17 MANAGING D EVICE D IAGNOSTICSThis section contains information for viewing and configuring port andcable diagnostics, and includes the following topics:■ Configuring Port Mirroring■ Viewing Cable DiagnosticsConfiguring PortMirroringPort mirroring monitors and mirrors network traffic by forwarding copiesof incoming and outgoing packets from one port to a monitoring port.Port mirroring can be used as a diagnostic tool as well as a debuggingfeature. Port mirroring also enables switch performance monitoring.Network administrators can configure port mirroring by selecting aspecific port from which to copy all packets, and other ports to which thepackets copied.The monitor user has limited access to this page.This section contains the following topics:■ Defining Port Mirroring■ Removing Port Mirroring