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RADIUS-Initiated Traffic Mirroring Process at Subscriber Login

Figure 1 shows the process for a RADIUS-initiated subscriber mirroring operation that is initiated when the mirrored subscriber logs in.

Figure 1: RADIUS-Initiated Subscriber Secure Policy Model at LoginRADIUS-Initiated Subscriber Secure Policy Model at Login

The LEA sends provisioning information for a subscriber whose traffic is to be mirrored over the HI-1 interface to the mediation device.


The IAP sends the original subscriber traffic to its intended destination.


The mediation device sends the provisioning information over the INI-1 interface to the RADIUS server.


As subscriber-related events occur, the IAP sends the events in SNMP traps over the INI-2 interface to the mediation device.


The subscriber logs in, requesting authentication by the RADIUS server.


The mediation device provides the events over the HI-2 interface to the LEA.


The RADIUS server authenticates the subscriber and sends an Access-Accept message containing mirroring-related RADIUS attributes in Juniper Networks VSAs to the IAP (the router).


The IAP encapsulates the mirrored content in a packet header and sends it over the INI-3 interface to the mediation device. The IAP uses the destination IP address of the mediation device that it received in the Access-Accept messaged from the RADIUS server.


The IAP creates a subscriber secure policy based on the mirroring VSAs and begins mirroring the subscriber’s traffic.


The mediation device sends mirrored content over the HI-3 interface to the LEA.