312 Configuring Switching InformationModifying a Port Mirroring Session1. Open the Port Mirroring page.2. Modify the fields.3. Click Apply Changes.The port mirroring session fields are modified, and the device is updated.Removing a Port Mirroring Session1. Open the Port Mirroring page.2. Select the Reset Session check box.3. Click Apply Changes.The port mirroring session is removed, and the device is updated.Configuring a Port Mirroring Session Using CLI CommandsFor information about the CLI commands that perform this function, see the following chapter in theCLI Reference Guide:• Port Monitor CommandsThe following table summarizes the equivalent CLI commands for this feature.Flow Based MirroringThe flow based mirroring feature builds upon the DiffServ component in QoS. In QoS, the user createstraffic classes to define match criteria, then policies to define the action to be taken on that traffic class.Flow based mirroring allows the user to copy certain types of traffic to a single destination port. Thisprovides flexibility—instead of mirroring all ingress or egress traffic on a port, the switch can mirror asubset of that traffic. You can configure the switch to mirror flows based on Layer 2, Layer 3, and Layer 4information.Use the Flow Based Mirroring page to specify flow-based mirroring ports.To display the Flow Based Mirroring page, click Switching →Traffic Mirroring →Flow Based Mirroringin the tree view.Table 7-16. Port Monitor CommandsCLI Command Descriptionmonitor session Configure a probe port and a monitored port for monitor session (portmonitoring).show monitor session Displays status of port monitoring.