Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


Configuring Port-Mirroring Instances on M120 Routers


You can associate only one port-mirroring instance with a specific FEB on an M120 router.

To associate a port-mirroring instance with a FEB, include the port-mirror-instance port-mirroring-instance-name statement at the [edit chassis feb slot-number] hierarchy level:

The properties of the port-mirroring instance associated with the FEB override any global port-mirroring properties (configured by including the port-mirroring statement at the [edit forwarding-options] hierarchy level.)


In a FEB redundancy group, you must associate a port-mirroring instance only with the primary FEB. During failover or switchover, the port-mirroring instance is automatically associated with the backup FEB that fails over or switches over as the primary FEB.

For information about configuring FPC-to-FEB connectivity on an M120 router, see Enabling FPC to FEB Connectivity on M120 Routers.