To continue creating a port mirroring session, select sources and traffic direction for the new port mirroring session.

You can create a port mirroring session without setting the source and destinations. When a source and destination are not set, a port mirroring session is created without the mirroring path. This allows you to create a port mirroring session with the correct properties set. Once the properties are set, you can edit the port mirroring session to add the source and destination information.

Note: Consider the following limitations when selecting port mirroring sources.
  • A source mirror port cannot be used in more than one mirror session.
  • A port cannot be used as a mirror source and mirror destination in the same or different mirror sessions at the same time.


  1. Select the source of the traffic to be mirrored and the traffic direction.
    Depending on the type of port mirroring session you selected, different options are available for configuration.
    Option Description
    Add existing ports from a list Click Select distributed ports. A dialog box displays a list of existing ports. Select the check box next to the distributed port and click OK. You can choose more than one distributed port.
    Add existing ports by port number Click Add distributed ports, enter the port number and click OK.
    Set the traffic direction After adding ports, select the port in the list and click the ingress, egress, or ingress/egress button. Your choice appears in the Traffic Direction column.
    Specify the source VLAN If you selected a Remote Mirroring Destination sessions type, you must specify the source VLAN. Click Add to add a VLAN ID. Edit the ID by using the up and down arrows, or by clicking in the field and entering the VLAN ID manually.
  2. Click Next.