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DTCP-Initiated Traffic Mirroring Process

Figure 1 shows the process for a DTCP-initiated subscriber mirroring operation.

Figure 1: DTCP-Initiated Subscriber Secure Policy ModelDTCP-Initiated Subscriber Secure Policy Model
  1
The LEA sends provisioning information for a subscriber whose traffic is to be mirrored over the HI-1 interface to the mediation device.
  5
As intercept-related events occur, the IAP sends the events in SNMP traps over the INI-2 interface to the mediation device.
  2
The mediation device sends a DTCP ADD message that contains provisioning information over the INI-1 interface to the IAP (the router).
  6
The mediation device provides the intercept-related events over the HI-2 interface to the LEA.
  3
The IAP creates a subscriber secure policy based on information in the DTCP ADD message. If the IAP receives the DTCP ADD before the subscriber logs in, mirroring begins when the subscriber logs in. If the router receives the DTCP ADD after the subscriber logs in, mirroring begins when the ADD message is received.
  7
The IAP sends the mirrored content to the mediation device over the INI-3 interface.
  4
The IAP sends the original subscriber traffic to its intended destination.
  8
The mediation device sends mirrored content over the HI-3 interface to the LEA.