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Overview of Traffic Mirroring

Traffic mirroring allows you to intercept subscriber traffic by configuring a service with the SRC software that applies policies on a JUNOS routing platform in a fashion similar to the application of firewall filters.

When the SAE activates a traffic-mirroring service session, the session applies filters to the forwarding table to mirror traffic using the preconfigured mirroring port and policy-specified filters. The process is similar to service activation on interfaces, but this service is activated on the forwarding table for a JUNOS routing platform and is applicable only to input.

By activating traffic-mirroring services in an SRC-managed environment, service providers can use the SRC software to simplify traffic mirroring on their network equipment. The SRC software can set up a policy to:

Monitor subscriber traffic and intercept traffic from a particular source or to a particular destination.
Take actions for subscribers with intercepted traffic by applying policies to the subscriber traffic.

You must deploy traffic mirroring on JUNOS routing platforms to monitor the subscriber traffic.

The traffic-mirroring application is not compatible with Web application server clusters; it should be run in a standalone Web application server.

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