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 Login

1 — The LEA sends provisioning information for a subscriber whose traffic is to be mirrored over the HI-1 interface to the mediation device.	6 — The IAP sends the original subscriber traffic to its intended destination.
2 — The mediation device sends the provisioning information over the INI-1 interface to the RADIUS server.	7 — As subscriber-related events occur, the IAP sends the events in SNMP traps over the INI-2 interface to the mediation device.
3 — The subscriber logs in, requesting authentication by the RADIUS server.	8 — The mediation device provides the events over the HI-2 interface to the LEA.
4 — 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).	9 — 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.
5 — The IAP creates a subscriber secure policy based on the mirroring VSAs and begins mirroring the subscriber’s traffic.	10 — The mediation device sends mirrored content over the HI-3 interface to the LEA.