 Local port mirroring implementationPCMirroring portMonitor portData monitoring deviceMirroring portHow the device processes packetsMonitor portTrafficmirrored toConfiguring Port MirroringConfiguration Task ListConfiguring local port mirroringTo configure local port mirroring, you must create a local mirroring group and then specify the mirroringports and monitor port for the group.
