Patent ID: 8605629

Claim:
A method comprising: receiving, by a lawful interception module of a network device and from a particular device, a lawful interception request for a subscriber; informing, by the lawful interception module, a routing module of the network device about the subscriber; providing, by the lawful interception module and to the routing module, information identifying an interface corresponding to the subscriber; receiving, by the routing module, a multicast join request from the subscriber; and inserting, by the routing module and when the multicast join request is received, the information identifying the interface into a multicast distribution table, of the network device, as a forwarding interface, the multicast distribution table including: a first field including a first entry for a multicast group address associated with a provider, a second field including a second entry for a source address associated with the provider, and a third field including a third entry for the forwarding interface, the forwarding interface being associated with the multicast group address of the first entry, the provider providing multicast traffic intended for the subscriber, and the forwarding interface directing a copy of the multicast traffic, intended for the subscriber, to the particular device that provided the lawful interception request to the lawful interception module.