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You can use port mirroring to specify a destination port on which you want to see mirrored traffic and specify the source ports from which traffic is mirrored. Any packets entering or leaving the specified ports are forwarded normally and a copy of the packets is sent out the mirror port. You can configure up to 100 entries in the MirroredPort field for mirroring, and you can have up to 25 entries active (enabled) at any given time. When the port mirroring feature is active, all packets received on the port(s) specified by the MirroredPort field are copied to MirroringPort. The mirroring operation is nonintrusive; mirrored traffic is always treated in the lowest priority queue.
You can also use the port mirroring feature to monitor traffic from MAC addresses where traffic with a given MAC source address (SA) or MAC destination address (DA) is copied to the mirror port. This feature is enabled by setting the Monitor field to true for a MAC address in the Forwarding dialog box.
Note:
Monitoring of MAC address traffic must be within the context of a VLAN (see "Viewing the forwarding database," in Configuring Switching and Routing Operations for the Passport 8000 Series Switch Using Device Manager Release 5.x.x).
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