Precedence of Port-Mirroring Instances at Different Levels of the Chassis

If port-mirroring instances are configured at multiple levels in the MX-series router hierarchy, the port-mirroring properties are applied as follows:

1. Chassis-level port-mirroring properties apply to all ports in the chassis. If an MX-series router is configured with the global port-mirroring instance, those chassis-level properties apply to all DPCs and their Packet Forwarding Engines and their associated ports.
2. FPC-level port-mirroring properties override chassis-level properties. If a DPC is bound to a named port-mirroring instance, those FPC-level properties apply to all Packet Forwarding Engines (and their associated ports) on the DPC and override the properties bound at the chassis level (if the port-mirroring statement has been included at the [edit forwarding-options] hierarchy level).
3. PIC-level port-mirroring properties override FPC-level properties.. If a Packet Forwarding Engine bound to a named port-mirroring instance, those PIC-level port-mirroring properties apply to all ports associated with the Packet Forwarding Engine and override the properties bound at the FPC level (if the port-mirror-instance pm-instance-name-a statement has been included at the [edit chassis fpc slot-number] hierarchy level).

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