This article explains how to configure port mirroring on MX devices with the help of an example. Port mirroring can be used for traffic analysis on routers and switches that, unlike hubs, do not broadcast packets to every port on the destination device. Port mirroring sends copies of all packets or policy-based sample packets to local or remote analyzers where you can monitor and analyze the. This section describes how port mirroring sends network traffic to analyzer applications. An analyzer copies bridged (Layer 2) packets to an. Juniper (Gen 2) – Understanding Port Mirroring and Analyzers on EX2300, EX3400, and EX4300 Switches Juniper (Gen 1) – Understanding Port Mirroring on EX2200, EX3200, EX3300, EX4200, EX4500, EX4550, EX6200, and EX8200 Series Switches Juniper – Configuring Mirroring on EX4300 Switches to Analyze. If a DPC or FPC is bound to a named instance of port mirroring, those port mirroring properties apply to all ports associated with that DPC or FPC, overriding any port mirroring properties bound at the chassis level. For ELS details, see Using the Enhanced Layer 2 Software CLI. See Feature Explorer for the latest list of supported platforms and Junos releases that support port mirroring.